Monitoring REST API

Flink has a monitoring API that can be used to query status and statistics of running jobs, as well as recent completed jobs. This monitoring API is used by Flink’s own dashboard, but is designed to be used also by custom monitoring tools.

The monitoring API is a REST-ful API that accepts HTTP requests and responds with JSON data.

Overview
Developing
API
- Dispatcher
Legacy

Overview

The monitoring API is backed by a web server that runs as part of the Dispatcher. By default, this server listens at post 8081, which can be configured in flink-conf.yaml via rest.port. Note that the monitoring API web server and the web dashboard web server are currently the same and thus run together at the same port. They respond to different HTTP URLs, though.

In the case of multiple Dispatchers (for high availability), each Dispatcher will run its own instance of the monitoring API, which offers information about completed and running job while that Dispatcher was elected the cluster leader.

Developing

The REST API backend is in the flink-runtime project. The core class is org.apache.flink.runtime.webmonitor.WebMonitorEndpoint, which sets up the server and the request routing.

We use Netty and the Netty Router library to handle REST requests and translate URLs. This choice was made because this combination has lightweight dependencies, and the performance of Netty HTTP is very good.

To add new requests, one needs to

add a new MessageHeaders class which serves as an interface for the new request,
add a new AbstractRestHandler class which handles the request according to the added MessageHeaders class,
add the handler to org.apache.flink.runtime.webmonitor.WebMonitorEndpoint#initializeHandlers().

A good example is the org.apache.flink.runtime.rest.handler.job.JobExceptionsHandler that uses the org.apache.flink.runtime.rest.messages.JobExceptionsHeaders.

API

Dispatcher

/cluster
Verb: `DELETE`	Response code: `200 OK`
Shuts down the cluster
`{}`
`{}`

/config
Verb: `GET`	Response code: `200 OK`
Returns the configuration of the WebUI.
`{}`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:DashboardConfiguration", "properties" : { "refresh-interval" : { "type" : "integer" }, "timezone-name" : { "type" : "string" }, "timezone-offset" : { "type" : "integer" }, "flink-version" : { "type" : "string" }, "flink-revision" : { "type" : "string" } } }`

/jars
Verb: `GET`	Response code: `200 OK`
Returns a list of all jars previously uploaded via '/jars/upload'.
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:webmonitor:handlers:JarListInfo", "properties" : { "address" : { "type" : "string" }, "files" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:webmonitor:handlers:JarListInfo:JarFileInfo", "properties" : { "id" : { "type" : "string" }, "name" : { "type" : "string" }, "uploaded" : { "type" : "integer" }, "entry" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:webmonitor:handlers:JarListInfo:JarEntryInfo", "properties" : { "name" : { "type" : "string" }, "description" : { "type" : "string" } } } } } } } } }

/jars/upload
Verb: `POST`	Response code: `200 OK`
Uploads a jar to the cluster. The jar must be sent as multi-part data. Make sure that the "Content-Type" header is set to "application/x-java-archive", as some http libraries do not add the header by default. Using 'curl' you can upload a jar via 'curl -X POST -H "Expect:" -F "jarfile=#path/to/flink-job.jar" http://hostname:port/jars/upload'.
`{}`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:webmonitor:handlers:JarUploadResponseBody", "properties" : { "filename" : { "type" : "string" }, "status" : { "type" : "string", "enum" : [ "success" ] } } }`

/jars/:jarid
Verb: `DELETE`	Response code: `200 OK`
Deletes a jar previously uploaded via '/jars/upload'.
Path parameters
`jarid` - description
`{}`
`{}`

/jars/:jarid/plan
Verb: `GET`	Response code: `200 OK`
Returns the dataflow plan of a job contained in a jar previously uploaded via '/jars/upload'.
Path parameters
`jarid` - description
Query parameters
`entry-class` (optional): description `parallelism` (optional): description `program-args` (optional): description
`{}`
`{ "type" : "any" }`

/jars/:jarid/run
Verb: `POST`	Response code: `200 OK`
Submits a job by running a jar previously uploaded via '/jars/upload'.
Path parameters
`jarid` - description
Query parameters
`program-args` (optional): description `entry-class` (optional): description `parallelism` (optional): description `allowNonRestoredState` (optional): description `savepointPath` (optional): description
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:webmonitor:handlers:JarRunRequestBody", "properties" : { "entryClass" : { "type" : "string" }, "programArgs" : { "type" : "string" }, "parallelism" : { "type" : "integer" }, "allowNonRestoredState" : { "type" : "boolean" }, "savepointPath" : { "type" : "string" } } }`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:webmonitor:handlers:JarRunResponseBody", "properties" : { "jobid" : { "type" : "any" } } }`

/jobmanager/config
Verb: `GET`	Response code: `200 OK`
Returns the cluster configuration.
`{}`
`{ "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:ClusterConfigurationInfoEntry", "properties" : { "key" : { "type" : "string" }, "value" : { "type" : "string" } } } }`

/jobmanager/metrics
Verb: `GET`	Response code: `200 OK`
Provides access to job manager metrics.
Query parameters
`get` (optional): description
`{}`
`{ "type" : "any" }`

/jobs
Verb: `GET`	Response code: `200 OK`
Returns an overview over all jobs and their current state.
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:messages:webmonitor:JobIdsWithStatusOverview", "properties" : { "jobs" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:messages:webmonitor:JobIdsWithStatusOverview:JobIdWithStatus", "properties" : { "id" : { "type" : "any" }, "status" : { "type" : "string", "enum" : [ "CREATED", "RUNNING", "FAILING", "FAILED", "CANCELLING", "CANCELED", "FINISHED", "RESTARTING", "SUSPENDING", "SUSPENDED", "RECONCILING" ] } } } } } }

/jobs
Verb: `POST`	Response code: `202 Accepted`
Submits a job. This call is primarily intended to be used by the Flink client. This call expects amultipart/form-data request that consists of file uploads for the serialized JobGraph, jars anddistributed cache artifacts and an attribute named "request"for the JSON payload.
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:JobSubmitRequestBody", "properties" : { "jobGraphFileName" : { "type" : "string" }, "jobJarFileNames" : { "type" : "array", "items" : { "type" : "string" } } } }`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:JobSubmitResponseBody", "properties" : { "jobUrl" : { "type" : "string" } } }`

/jobs/metrics
Verb: `GET`	Response code: `200 OK`
Provides access to aggregated job metrics.
Query parameters
`get` (optional): description `agg` (optional): description `jobs` (optional): description
`{}`
`{ "type" : "any" }`

/jobs/overview
Verb: `GET`	Response code: `200 OK`
Returns an overview over all jobs.
`{}`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:messages:webmonitor:MultipleJobsDetails", "properties" : { "jobs" : { "type" : "array", "items" : { "type" : "any" } } } }`

