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Posted to issues@beam.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2022/01/31 15:03:00 UTC
[jira] [Work logged] (BEAM-12792) Multiple jobs running on Flink session cluster reuse the persistent Python environment.
[ https://issues.apache.org/jira/browse/BEAM-12792?focusedWorklogId=717966&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-717966 ]
ASF GitHub Bot logged work on BEAM-12792:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 31/Jan/22 15:02
Start Date: 31/Jan/22 15:02
Worklog Time Spent: 10m
Work Description: phoerious opened a new pull request #16658:
URL: https://github.com/apache/beam/pull/16658
The change allows users to submit multiple pipelines to the same SDK container without dependency conflicts. Dependencies in --setup_only mode are still installed globally.
At the moment, this is more of a draft and needs further inspection by someone more knowledgeable about the SDK container plumbing, since there are still a few life cycle issues.
With this patch, the deployment cycle looks like this:
1. Worker pool is spawned (PID 1 in SDK container => worker pool ID = `1`).
2. Flink starts a job and a worker gets spun up with ID `1-1`.
3. The worker creates a temporary venv in `/tmp/beam-venv/beam-pool-1` and deploys the artifact with dependencies.
4. Processing happens ...
5. Everything is cleaned up and a new job can be submitted.
Main problems: I don't get a job ID from the provision info (only a name), so I cannot namespace the venv properly and `multiProcessExactlyOnce()` is bound to the entire worker pool life cycle. Hence, for 5. to work, I had to relax `multiProcessExactlyOnce()` to clean up its completion file after all child processes have finished.
Obvious problem with that: If a second worker process is submitted to the pool later on, whoever finishes first will clean up the resources without knowledge of any other workers that may still be running. If that worker is for another concurrent job, the venv dependencies will conflict (as before), since the venv is global to the entire pool.
Now I don't know if and how any of this can happen. The `boot` binary seems to take care of spawning sibling workers from the same parent worker process, but from the looks of it, `worker_pool_main.py` might spawn yet another worker at any time.
Part of a solution would be to bind the artifact deployment to a job ID (which I don't have), but then I'd still need to know when it is safe to do the cleanup.
BTW Is it intended that the Go code is indented with tabs???!
R: @tvalentyn
------------------------
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`ValidatesRunner` compliance status (on master branch)
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<th>Lang</th>
<th>ULR</th>
<th>Dataflow</th>
<th>Flink</th>
<th>Samza</th>
<th>Spark</th>
<th>Twister2</th>
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Java_ValidatesRunner_ULR/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Samza/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Java_PVR_Spark_Batch/lastCompletedBuild/">
<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PostCommit_Java_PVR_Spark_Batch/lastCompletedBuild/badge/icon?subject=Portable">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Java_ValidatesRunner_SparkStructuredStreaming/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Java_ValidatesRunner_Twister2/lastCompletedBuild/">
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<td>Python</td>
<td>---</td>
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Py_VR_Dataflow/lastCompletedBuild/">
<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PostCommit_Py_VR_Dataflow/lastCompletedBuild/badge/icon?subject=V1">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Py_VR_Dataflow_V2/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Py_ValCont/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PreCommit_Python_PVR_Flink_Cron/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Python_VR_Flink/lastCompletedBuild/">
<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PostCommit_Python_VR_Flink/lastCompletedBuild/badge/icon">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Python_VR_Samza/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Python_VR_Spark/lastCompletedBuild/">
<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PostCommit_Python_VR_Spark/lastCompletedBuild/badge/icon">
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<td>---</td>
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<td>XLang</td>
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_XVR_Direct/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_XVR_PythonUsingJava_Dataflow/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_XVR_PythonUsingJavaSQL_Dataflow/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_XVR_Samza/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_XVR_Spark/lastCompletedBuild/">
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<td>---</td>
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</tbody>
</table>
Examples testing status on various runners
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<table>
<thead>
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<th>Lang</th>
<th>ULR</th>
<th>Dataflow</th>
<th>Flink</th>
<th>Samza</th>
<th>Spark</th>
<th>Twister2</th>
</tr>
