[jira] [Created] (FLINK-25888) Capture time that the job spends on deploying tasks

["Chesnay Schepler (Jira)" <ji...@apache.org>]

Chesnay Schepler created FLINK-25888:
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             Summary: Capture time that the job spends on deploying tasks
                 Key: FLINK-25888
                 URL: https://issues.apache.org/jira/browse/FLINK-25888
             Project: Flink
          Issue Type: New Feature
          Components: Runtime / Coordination, Runtime / Metrics
            Reporter: Chesnay Schepler
            Assignee: Chesnay Schepler
             Fix For: 1.15.0


FLINK-23976 added standardized metrics for capturing how much time we spend in each {{JobStatus}}. However, certain states in practice consist of several stages; for example the RUNNING state also includes the deployment of tasks.

To get a better picture on where time is spent I propose to add new metrics that capture the deployingTime based on the execution states. This will additionally get us closer to a proper uptime metric, which ideally will be runningTime - various stage time metrics.

A job is considered to be deploying,
* for batch jobs, if no task is running and at least one task is being deployed
* for streaming jobs, if at least one task is being deployed

The semantics are different for batch/streaming jobs because they differ in terms of how they make progress. For a streaming job all tasks need to be deployed for checkpointing to make work. For batch jobs any deployed task immediately starts progressing the job.



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