/jobs/:jobid
Verb: `GET`	Response code: `200 OK`
Returns details of a job.
Path parameters
`jobid` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:JobDetailsInfo", "properties" : { "jid" : { "type" : "any" }, "name" : { "type" : "string" }, "isStoppable" : { "type" : "boolean" }, "state" : { "type" : "string", "enum" : [ "CREATED", "RUNNING", "FAILING", "FAILED", "CANCELLING", "CANCELED", "FINISHED", "RESTARTING", "SUSPENDING", "SUSPENDED", "RECONCILING" ] }, "start-time" : { "type" : "integer" }, "end-time" : { "type" : "integer" }, "duration" : { "type" : "integer" }, "now" : { "type" : "integer" }, "timestamps" : { "type" : "object", "additionalProperties" : { "type" : "integer" } }, "vertices" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:JobDetailsInfo:JobVertexDetailsInfo", "properties" : { "id" : { "type" : "any" }, "name" : { "type" : "string" }, "parallelism" : { "type" : "integer" }, "status" : { "type" : "string", "enum" : [ "CREATED", "SCHEDULED", "DEPLOYING", "RUNNING", "FINISHED", "CANCELING", "CANCELED", "FAILED", "RECONCILING" ] }, "start-time" : { "type" : "integer" }, "end-time" : { "type" : "integer" }, "duration" : { "type" : "integer" }, "tasks" : { "type" : "object", "additionalProperties" : { "type" : "integer" } }, "metrics" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:metrics:IOMetricsInfo", "properties" : { "read-bytes" : { "type" : "integer" }, "read-bytes-complete" : { "type" : "boolean" }, "write-bytes" : { "type" : "integer" }, "write-bytes-complete" : { "type" : "boolean" }, "read-records" : { "type" : "integer" }, "read-records-complete" : { "type" : "boolean" }, "write-records" : { "type" : "integer" }, "write-records-complete" : { "type" : "boolean" }, "buffers-in-pool-usage-max" : { "type" : "float" }, "buffers-in-pool-usage-max-complete" : { "type" : "boolean" }, "buffers-out-pool-usage-max" : { "type" : "float" }, "buffers-out-pool-usage-max-complete" : { "type" : "boolean" }, "tps" : { "type" : "float" }, "tps-complete" : { "type" : "boolean" }, "delay" : { "type" : "long" }, "delay-complete" : { "type" : "boolean" } } } } }, "status-counts" : { "type" : "object", "additionalProperties" : { "type" : "integer" } }, "plan" : { "type" : "string" } } }

/jobs/:jobid
Verb: `PATCH`	Response code: `202 Accepted`
Terminates a job.
Path parameters
`jobid` - description
Query parameters
`mode` (optional): description
`{}`
`{}`

/jobs/:jobid/accumulators
Verb: `GET`	Response code: `200 OK`
Returns the accumulators for all tasks of a job, aggregated across the respective subtasks.
Path parameters
`jobid` - description
Query parameters
`includeSerializedValue` (optional): description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:JobAccumulatorsInfo", "properties" : { "job-accumulators" : { "type" : "array", "items" : { "type" : "any" } }, "user-task-accumulators" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:JobAccumulatorsInfo:UserTaskAccumulator", "properties" : { "name" : { "type" : "string" }, "type" : { "type" : "string" }, "value" : { "type" : "string" } } } }, "serialized-user-task-accumulators" : { "type" : "object", "additionalProperties" : { "type" : "any" } } } }

/jobs/:jobid/checkpoints
Verb: `GET`	Response code: `200 OK`
Returns checkpointing statistics for a job.
Path parameters
`jobid` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:CheckpointingStatistics", "properties" : { "counts" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:CheckpointingStatistics:Counts", "properties" : { "restored" : { "type" : "integer" }, "total" : { "type" : "integer" }, "in_progress" : { "type" : "integer" }, "completed" : { "type" : "integer" }, "failed" : { "type" : "integer" } } }, "summary" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:CheckpointingStatistics:Summary", "properties" : { "state_size" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:MinMaxAvgStatistics", "properties" : { "min" : { "type" : "integer" }, "max" : { "type" : "integer" }, "avg" : { "type" : "integer" } } }, "end_to_end_duration" : { "type" : "object", "$ref" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:MinMaxAvgStatistics" }, "alignment_buffered" : { "type" : "object", "$ref" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:MinMaxAvgStatistics" } } }, "latest" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:CheckpointingStatistics:LatestCheckpoints", "properties" : { "completed" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:CheckpointStatistics:CompletedCheckpointStatistics", "properties" : { "id" : { "type" : "integer" }, "status" : { "type" : "string", "enum" : [ "IN_PROGRESS", "COMPLETED", "FAILED" ] }, "is_savepoint" : { "type" : "boolean" }, "trigger_timestamp" : { "type" : "integer" }, "latest_ack_timestamp" : { "type" : "integer" }, "state_size" : { "type" : "integer" }, "end_to_end_duration" : { "type" : "integer" }, "alignment_buffered" : { "type" : "integer" }, "num_subtasks" : { "type" : "integer" }, "num_acknowledged_subtasks" : { "type" : "integer" }, "tasks" : { "type" : "object", "additionalProperties" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:TaskCheckpointStatistics", "properties" : { "id" : { "type" : "integer" }, "status" : { "type" : "string", "enum" : [ "IN_PROGRESS", "COMPLETED", "FAILED" ] }, "latest_ack_timestamp" : { "type" : "integer" }, "state_size" : { "type" : "integer" }, "end_to_end_duration" : { "type" : "integer" }, "alignment_buffered" : { "type" : "integer" }, "num_subtasks" : { "type" : "integer" }, "num_acknowledged_subtasks" : { "type" : "integer" } } } }, "external_path" : { "type" : "string" }, "discarded" : { "type" : "boolean" } } }, "savepoint" : { "type" : "object", "$ref" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:CheckpointStatistics:CompletedCheckpointStatistics" }, "failed" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:CheckpointStatistics:FailedCheckpointStatistics", "properties" : { "id" : { "type" : "integer" }, "status" : { "type" : "string", "enum" : [ "IN_PROGRESS", "COMPLETED", "FAILED" ] }, "is_savepoint" : { "type" : "boolean" }, "trigger_timestamp" : { "type" : "integer" }, "latest_ack_timestamp" : { "type" : "integer" }, "state_size" : { "type" : "integer" }, "end_to_end_duration" : { "type" : "integer" }, "alignment_buffered" : { "type" : "integer" }, "num_subtasks" : { "type" : "integer" }, "num_acknowledged_subtasks" : { "type" : "integer" }, "tasks" : { "type" : "object", "additionalProperties" : { "type" : "object", "$ref" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:TaskCheckpointStatistics" } }, "failure_timestamp" : { "type" : "integer" }, "failure_message" : { "type" : "string" } } }, "restored" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:CheckpointingStatistics:RestoredCheckpointStatistics", "properties" : { "id" : { "type" : "integer" }, "restore_timestamp" : { "type" : "integer" }, "is_savepoint" : { "type" : "boolean" }, "external_path" : { "type" : "string" } } } } }, "history" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:CheckpointStatistics", "properties" : { "id" : { "type" : "integer" }, "status" : { "type" : "string", "enum" : [ "IN_PROGRESS", "COMPLETED", "FAILED" ] }, "is_savepoint" : { "type" : "boolean" }, "trigger_timestamp" : { "type" : "integer" }, "latest_ack_timestamp" : { "type" : "integer" }, "state_size" : { "type" : "integer" }, "end_to_end_duration" : { "type" : "integer" }, "alignment_buffered" : { "type" : "integer" }, "num_subtasks" : { "type" : "integer" }, "num_acknowledged_subtasks" : { "type" : "integer" }, "tasks" : { "type" : "object", "additionalProperties" : { "type" : "object", "$ref" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:TaskCheckpointStatistics" } } } } } } }

/jobs/:jobid/checkpoints/config
Verb: `GET`	Response code: `200 OK`
Returns the checkpointing configuration.
Path parameters
`jobid` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:CheckpointConfigInfo", "properties" : { "mode" : { "type" : "any" }, "interval" : { "type" : "integer" }, "timeout" : { "type" : "integer" }, "min_pause" : { "type" : "integer" }, "max_concurrent" : { "type" : "integer" }, "externalization" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:CheckpointConfigInfo:ExternalizedCheckpointInfo", "properties" : { "enabled" : { "type" : "boolean" }, "delete_on_cancellation" : { "type" : "boolean" } } } } }

