You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@beam.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2022/03/29 02:47:00 UTC
[jira] [Work logged] (BEAM-14187) NullPointerException or IllegalStateException at IsmReaderImpl in Dataflow
[ https://issues.apache.org/jira/browse/BEAM-14187?focusedWorklogId=749087&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-749087 ]
ASF GitHub Bot logged work on BEAM-14187:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 29/Mar/22 02:46
Start Date: 29/Mar/22 02:46
Worklog Time Spent: 10m
Work Description: baeminbo opened a new pull request #17201:
URL: https://github.com/apache/beam/pull/17201
This PR has two changes:
1. Fix NullPointerException and IllegalStateException in BEAM-14187.
2. Add more condition check for ISM data integrity.
------------------------
Thank you for your contribution! Follow this checklist to help us incorporate your contribution quickly and easily:
- [ ] [**Choose reviewer(s)**](https://beam.apache.org/contribute/#make-your-change) and mention them in a comment (`R: @username`).
- [ ] Format the pull request title like `[BEAM-XXX] Fixes bug in ApproximateQuantiles`, where you replace `BEAM-XXX` with the appropriate JIRA issue, if applicable. This will automatically link the pull request to the issue.
- [ ] Update `CHANGES.md` with noteworthy changes.
- [ ] If this contribution is large, please file an Apache [Individual Contributor License Agreement](https://www.apache.org/licenses/icla.pdf).
See the [Contributor Guide](https://beam.apache.org/contribute) for more tips on [how to make review process smoother](https://beam.apache.org/contribute/#make-reviewers-job-easier).
To check the build health, please visit [https://github.com/apache/beam/blob/master/.test-infra/BUILD_STATUS.md](https://github.com/apache/beam/blob/master/.test-infra/BUILD_STATUS.md)
GitHub Actions Tests Status (on master branch)
------------------------------------------------------------------------------------------------
[](https://github.com/apache/beam/actions?query=workflow%3A%22Build+python+source+distribution+and+wheels%22+branch%3Amaster+event%3Aschedule)
[](https://github.com/apache/beam/actions?query=workflow%3A%22Python+Tests%22+branch%3Amaster+event%3Aschedule)
[](https://github.com/apache/beam/actions?query=workflow%3A%22Java+Tests%22+branch%3Amaster+event%3Aschedule)
See [CI.md](https://github.com/apache/beam/blob/master/CI.md) for more information about GitHub Actions CI.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: github-unsubscribe@beam.apache.org
For queries about this service, please contact Infrastructure at:
users@infra.apache.org
Issue Time Tracking
-------------------
Worklog Id: (was: 749087)
Remaining Estimate: 0h
Time Spent: 10m
> NullPointerException or IllegalStateException at IsmReaderImpl in Dataflow
> --------------------------------------------------------------------------
>
> Key: BEAM-14187
> URL: https://issues.apache.org/jira/browse/BEAM-14187
> Project: Beam
> Issue Type: Bug
> Components: runner-dataflow
> Reporter: Minbo Bae
> Priority: P2
> Time Spent: 10m
> Remaining Estimate: 0h
>
> h6. Problem
> Dataflow Java batch jobs with large side input intermittently throws {{NullPointerException}} or {{{}IllegalStateException{}}}.
> * [NullPointerException|https://gist.githubusercontent.com/baeminbo/459e283eadbc7752c9f23616b52d958a/raw/f0480b8eaff590fb3f3ae2ab98ddce7dd3b4a237/npe.png] happens at [IsmReaderImpl.overKeyComponents|https://github.com/apache/beam/blob/v2.37.0/runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/IsmReaderImpl.java#L217]:
> * [IllegalStateException|https://gist.githubusercontent.com/baeminbo/459e283eadbc7752c9f23616b52d958a/raw/f0480b8eaff590fb3f3ae2ab98ddce7dd3b4a237/IllegalStateException.png] happens at [IsmReaderImpl. initializeForKeyedRead |https://github.com/apache/beam/blob/v2.37.0/runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/IsmReaderImpl.java#L500].
> (all error logs in the Dataflow job is [here|https://gist.githubusercontent.com/baeminbo/459e283eadbc7752c9f23616b52d958a/raw/f0480b8eaff590fb3f3ae2ab98ddce7dd3b4a237/downloaded-logs-20220327-171955.json].)
> h6. Hypothesis
> The {{initializeForKeyedRead}} is not synchronized. Multiple threads can enter the method so that initialize the index for the same shard and update {{indexPerShard}} without synchronization. And, the {{overKeyComponents}} also accesses {{indexPerShard}} without synchronization. As {{indexPerShard}} is just a {{HashMap}} which is not thread-safe, it can cause {{NullPointerException}} and {{IllegalStateException}} above.
> h6. Suggestion
> I think it can fix this issue if we change the type of {{indexPerShard}} to a thread-safe map (e.g. {{ConcurrentHashMap}}).
--
This message was sent by Atlassian Jira
(v8.20.1#820001)