</thead>
<tbody>
<tr>
<td>Go</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
</tr>
<tr>
<td>Java</td>
<td>---</td>
<td>
<a href="https://ci-beam.apache.org/job/beam_PreCommit_Java_Examples_Dataflow_Cron/lastCompletedBuild/">
<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PreCommit_Java_Examples_Dataflow_Cron/lastCompletedBuild/badge/icon?subject=V1">
</a><br>
<a href="https://ci-beam.apache.org/job/beam_PreCommit_Java_Examples_Dataflow_Java11_Cron/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Java_Examples_Dataflow_V2/lastCompletedBuild/">
<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PostCommit_Java_Examples_Dataflow_V2/lastCompletedBuild/badge/icon?subject=V2">
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<td>Python</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
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<tr>
<td>XLang</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
</tr>
</tbody>
</table>
Post-Commit SDK/Transform Integration Tests Status (on master branch)
------------------------------------------------------------------------------------------------
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<th>Go</th>
<th>Java</th>
<th>Python</th>
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</thead>
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<td>
<a href="https://ci-beam.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Java/lastCompletedBuild/">
<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PostCommit_Java/lastCompletedBuild/badge/icon">
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<td>
<a href="https://ci-beam.apache.org/job/beam_PostCommit_Python36/lastCompletedBuild/">
<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PostCommit_Python36/lastCompletedBuild/badge/icon?subject=3.6">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Python37/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Python38/lastCompletedBuild/">
<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PostCommit_Python38/lastCompletedBuild/badge/icon?subject=3.8">
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Pre-Commit Tests Status (on master branch)
------------------------------------------------------------------------------------------------
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<thead>
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<th>---</th>
<th>Java</th>
<th>Python</th>
<th>Go</th>
<th>Website</th>
<th>Whitespace</th>
<th>Typescript</th>
</tr>
</thead>
<tbody>
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<td>Non-portable</td>
<td>
<a href="https://ci-beam.apache.org/job/beam_PreCommit_Java_Cron/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PreCommit_Python_Cron/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PreCommit_PythonLint_Cron/lastCompletedBuild/">
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</a><br>
<a href="https://ci-beam.apache.org/job/beam_PreCommit_PythonDocker_Cron/lastCompletedBuild/">
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</a><br>
<a href="https://ci-beam.apache.org/job/beam_PreCommit_PythonDocs_Cron/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PreCommit_Go_Cron/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PreCommit_Website_Cron/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PreCommit_Whitespace_Cron/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PreCommit_Typescript_Cron/lastCompletedBuild/">
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<td>Portable</td>
<td>---</td>
<td>
<a href="https://ci-beam.apache.org/job/beam_PreCommit_Portable_Python_Cron/lastCompletedBuild/">
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</td>
<td>---</td>
<td>---</td>
<td>---</td>
</tr>
</tbody>
</table>
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Issue Time Tracking
-------------------
Worklog Id: (was: 717966)
Remaining Estimate: 0h
Time Spent: 10m
> Multiple jobs running on Flink session cluster reuse the persistent Python environment.
> ---------------------------------------------------------------------------------------
>
> Key: BEAM-12792
> URL: https://issues.apache.org/jira/browse/BEAM-12792
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-harness
> Affects Versions: 2.27.0, 2.28.0, 2.29.0, 2.30.0, 2.31.0
> Environment: Kubernetes 1.20 on Ubuntu 18.04.
> Reporter: Jens Wiren
> Priority: P1
> Labels: FlinkRunner, beam
> Time Spent: 10m
> Remaining Estimate: 0h
>
> I'm running TFX pipelines on a Flink cluster using Beam in k8s. However, extra python packages passed to the Flink runner (or rather beam worker side-car) are only installed once per deployment cycle. Example:
> # Flink is deployed and is up and running
> # A TFX pipeline starts, submits a job to Flink along with a python whl of custom code and beam ops.
> # The beam worker installs the package and the pipeline finishes succesfully.
> # A new TFX pipeline is build where a new beam fn is introduced, the pipline is started and the new whl is submitted as in step 2).
> # This time, the new package is not being installed in the beam worker causing the job to fail due to a reference which does not exist in the beam worker, since it didn't install the new package.
>
> I started using Flink from beam version 2.27 and it has been an issue all the time.
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