/jobs/:jobid/checkpoints/details/:checkpointid
Verb: `GET`	Response code: `200 OK`
Returns details for a checkpoint.
Path parameters
`jobid` - description `checkpointid` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:CheckpointStatistics", "properties" : { "id" : { "type" : "integer" }, "status" : { "type" : "string", "enum" : [ "IN_PROGRESS", "COMPLETED", "FAILED" ] }, "is_savepoint" : { "type" : "boolean" }, "trigger_timestamp" : { "type" : "integer" }, "latest_ack_timestamp" : { "type" : "integer" }, "state_size" : { "type" : "integer" }, "end_to_end_duration" : { "type" : "integer" }, "alignment_buffered" : { "type" : "integer" }, "num_subtasks" : { "type" : "integer" }, "num_acknowledged_subtasks" : { "type" : "integer" }, "tasks" : { "type" : "object", "additionalProperties" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:TaskCheckpointStatistics", "properties" : { "id" : { "type" : "integer" }, "status" : { "type" : "string", "enum" : [ "IN_PROGRESS", "COMPLETED", "FAILED" ] }, "latest_ack_timestamp" : { "type" : "integer" }, "state_size" : { "type" : "integer" }, "end_to_end_duration" : { "type" : "integer" }, "alignment_buffered" : { "type" : "integer" }, "num_subtasks" : { "type" : "integer" }, "num_acknowledged_subtasks" : { "type" : "integer" } } } } } }

/jobs/:jobid/checkpoints/details/:checkpointid/subtasks/:vertexid
Verb: `GET`	Response code: `200 OK`
Returns checkpoint statistics for a task and its subtasks.
Path parameters
`jobid` - description `checkpointid` - description `vertexid` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:TaskCheckpointStatisticsWithSubtaskDetails", "properties" : { "id" : { "type" : "integer" }, "status" : { "type" : "string", "enum" : [ "IN_PROGRESS", "COMPLETED", "FAILED" ] }, "latest_ack_timestamp" : { "type" : "integer" }, "state_size" : { "type" : "integer" }, "end_to_end_duration" : { "type" : "integer" }, "alignment_buffered" : { "type" : "integer" }, "num_subtasks" : { "type" : "integer" }, "num_acknowledged_subtasks" : { "type" : "integer" }, "summary" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:TaskCheckpointStatisticsWithSubtaskDetails:Summary", "properties" : { "state_size" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:MinMaxAvgStatistics", "properties" : { "min" : { "type" : "integer" }, "max" : { "type" : "integer" }, "avg" : { "type" : "integer" } } }, "end_to_end_duration" : { "type" : "object", "$ref" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:MinMaxAvgStatistics" }, "checkpoint_duration" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:TaskCheckpointStatisticsWithSubtaskDetails:CheckpointDuration", "properties" : { "sync" : { "type" : "object", "$ref" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:MinMaxAvgStatistics" }, "async" : { "type" : "object", "$ref" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:MinMaxAvgStatistics" } } }, "alignment" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:TaskCheckpointStatisticsWithSubtaskDetails:CheckpointAlignment", "properties" : { "buffered" : { "type" : "object", "$ref" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:MinMaxAvgStatistics" }, "duration" : { "type" : "object", "$ref" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:MinMaxAvgStatistics" } } } } }, "subtasks" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:checkpoints:SubtaskCheckpointStatistics", "properties" : { "index" : { "type" : "integer" }, "status" : { "type" : "string" } } } } } }

/jobs/:jobid/config
Verb: `GET`	Response code: `200 OK`
Returns the configuration of a job.
Path parameters
`jobid` - description
`{}`
`{ "type" : "any" }`

/jobs/:jobid/exceptions
Verb: `GET`	Response code: `200 OK`
Returns the non-recoverable exceptions that have been observed by the job. The truncated flag defines whether more exceptions occurred, but are not listed, because the response would otherwise get too big.
Path parameters
`jobid` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:JobExceptionsInfo", "properties" : { "root-exception" : { "type" : "string" }, "timestamp" : { "type" : "integer" }, "all-exceptions" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:JobExceptionsInfo:ExecutionExceptionInfo", "properties" : { "exception" : { "type" : "string" }, "task" : { "type" : "string" }, "location" : { "type" : "string" }, "timestamp" : { "type" : "integer" } } } }, "truncated" : { "type" : "boolean" } } }

/jobs/:jobid/execution-result
Verb: `GET`	Response code: `200 OK`
Returns the result of a job execution. Gives access to the execution time of the job and to all accumulators created by this job.
Path parameters
`jobid` - description
`{}`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:JobExecutionResultResponseBody", "properties" : { "status" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:queue:QueueStatus", "required" : true, "properties" : { "id" : { "type" : "string", "required" : true, "enum" : [ "IN_PROGRESS", "COMPLETED" ] } } }, "job-execution-result" : { "type" : "any" } } }`

/jobs/:jobid/metrics
Verb: `GET`	Response code: `200 OK`
Provides access to job metrics.
Path parameters
`jobid` - description
Query parameters
`get` (optional): description
`{}`
`{ "type" : "any" }`

/jobs/:jobid/plan
Verb: `GET`	Response code: `200 OK`
Returns the dataflow plan of a job.
Path parameters
`jobid` - description
`{}`
`{ "type" : "any" }`

/jobs/:jobid/vertices/details
Verb: `GET`	Response code: `200 OK`
Returns the detail contains vertices and operators of a job.
Path parameters
`jobid` - description
`{}`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:messages:webmonitor:JobVerticesInfo", "properties" : { "vertices" : { "type" : "array", "items" : { "type" : "any" } }, "operators" : { "type" : "array", "items" : { "type" : "any" } } } }`

/jobs/:jobid/taskmanagers
Verb: `GET`	Response code: `200 OK`
Returns an overview over all registered TaskManagers of a job.
Path parameters
`jobid` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:taskmanager:TaskManagersInfo", "properties" : { "taskmanagers" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:taskmanager:TaskManagerInfo", "properties" : { "id" : { "type" : "any" }, "path" : { "type" : "string" }, "dataPort" : { "type" : "integer" }, "timeSinceLastHeartbeat" : { "type" : "integer" }, "slotsNumber" : { "type" : "integer" }, "freeSlots" : { "type" : "integer" }, "hardware" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:instance:HardwareDescription", "properties" : { "cpuCores" : { "type" : "integer" }, "physicalMemory" : { "type" : "integer" }, "freeMemory" : { "type" : "integer" }, "managedMemory" : { "type" : "integer" } } } } } } } }

/jobs/:jobid/rescaling
Verb: `PATCH`	Response code: `200 OK`
Triggers the rescaling of a job.
Path parameters
`jobid` - description
Query parameters
`parallelism` (mandatory): description
`{}`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:handler:async:TriggerResponse", "properties" : { "request-id" : { "type" : "any" } } }`

/jobs/:jobid/pendingslotrequest
Verb: `GET`	Response code: `200 OK`
Returns pending slot resuests for a job.
Path parameters
`jobid` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:JobPendingSlotRequestsInfo", "properties" : { "taskmanagers" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:JobPendingSlotRequestDetail", "properties" : { "id" : { "type" : "any" }, "resource_profile" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:clusterframework:types:ResourceProfile", "properties" : { "cpuCores" : { "type" : "double" }, "heapMemoryInMB" : { "type" : "integer" }, "directMemoryInMB" : { "type" : "integer" }, "nativeMemoryInMB" : { "type" : "integer" }, "networkMemoryInMB" : { "type" : "integer" }, "extendedResources" : { "type" : "any" } } }, "sharing_id" : { "type" : "any" }, "co-location_id" : { "type" : "any" }, "tasks" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:JobPendingSlotRequestDetail:VertexTaskInfo", "properties" : { "vertex_id" : { "type" : "any" }, "task_name" : { "type" : "string" }, "subtask" : { "type" : "integer" }, "attempt" : { "type" : "integer" } } } } "start_time" : { "type" : "integer" } } } } } }

