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https://issues.apache.org/jira/browse/BEAM-8962?focusedWorklogId=359480&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-359480
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ASF GitHub Bot logged work on BEAM-8962:
----------------------------------------
Author: ASF GitHub Bot
Created on: 13/Dec/19 16:12
Start Date: 13/Dec/19 16:12
Worklog Time Spent: 10m
Work Description: mxm commented on pull request #10381: [BEAM-8962] Add
option to disable the metric container accumulator
URL: https://github.com/apache/beam/pull/10381
The FlinkMetricContainer wraps the Beam metric container for reporting
metrics,
but also stores them as Flink accumulators. With high parallelism jobs with
over
a thousand tasks and many built-in Beam metrics for every Beam step, this can
accumulate to over 100MB of serialized data which is stored in the
JobManager's
ExecutionGraph. This then fails to even sent over the wire, due to the
akka.framesize limit (10MB by default), and manifests in {{500 Internal
Server
Error}}s in the web frontend.
This introduces an option to disable the reporting via accumulators. The
accumulator is mostly useful for batch workloads where you can retrieve the
final accumulator values at the end of the job. It adds a lot of memory and
network overhead.
In the future, we might disable it by default on streaming workloads.
Post-Commit Tests Status (on master branch)
------------------------------------------------------------------------------------------------
Lang | SDK | Apex | Dataflow | Flink | Gearpump | Samza | Spark
--- | --- | --- | --- | --- | --- | --- | ---
Go | [](https://builds.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/)
| --- | --- | [](https://builds.apache.org/job/beam_PostCommit_Go_VR_Flink/lastCompletedBuild/)
| --- | --- | [](https://builds.apache.org/job/beam_PostCommit_Go_VR_Spark/lastCompletedBuild/)
Java | [](https://builds.apache.org/job/beam_PostCommit_Java/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Apex/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Dataflow/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Flink/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_PVR_Flink_Batch/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_PVR_Flink_Streaming/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Gearpump/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Samza/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Spark/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_PVR_Spark_Batch/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Java_ValidatesRunner_SparkStructuredStreaming/lastCompletedBuild/)
Python | [](https://builds.apache.org/job/beam_PostCommit_Python2/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Python35/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Python36/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Python37/lastCompletedBuild/)
| --- | [](https://builds.apache.org/job/beam_PostCommit_Py_VR_Dataflow/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Py_ValCont/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PreCommit_Python2_PVR_Flink_Cron/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PostCommit_Python35_VR_Flink/lastCompletedBuild/)
| --- | --- | [](https://builds.apache.org/job/beam_PostCommit_Python_VR_Spark/lastCompletedBuild/)
XLang | --- | --- | --- | [](https://builds.apache.org/job/beam_PostCommit_XVR_Flink/lastCompletedBuild/)
| --- | --- | ---
Pre-Commit Tests Status (on master branch)
------------------------------------------------------------------------------------------------
--- |Java | Python | Go | Website
--- | --- | --- | --- | ---
Non-portable | [](https://builds.apache.org/job/beam_PreCommit_Java_Cron/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PreCommit_Python_Cron/lastCompletedBuild/)<br>[](https://builds.apache.org/job/beam_PreCommit_PythonLint_Cron/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PreCommit_Go_Cron/lastCompletedBuild/)
| [](https://builds.apache.org/job/beam_PreCommit_Website_Cron/lastCompletedBuild/)
Portable | --- | [](https://builds.apache.org/job/beam_PreCommit_Portable_Python_Cron/lastCompletedBuild/)
| --- | ---
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Issue Time Tracking
-------------------
Worklog Id: (was: 359480)
Remaining Estimate: 0h
Time Spent: 10m
> FlinkMetricContainer causes churn in the JobManager and lets the web frontend
> malfunction
> -----------------------------------------------------------------------------------------
>
> Key: BEAM-8962
> URL: https://issues.apache.org/jira/browse/BEAM-8962
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Reporter: Maximilian Michels
> Assignee: Maximilian Michels
> Priority: Major
> Fix For: 2.19.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The {{FlinkMetricContainer}} wraps the Beam metric container for reporting
> metrics, but also stores them as Flink accumulators. With high parallelism
> jobs with over a thousand tasks and many built-in Beam metrics for every Beam
> step, this can accumulate to over 100MB of serialized data which is stored in
> the JobManager's ExecutionGraph. This then fails to even sent over the wire,
> due to the akka.framesize limit (10MB by default), and manifests in {{500
> Internal Server Error}}s in the web frontend.
> We need to introduce an option to disable the reporting via accumulators. It
> is mostly useful for batch workloads where you can retrieve the final
> accumulator values at the end of the job. It adds a lot of memory and network
> overhead.
> Perhaps we could even turn off the accumulators for streaming jobs, or
> entirely and make them opt-in.
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