/jobs/:jobid/rescaling/:triggerid
Verb: `GET`	Response code: `200 OK`
Returns the status of a rescaling operation.
Path parameters
`jobid` - description `triggerid` - description
`{}`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:handler:async:AsynchronousOperationResult", "properties" : { "status" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:queue:QueueStatus", "properties" : { "id" : { "type" : "string", "required" : true, "enum" : [ "IN_PROGRESS", "COMPLETED" ] } } }, "operation" : { "type" : "any" } } }`

/jobs/:jobid/savepoints
Verb: `POST`	Response code: `202 Accepted`
Triggers a savepoint, and optionally cancels the job afterwards.
Path parameters
`jobid` - description
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:savepoints:SavepointTriggerRequestBody", "properties" : { "target-directory" : { "type" : "string" }, "cancel-job" : { "type" : "boolean" } } }`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:handler:async:TriggerResponse", "properties" : { "request-id" : { "type" : "any" } } }`

/jobs/:jobid/savepoints/:triggerid
Verb: `GET`	Response code: `200 OK`
Returns the status of a savepoint operation.
Path parameters
`jobid` - description `triggerid` - description
`{}`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:handler:async:AsynchronousOperationResult", "properties" : { "status" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:queue:QueueStatus", "properties" : { "id" : { "type" : "string", "required" : true, "enum" : [ "IN_PROGRESS", "COMPLETED" ] } } }, "operation" : { "type" : "any" } } }`

/jobs/:jobid/vertices/:vertexid
Verb: `GET`	Response code: `200 OK`
Returns details for a task, with a summary for each of its subtasks.
Path parameters
`jobid` - description `vertexid` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:JobVertexDetailsInfo", "properties" : { "id" : { "type" : "any" }, "name" : { "type" : "string" }, "parallelism" : { "type" : "integer" }, "now" : { "type" : "integer" }, "subtasks" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:JobVertexDetailsInfo:VertexTaskDetail", "properties" : { "subtask" : { "type" : "integer" }, "status" : { "type" : "string", "enum" : [ "CREATED", "SCHEDULED", "DEPLOYING", "RUNNING", "FINISHED", "CANCELING", "CANCELED", "FAILED", "RECONCILING" ] }, "attempt" : { "type" : "integer" }, "host" : { "type" : "string" }, "start_time" : { "type" : "integer" }, "end-time" : { "type" : "integer" }, "duration" : { "type" : "integer" }, "log-file-name" : { "type" : "string" }, "stdout-file-name" : { "type" : "string" }, "metrics" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:metrics:IOMetricsInfo", "properties" : { "read-bytes" : { "type" : "integer" }, "read-bytes-complete" : { "type" : "boolean" }, "write-bytes" : { "type" : "integer" }, "write-bytes-complete" : { "type" : "boolean" }, "read-records" : { "type" : "integer" }, "read-records-complete" : { "type" : "boolean" }, "write-records" : { "type" : "integer" }, "write-records-complete" : { "type" : "boolean" }, "buffers-in-pool-usage-max" : { "type" : "float" }, "buffers-in-pool-usage-max-complete" : { "type" : "boolean" }, "buffers-out-pool-usage-max" : { "type" : "float" }, "buffers-out-pool-usage-max-complete" : { "type" : "boolean" }, "tps" : { "type" : "float" }, "tps-complete" : { "type" : "boolean" }, "delay" : { "type" : "long" }, "delay-complete" : { "type" : "boolean" } } } } } } } }

/jobs/:jobid/vertices/:vertexid/accumulators
Verb: `GET`	Response code: `200 OK`
Returns user-defined accumulators of a task, aggregated across all subtasks.
Path parameters
`jobid` - description `vertexid` - description
`{}`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:JobVertexAccumulatorsInfo", "properties" : { "id" : { "type" : "string" }, "user-accumulators" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:UserAccumulator", "properties" : { "name" : { "type" : "string" }, "type" : { "type" : "string" }, "value" : { "type" : "string" } } } } } }`

/jobs/:jobid/vertices/:vertexid/backpressure
Verb: `GET`	Response code: `200 OK`
Returns back-pressure information for a job, and may initiate back-pressure sampling if necessary.
Path parameters
`jobid` - description `vertexid` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:JobVertexBackPressureInfo", "properties" : { "status" : { "type" : "string", "enum" : [ "deprecated", "ok" ] }, "backpressure-level" : { "type" : "string", "enum" : [ "ok", "low", "high" ] }, "end-timestamp" : { "type" : "integer" }, "subtasks" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:JobVertexBackPressureInfo:SubtaskBackPressureInfo", "properties" : { "subtask" : { "type" : "integer" }, "backpressure-level" : { "type" : "string", "enum" : [ "ok", "low", "high" ] }, "ratio" : { "type" : "number" } } } } } }

/jobs/:jobid/vertices/:vertexid/metrics
Verb: `GET`	Response code: `200 OK`
Provides access to task metrics.
Path parameters
`jobid` - description `vertexid` - description
Query parameters
`get` (optional): description
`{}`
`{ "type" : "any" }`

/jobs/:jobid/vertices/:vertexid/subtasks/accumulators
Verb: `GET`	Response code: `200 OK`
Returns all user-defined accumulators for all subtasks of a task.
Path parameters
`jobid` - description `vertexid` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:SubtasksAllAccumulatorsInfo", "properties" : { "id" : { "type" : "any" }, "parallelism" : { "type" : "integer" }, "subtasks" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:SubtasksAllAccumulatorsInfo:SubtaskAccumulatorsInfo", "properties" : { "subtask" : { "type" : "integer" }, "attempt" : { "type" : "integer" }, "host" : { "type" : "string" }, "user-accumulators" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:UserAccumulator", "properties" : { "name" : { "type" : "string" }, "type" : { "type" : "string" }, "value" : { "type" : "string" } } } } } } } } }

/jobs/:jobid/vertices/:vertexid/subtasks/metrics
Verb: `GET`	Response code: `200 OK`
Provides access to aggregated subtask metrics.
Path parameters
`jobid` - description `vertexid` - description
Query parameters
`get` (optional): description `agg` (optional): description `subtasks` (optional): description
`{}`
`{ "type" : "any" }`

/jobs/:jobid/vertices/:vertexid/subtasks/:subtaskindex
Verb: `GET`	Response code: `200 OK`
Returns details of the current or latest execution attempt of a subtask.
Path parameters
`jobid` - description `vertexid` - description `subtaskindex` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:SubtaskExecutionAttemptDetailsInfo", "properties" : { "subtask" : { "type" : "integer" }, "status" : { "type" : "string", "enum" : [ "CREATED", "SCHEDULED", "DEPLOYING", "RUNNING", "FINISHED", "CANCELING", "CANCELED", "FAILED", "RECONCILING" ] }, "attempt" : { "type" : "integer" }, "host" : { "type" : "string" }, "start-time" : { "type" : "integer" }, "end-time" : { "type" : "integer" }, "duration" : { "type" : "integer" }, "metrics" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:metrics:IOMetricsInfo", "properties" : { "read-bytes" : { "type" : "integer" }, "read-bytes-complete" : { "type" : "boolean" }, "write-bytes" : { "type" : "integer" }, "write-bytes-complete" : { "type" : "boolean" }, "read-records" : { "type" : "integer" }, "read-records-complete" : { "type" : "boolean" }, "write-records" : { "type" : "integer" }, "write-records-complete" : { "type" : "boolean" }, "buffers-in-pool-usage-max" : { "type" : "float" }, "buffers-in-pool-usage-max-complete" : { "type" : "boolean" }, "buffers-out-pool-usage-max" : { "type" : "float" }, "buffers-out-pool-usage-max-complete" : { "type" : "boolean" }, "tps" : { "type" : "float" }, "tps-complete" : { "type" : "boolean" }, "delay" : { "type" : "long" }, "delay-complete" : { "type" : "boolean" } } } }

/jobs/:jobid/vertices/:vertexid/subtasks/:subtaskindex/attempts/:attempt
Verb: `GET`	Response code: `200 OK`
Returns details of an execution attempt of a subtask. Multiple execution attempts happen in case of failure/recovery.
Path parameters
`jobid` - description `vertexid` - description `subtaskindex` - description `attempt` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:SubtaskExecutionAttemptDetailsInfo", "properties" : { "subtask" : { "type" : "integer" }, "status" : { "type" : "string", "enum" : [ "CREATED", "SCHEDULED", "DEPLOYING", "RUNNING", "FINISHED", "CANCELING", "CANCELED", "FAILED", "RECONCILING" ] }, "attempt" : { "type" : "integer" }, "host" : { "type" : "string" }, "start-time" : { "type" : "integer" }, "end-time" : { "type" : "integer" }, "duration" : { "type" : "integer" }, "metrics" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:metrics:IOMetricsInfo", "properties" : { "read-bytes" : { "type" : "integer" }, "read-bytes-complete" : { "type" : "boolean" }, "write-bytes" : { "type" : "integer" }, "write-bytes-complete" : { "type" : "boolean" }, "read-records" : { "type" : "integer" }, "read-records-complete" : { "type" : "boolean" }, "write-records" : { "type" : "integer" }, "write-records-complete" : { "type" : "boolean" }, "buffers-in-pool-usage-max" : { "type" : "float" }, "buffers-in-pool-usage-max-complete" : { "type" : "boolean" }, "buffers-out-pool-usage-max" : { "type" : "float" }, "buffers-out-pool-usage-max-complete" : { "type" : "boolean" }, "tps" : { "type" : "float" }, "tps-complete" : { "type" : "boolean" }, "delay" : { "type" : "long" }, "delay-complete" : { "type" : "boolean" } } } } }

/jobs/:jobid/vertices/:vertexid/subtasks/:subtaskindex/attempts/:attempt/accumulators
Verb: `GET`	Response code: `200 OK`
Returns the accumulators of an execution attempt of a subtask. Multiple execution attempts happen in case of failure/recovery.
Path parameters
`jobid` - description `vertexid` - description `subtaskindex` - description `attempt` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:SubtaskExecutionAttemptAccumulatorsInfo", "properties" : { "subtask" : { "type" : "integer" }, "attempt" : { "type" : "integer" }, "id" : { "type" : "string" }, "user-accumulators" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:UserAccumulator", "properties" : { "name" : { "type" : "string" }, "type" : { "type" : "string" }, "value" : { "type" : "string" } } } } } }

/jobs/:jobid/vertices/:vertexid/subtasks/:subtaskindex/metrics
Verb: `GET`	Response code: `200 OK`
Provides access to subtask metrics.
Path parameters
`jobid` - description `vertexid` - description `subtaskindex` - description
Query parameters
`get` (optional): description
`{}`
`{ "type" : "any" }`

/jobs/:jobid/vertices/:vertexid/subtasktimes
Verb: `GET`	Response code: `200 OK`
Returns time-related information for all subtasks of a task.
Path parameters
`jobid` - description `vertexid` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:SubtasksTimesInfo", "properties" : { "id" : { "type" : "string" }, "name" : { "type" : "string" }, "now" : { "type" : "integer" }, "subtasks" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:SubtasksTimesInfo:SubtaskTimeInfo", "properties" : { "subtask" : { "type" : "integer" }, "host" : { "type" : "string" }, "duration" : { "type" : "integer" }, "timestamps" : { "type" : "object", "additionalProperties" : { "type" : "integer" } } } } } } }

/jobs/:jobid/vertices/:vertexid/taskmanagers
Verb: `GET`	Response code: `200 OK`
Returns task information aggregated by task manager.
Path parameters
`jobid` - description `vertexid` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:JobVertexTaskManagersInfo", "properties" : { "id" : { "type" : "any" }, "name" : { "type" : "string" }, "now" : { "type" : "integer" }, "taskmanagers" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:JobVertexTaskManagersInfo:TaskManagersInfo", "properties" : { "host" : { "type" : "string" }, "status" : { "type" : "string", "enum" : [ "CREATED", "SCHEDULED", "DEPLOYING", "RUNNING", "FINISHED", "CANCELING", "CANCELED", "FAILED", "RECONCILING" ] }, "start-time" : { "type" : "integer" }, "end-time" : { "type" : "integer" }, "duration" : { "type" : "integer" }, "metrics" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:metrics:IOMetricsInfo", "properties" : { "read-bytes" : { "type" : "integer" }, "read-bytes-complete" : { "type" : "boolean" }, "write-bytes" : { "type" : "integer" }, "write-bytes-complete" : { "type" : "boolean" }, "read-records" : { "type" : "integer" }, "read-records-complete" : { "type" : "boolean" }, "write-records" : { "type" : "integer" }, "write-records-complete" : { "type" : "boolean" }, "buffers-in-pool-usage-max" : { "type" : "float" }, "buffers-in-pool-usage-max-complete" : { "type" : "boolean" }, "buffers-out-pool-usage-max" : { "type" : "float" }, "buffers-out-pool-usage-max-complete" : { "type" : "boolean" }, "tps" : { "type" : "float" }, "tps-complete" : { "type" : "boolean" }, "delay" : { "type" : "long" }, "delay-complete" : { "type" : "boolean" } } }, "status-counts" : { "type" : "object", "additionalProperties" : { "type" : "integer" } } } } } } }

/jobs/:jobid/vertices/::vertexid/subtasks/:subtaskindex/attempts
Verb: `GET`	Response code: `200 OK`
Request handler providing details about all execution attempts of a subtask.
Path parameters
`jobid` - description `vertexid` - description `subtaskindex` - description
`{}`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:messages:webmonitor:SubtaskExecutionAllAttemptsInfo", "properties" : { "attempts" : { "type" : "array", "items" : { "type" : "any" } } } } }`

/overview
Verb: `GET`	Response code: `200 OK`
Returns an overview over the Flink cluster.
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:handler:legacy:messages:ClusterOverviewWithVersion", "properties" : { "taskmanagers" : { "type" : "integer" }, "slots-total" : { "type" : "integer" }, "slots-available" : { "type" : "integer" }, "jobs-running" : { "type" : "integer" }, "jobs-finished" : { "type" : "integer" }, "jobs-cancelled" : { "type" : "integer" }, "jobs-failed" : { "type" : "integer" }, "flink-version" : { "type" : "string" }, "flink-commit" : { "type" : "string" } } }

/savepoint-disposal
Verb: `POST`	Response code: `200 OK`
Triggers the desposal of a savepoint.
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:job:savepoints:SavepointDisposalRequest", "properties" : { "savepoint-path" : { "type" : "string" } } }`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:handler:async:TriggerResponse", "properties" : { "request-id" : { "type" : "any" } } }`

/savepoint-disposal/:triggerid
Verb: `GET`	Response code: `200 OK`
Returns the status of a savepoint disposal operation.
Path parameters
`triggerid` - description
`{}`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:handler:async:AsynchronousOperationResult", "properties" : { "status" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:queue:QueueStatus", "properties" : { "id" : { "type" : "string", "required" : true, "enum" : [ "IN_PROGRESS", "COMPLETED" ] } } }, "operation" : { "type" : "any" } } }`

/taskmanagers
Verb: `GET`	Response code: `200 OK`
Returns an overview over all task managers.
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:taskmanager:TaskManagersInfo", "properties" : { "taskmanagers" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:taskmanager:TaskManagerInfo", "properties" : { "id" : { "type" : "any" }, "path" : { "type" : "string" }, "dataPort" : { "type" : "integer" }, "timeSinceLastHeartbeat" : { "type" : "integer" }, "slotsNumber" : { "type" : "integer" }, "freeSlots" : { "type" : "integer" }, "hardware" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:instance:HardwareDescription", "properties" : { "cpuCores" : { "type" : "integer" }, "physicalMemory" : { "type" : "integer" }, "freeMemory" : { "type" : "integer" }, "managedMemory" : { "type" : "integer" } } } } } } } }

/taskmanagers/metrics
Verb: `GET`	Response code: `200 OK`
Provides access to aggregated task manager metrics.
Query parameters
`get` (optional): description `agg` (optional): description `taskmanagers` (optional): description
`{}`
`{ "type" : "any" }`

/taskmanagers/:taskmanagerid
Verb: `GET`	Response code: `200 OK`
Returns details for a task manager.
Path parameters
`taskmanagerid` - description
`{}`
{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:taskmanager:TaskManagerDetailsInfo", "properties" : { "id" : { "type" : "any" }, "path" : { "type" : "string" }, "dataPort" : { "type" : "integer" }, "timeSinceLastHeartbeat" : { "type" : "integer" }, "slotsNumber" : { "type" : "integer" }, "freeSlots" : { "type" : "integer" }, "hardware" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:instance:HardwareDescription", "properties" : { "cpuCores" : { "type" : "integer" }, "physicalMemory" : { "type" : "integer" }, "freeMemory" : { "type" : "integer" }, "managedMemory" : { "type" : "integer" } } }, "metrics" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:taskmanager:TaskManagerMetricsInfo", "properties" : { "heapUsed" : { "type" : "integer" }, "heapCommitted" : { "type" : "integer" }, "heapMax" : { "type" : "integer" }, "nonHeapUsed" : { "type" : "integer" }, "nonHeapCommitted" : { "type" : "integer" }, "nonHeapMax" : { "type" : "integer" }, "directCount" : { "type" : "integer" }, "directUsed" : { "type" : "integer" }, "directMax" : { "type" : "integer" }, "mappedCount" : { "type" : "integer" }, "mappedUsed" : { "type" : "integer" }, "mappedMax" : { "type" : "integer" }, "memorySegmentsAvailable" : { "type" : "integer" }, "memorySegmentsTotal" : { "type" : "integer" }, "garbageCollectors" : { "type" : "array", "items" : { "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:rest:messages:taskmanager:TaskManagerMetricsInfo:GarbageCollectorInfo", "properties" : { "name" : { "type" : "string" }, "count" : { "type" : "integer" }, "time" : { "type" : "integer" } } } } } } } }

/taskmanagers/:taskmanagerid/metrics
Verb: `GET`	Response code: `200 OK`
Provides access to task manager metrics.
Path parameters
`taskmanagerid` - description
Query parameters
`get` (optional): description
`{}`
`{ "type" : "any" }`

/taskmanagers/:taskmanagerid/log/:filename?start={start}&count={count}
Verb: `GET`	Response code: `200 OK`
Returns file content and length of a file in taskmanager log dir.
Path parameters
`taskmanagerid` - description `filename` - description
Query parameters
`start` - description file read start postion `count` - description file read size
`{}`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:messages:webmonitor:LogDetail", "properties" : { "data" : { "type" : "string" }, "data" : { "file_size" : "Long", } } } } }`

/taskmanagers/:taskmanagerid/logs
Verb: `GET`	Response code: `200 OK`
Returns file list in log dir of a taskmanager.
Path parameters
`taskmanagerid` - description
`{}`
`{ "type" : "object", "id" : "urn:jsonschema:org:apache:flink:runtime:messages:webmonitor:LogsInfo", "properties" : { "logs" : { "type" : "array", "items" : { "type" : "any" } } } } }`

Legacy

This section is only relevant if the cluster runs in legacy mode.

Below is a list of available requests, with a sample JSON response. All requests are of the sample form http://hostname:8081/jobs, below we list only the path part of the URLs.

Values in angle brackets are variables, for example http://hostname:8081/jobs/<jobid>/exceptions will have to requested for example as http://hostname:8081/jobs/7684be6004e4e955c2a558a9bc463f65/exceptions.

/config
/overview
/jobs/overview
/jobs/<jobid>
/jobs/<jobid>/vertices
/jobs/<jobid>/config
/jobs/<jobid>/exceptions
/jobs/<jobid>/accumulators
/jobs/<jobid>/vertices/<vertexid>
/jobs/<jobid>/vertices/<vertexid>/subtasktimes
/jobs/<jobid>/vertices/<vertexid>/taskmanagers
/jobs/<jobid>/vertices/<vertexid>/accumulators
/jobs/<jobid>/vertices/<vertexid>/subtasks/accumulators
/jobs/<jobid>/vertices/<vertexid>/subtasks/<subtasknum>
/jobs/<jobid>/vertices/<vertexid>/subtasks/<subtasknum>/attempts/<attempt>
/jobs/<jobid>/vertices/<vertexid>/subtasks/<subtasknum>/attempts/<attempt>/accumulators
/jobs/<jobid>/plan
/jars/upload
/jars
/jars/:jarid
/jars/:jarid/plan
/jars/:jarid/run

General

/config

Some information about the monitoring API and the server setup.

Sample Result:

{
  "refresh-interval": 3000,
  "timezone-offset": 3600000,
  "timezone-name": "Central European Time",
  "flink-version": "1.5.1",
  "flink-revision": "8124545 @ 16.09.2015 @ 15:38:42 CEST"
}

/overview

Simple summary of the Flink cluster status.

Sample Result:

{
  "taskmanagers": 17,
  "slots-total": 68,
  "slots-available": 68,
  "jobs-running": 0,
  "jobs-finished": 3,
  "jobs-cancelled": 1,
  "jobs-failed": 0
}

Overview of Jobs

/jobs/overview

Jobs, grouped by status, each with a small summary of its status.

Sample Result:

{
  "jobs":[
    {
      "jid": "7684be6004e4e955c2a558a9bc463f65",
      "name": "Flink Java Job at Wed Sep 16 18:08:21 CEST 2015",
      "state": "FINISHED",
      "start-time": 1442419702857,
      "end-time": 1442419975312,
      "duration":272455,
      "last-modification": 1442419975312,
      "tasks": {
         "total": 6,
         "pending": 0,
         "running": 0,
         "finished": 6,
         "canceling": 0,
         "canceled": 0,
         "failed": 0
      }
    },
    {
      "jid": "49306f94d0920216b636e8dd503a6409",
      "name": "Flink Java Job at Wed Sep 16 18:16:39 CEST 2015",
      ...
    }]
}

Details of a Running or Completed Job

/jobs/<jobid>

Summary of one job, listing dataflow plan, status, timestamps of state transitions, aggregate information for each vertex (operator).

Sample Result:

{
  "jid": "ab78dcdbb1db025539e30217ec54ee16",
  "name": "WordCount Example",
  "state":"FINISHED",
  "start-time":1442421277536,
  "end-time":1442421299791,
  "duration":22255,
  "now":1442421991768,
  "timestamps": {
    "CREATED": 1442421277536, "RUNNING": 1442421277609, "FAILING": 0, "FAILED": 0, "CANCELLING": 0, "CANCELED": 0, "FINISHED": 1442421299791, "RESTARTING": 0
  },
  "vertices": [ {
    "id": "19b5b24062c48a06e4eac65422ac3317",
    "name": "CHAIN DataSource (at getTextDataSet(WordCount.java:142) ...",
    "parallelism": 2,
    "status": "FINISHED",
    "start-time": 1442421277609,
    "end-time": 1442421299469,
    "duration": 21860,
    "tasks": {
      "CREATED": 0, "SCHEDULED": 0, "DEPLOYING": 0, "RUNNING": 0, "FINISHED": 2, "CANCELING": 0, "CANCELED": 0, "FAILED": 0
    },
    "metrics": {
      "read-bytes": 0, "write-bytes": 37098, "read-records": 0, "write-records": 3312
    }
  }, {
    "id": "f00c89b349b5c998cfd9fe2a06e50fd0",
    "name":"Reduce (SUM(1), at main(WordCount.java:67)",
    "parallelism": 2,
    ....
  }, {
    "id": "0a36cbc29102d7bc993d0a9bf23afa12",
    "name": "DataSink (CsvOutputFormat (path: /tmp/abzs, delimiter:  ))",
    ...
  } ],
  "status-counts": {
    "CREATED": 0, "SCHEDULED": 0, "DEPLOYING": 0, "RUNNING": 0, "FINISHED": 3, "CANCELING": 0, "CANCELED": 0, "FAILED": 0
  },
  "plan": {
    // see plan details below
  }
}

/jobs/<jobid>/vertices

Currently the same as /jobs/<jobid>

/jobs/<jobid>/config

The user-defined execution config used by the job.

Sample Result:

{
  "jid": "ab78dcdbb1db025539e30217ec54ee16",
  "name": "WordCount Example",
  "execution-config": {
    "execution-mode": "PIPELINED",
    "restart-strategy": "Restart deactivated",
    "job-parallelism": -1,
    "object-reuse-mode": false
  }
}

/jobs/<jobid>/exceptions

The non-recoverable exceptions that have been observed by the job. The truncated flag defines whether more exceptions occurred, but are not listed, because the response would otherwise get too big.

Sample Result:

{
  "root-exception": "java.io.IOException: File already exists:/tmp/abzs/2\n\tat org.apache.flink.core.fs.local.LocalFileSystem. ...",
  "all-exceptions": [ {
    "exception": "java.io.IOException: File already exists:/tmp/abzs/1\n\tat org.apache.flink...",
    "task": "DataSink (CsvOutputFormat (path: /tmp/abzs, delimiter:  )) (1/2)",
    "location": "localhost:49220"
  }, {
    "exception": "java.io.IOException: File already exists:/tmp/abzs/2\n\tat org.apache.flink...",
    "task": "DataSink (CsvOutputFormat (path: /tmp/abzs, delimiter:  )) (2/2)",
    "location": "localhost:49220"
  } ],
  "truncated":false
}

/jobs/<jobid>/accumulators

The aggregated user accumulators plus job accumulators.

Sample Result:

{
  "job-accumulators":[],
  "user-task-accumulators": [ {
    "name": "avglen",
    "type": "DoubleCounter",
    "value": "DoubleCounter 61.5162972"
  },
  {
    "name": "genwords",
    "type": "LongCounter",
    "value": "LongCounter 37500000"
  } ]
}

/jobs/<jobid>/vertices/<vertexid>

Information about one specific vertex, with a summary for each of its subtasks.

Sample Result:

{
  "id": "dceafe2df1f57a1206fcb907cb38ad97",
  "name": "CHAIN DataSource -> Map -> FlatMap -> Combine(SUM(1))",
  "parallelism": 2,
  "now": 1442424002154,
  "subtasks": [ {
    "subtask":0,
    "status": "FINISHED",
    "attempt": 0,
    "host": "localhost",
    "start-time": 1442421093762,
    "end-time": 1442421386680,
    "duration": 292918,
    "metrics": {
      "read-bytes": 0, "write-bytes": 12684375, "read-records": 0, "write-records": 1153125
    }
  }, {
    "subtask": 1,
    "status": "FINISHED",
    "attempt": 0,
    "host": "localhost",
    "start-time": 1442421093774,
    "end-time": 1442421386267,
    "duration": 292493,
    "metrics": {
      "read-bytes": 0, "write-bytes": 12684375, "read-records": 0, "write-records": 1153125
    }
  } ]
}

/jobs/<jobid>/vertices/<vertexid>/subtasktimes

This request returns the timestamps for the state transitions of all subtasks of a given vertex. These can be used, for example, to create time-line comparisons between subtasks.

Sample Result:

{
  "id": "dceafe2df1f57a1206fcb907cb38ad97",
  "name": "CHAIN DataSource -> Map -> Combine(SUM(1))",
  "now":1442423745088,
  "subtasks": [ {
    "subtask": 0,
    "host": "localhost",
    "duration": 292924,
    "timestamps": {
      "CREATED": 1442421093741, "SCHEDULED": 1442421093756, "DEPLOYING": 1442421093762, "RUNNING": 1442421094026, "FINISHED": 1442421386680, "CANCELING": 0, "CANCELED": 0, "FAILED": 0
    }
  }, {
    "subtask": 1,
    "host": "localhost",
    "duration": 292494,
    "timestamps": {
      "CREATED": 1442421093741, "SCHEDULED": 1442421093773, "DEPLOYING": 1442421093774, "RUNNING": 1442421094013, "FINISHED": 1442421386267, "CANCELING": 0, "CANCELED": 0, "FAILED": 0
    }
  } ]
}

/jobs/<jobid>/vertices/<vertexid>/taskmanagers

TaskManager statistics for one specific vertex. This is an aggregation of subtask statistics returned by /jobs/<jobid>/vertices/<vertexid>.

Sample Result:

{
  "id": "fe20bcc29b87cdc76589ca42114c2499",
  "name": "Reduce (SUM(1), at main(WordCount.java:72)",
  "now": 1454348282653,
  "taskmanagers": [ {
    "host": "ip-10-0-43-227:35413",
    "status": "FINISHED",
    "start-time": 1454347870991,
    "end-time": 1454347872111,
    "duration": 1120,
    "metrics": {
      "read-bytes": 32503056, "write-bytes": 9637041, "read-records": 2906087, "write-records": 849467
    },
    "status-counts": {
      "CREATED": 0, "SCHEDULED": 0, "DEPLOYING": 0, "RUNNING": 0, "FINISHED": 18, "CANCELING": 0, "CANCELED": 0, "FAILED": 0
    }
  },{
    "host": "ip-10-0-43-227:41486",
    "status": "FINISHED",
    "start-time": 1454347871001,
    "end-time": 1454347872395,
    "duration": 1394,
    "metrics": {
      "read-bytes": 32389499, "write-bytes": 9608829, "read-records": 2895999, "write-records": 846948
    },
    "status-counts": {
      "CREATED": 0, "SCHEDULED": 0, "DEPLOYING": 0, "RUNNING": 0, "FINISHED": 18, "CANCELING": 0, "CANCELED": 0, "FAILED": 0
    }
  } ]
}

/jobs/<jobid>/vertices/<vertexid>/accumulators

The aggregated user-defined accumulators, for a specific vertex.

Sample Result:

{
  "id": "dceafe2df1f57a1206fcb907cb38ad97",
  "user-accumulators": [ {
    "name": "avglen", "type": "DoubleCounter", "value": "DoubleCounter 123.03259440000001"
  }, {
    "name": "genwords", "type": "LongCounter", "value": "LongCounter 75000000"
  } ]
}

/jobs/<jobid>/vertices/<vertexid>/subtasks/accumulators

Gets all user-defined accumulators for all subtasks of a given vertex. These are the individual accumulators that are returned in aggregated form by the request /jobs/<jobid>/vertices/<vertexid>/accumulators.

Sample Result:

{
  "id": "dceafe2df1f57a1206fcb907cb38ad97",
  "parallelism": 2,
  "subtasks": [ {
    "subtask": 0,
    "attempt": 0,
    "host": "localhost",
    "user-accumulators": [ {
      "name": "genwords", "type": "LongCounter", "value": "LongCounter 62500000"
    }, {
      "name": "genletters", "type": "LongCounter", "value": "LongCounter 1281589525"
    } ]
  }, {
    "subtask": 1,
    "attempt": 0,
    "host": "localhost",
    "user-accumulators": [ {
      "name": "genwords", "type": "LongCounter", "value": "LongCounter 12500000"
    }, {
      "name": "genletters", "type": "LongCounter", "value": "LongCounter 256317905"
    } ]
  } ]
}

/jobs/<jobid>/vertices/<vertexid>/subtasks/<subtasknum>

Summary of the current or latest execution attempt of a specific subtask. See below for a sample.

/jobs/<jobid>/vertices/<vertexid>/subtasks/<subtasknum>/attempts/<attempt>

Summary of a specific execution attempt of a specific subtask. Multiple execution attempts happen in case of failure/recovery.

Sample Result:

{
  "subtask": 0,
  "status": "FINISHED",
  "attempt": 0,
  "host": "localhost",
  "start-time": 1442421093762,
  "end-time": 1442421386680,
  "duration": 292918,
  "metrics": {
    "read-bytes": 0, "write-bytes": 12684375, "read-records": 0, "write-records": 1153125
  }
}

/jobs/<jobid>/vertices/<vertexid>/subtasks/<subtasknum>/attempts/<attempt>/accumulators

The accumulators collected for one specific subtask during one specific execution attempt (multiple attempts happen in case of failure/recovery).

Sample Result:

{
  "subtask": 0,
  "attempt": 0,
  "id": "b22f94d91bf41ddb",
  "user-accumulators": [ {
    "name": "genwords", "type":"LongCounter", "value":"LongCounter 62500000"
  }, {
    "name": "genletters", "type": "LongCounter", "value": "LongCounter 1281589525"
  }, {
  "name": "avglen", "type": "DoubleCounter", "value": "DoubleCounter 102.527162"
  } ]
}

/jobs/<jobid>/plan

The dataflow plan of a job. The plan is also included in the job summary (/jobs/<jobid>).

Sample Result:

{
  "jid":"ab78dcdbb1db025539e30217ec54ee16",
  "name":"WordCount Example",
  "nodes": [ {
    "id": "f00c89b349b5c998cfd9fe2a06e50fd0",
    "parallelism": 2,
    "operator": "GroupReduce",
    "operator_strategy": "Sorted Group Reduce",
    "description": "Reduce (SUM(1), at main(WordCount.java:67)",
    "inputs": [ {
      "num": 0,
      "id":"19b5b24062c48a06e4eac65422ac3317",
      "ship_strategy": "Hash Partition on [0]",
      "local_strategy":"Sort (combining) on [0:ASC]",
      "exchange":"pipelined"
    } ],
    "optimizer_properties": {
      "global_properties": [
        { "name":"Partitioning", "value":"HASH_PARTITIONED" },
        { "name":"Partitioned on", "value":"[0]" },
        { "name":"Partitioning Order", "value":"(none)" },
        { "name":"Uniqueness", "value":"not unique" }
      ],
      "local_properties": [
        { "name":"Order", "value":"[0:ASC]" },
        { "name":"Grouped on", "value":"[0]" },
        { "name":"Uniqueness", "value":"not unique" }
      ],
      "estimates": [
        { "name":"Est. Output Size", "value":"(unknown)" },
        { "name":"Est. Cardinality", "value":"(unknown)" }
      ],
      "costs": [
        { "name":"Network", "value":"(unknown)" },
        { "name":"Disk I/O", "value":"(unknown)" },
        { "name":"CPU", "value":"(unknown)" },
        { "name":"Cumulative Network", "value":"(unknown)" },
        { "name":"Cumulative Disk I/O", "value":"(unknown)" },
        { "name":"Cumulative CPU","value":"(unknown)" }
      ],
      "compiler_hints": [
        { "name":"Output Size (bytes)", "value":"(none)" },
        { "name":"Output Cardinality", "value":"(none)" },
        { "name":"Avg. Output Record Size (bytes)", "value":"(none)" },
        { "name":"Filter Factor", "value":"(none)" }
      ]
    }
  },
  {
    "id": "19b5b24062c48a06e4eac65422ac3317",
    "parallelism": 2,
    "operator": "Data Source -> FlatMap -> GroupCombine",
    "operator_strategy":" (none) -> FlatMap -> Sorted Combine",
    "description":"DataSource (at getTextDataSet(WordCount.java:142) (org.apache.flink.api.java.io.TextInputFormat)) -> FlatMap (FlatMap at main(WordCount.java:67)) -> Combine(SUM(1), at main(WordCount.java:67)",
    "optimizer_properties": {
      ...
    }
  },
  {
    "id": "0a36cbc29102d7bc993d0a9bf23afa12",
    "parallelism": 2,
    "operator": "Data Sink",
    "operator_strategy": "(none)",
    "description": "DataSink (CsvOutputFormat (path: /tmp/abzs, delimiter:  ))",
    "inputs":[ {
      "num": 0,
      "id": "f00c89b349b5c998cfd9fe2a06e50fd0",
      "ship_strategy": "Forward",
      "exchange": "pipelined"
    } ],
    "optimizer_properties": {
      ...
    }
  } ]
}

Job Cancellation

Cancel Job

DELETE request to /jobs/:jobid/cancel.

Triggers job cancellation, result on success is {}.

Cancel Job with Savepoint

Triggers a savepoint and cancels the job after the savepoint succeeds.

GET request to /jobs/:jobid/cancel-with-savepoint/ triggers a savepoint to the default savepoint directory and cancels the job.

GET request to /jobs/:jobid/cancel-with-savepoint/target-directory/:targetDirectory triggers a savepoint to the given target directory and cancels the job.

Since savepoints can take some time to complete this operation happens asynchronously. The result to this request is the location of the in-progress cancellation.

Sample Trigger Result:

{
  "status": "accepted",
  "request-id": 1,
  "location": "/jobs/:jobid/cancel-with-savepoint/in-progress/1"
}

Monitoring Progress

The progress of the cancellation has to be monitored by the user at

/jobs/:jobid/cancel-with-savepoint/in-progress/:requestId

The request ID is returned by the trigger result.

In-Progress

{
  "status": "in-progress",
  "request-id": 1
}

Success

{
  "status": "success",
  "request-id": 1,
  "savepoint-path": "<savepointPath>"
}

The savepointPath points to the external path of the savepoint, which can be used to resume the savepoint.

Failed

{
  "status": "failed",
  "request-id": 1,
  "cause": "<error message>"
}

Submitting Programs

It is possible to upload, run, and list Flink programs via the REST APIs and web frontend.

Upload a new JAR file

Send a POST request to /jars/upload with your jar file sent as multi-part data under the jarfile file. Also make sure that the multi-part data includes the Content-Type of the file itself, some http libraries do not add the header by default.

The multi-part payload should start like

------BoundaryXXXX
Content-Disposition: form-data; name="jarfile"; filename="YourFileName.jar"
Content-Type: application/x-java-archive

Run a Program (POST)

Send a POST request to /jars/:jarid/run. The jarid parameter is the file name of the program JAR in the configured web frontend upload directory (configuration key jobmanager.web.upload.dir).

You can specify the following query parameters (all optional):

Program arguments: program-args=arg1 arg2 arg3
Main class to execute: entry-class=EntryClassName.class
Default parallelism: parallelism=4
Savepoint path to restore from: savepointPath=hdfs://path/to/savepoint
Allow non restored state: allowNonRestoredState=true

If the call succeeds, you will get a response with the ID of the submitted job.

Example: Run program with a savepoint

Request:

POST: /jars/MyProgram.jar/run?savepointPath=/my-savepoints/savepoint-1bae02a80464&allowNonRestoredState=true

Response:

{"jobid": "869a9868d49c679e7355700e0857af85"}