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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2020/11/09 01:26:11 UTC
[GitHub] [flink] kezhuw opened a new pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
kezhuw opened a new pull request #13989:
URL: https://github.com/apache/flink/pull/13989
## What is the purpose of the change
Synchronize `fetchers.isEmpty` status to `SourceReaderBase` using `elementsQueue.notifyAvailable()`.
## Brief change log
* Add test case to fail empty queue assumption in `SourceReaderBase.finishedOrAvailableLater`.
* Correct empty queue assumption by returning `InputStatus.MORE_AVAILABLE` if not empty.
* Synchronize `fetchers.isEmpty` status to `SourceReaderBase` using `elementsQueue.notifyAvailable()`.
## Verifying this change
This change is already covered by existing tests, such as:
* `CoordinatedSourceITCase.testEnumeratorReaderCommunication`.
This change added tests and can be verified as follows:
* `SourceReaderBaseTest.testMultipleSplitsWithSeparatedFinishedRecord`
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (no)
- The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (no)
- The serializers: (no)
- The runtime per-record code paths (performance sensitive): (no)
- Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (no)
- The S3 file system connector: (no)
## Documentation
- Does this pull request introduce a new feature? (no)
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[GitHub] [flink] asfgit closed pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
asfgit closed pull request #13989:
URL: https://github.com/apache/flink/pull/13989
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[GitHub] [flink] flinkbot commented on pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
flinkbot commented on pull request #13989:
URL: https://github.com/apache/flink/pull/13989#issuecomment-723704219
Thanks a lot for your contribution to the Apache Flink project. I'm the @flinkbot. I help the community
to review your pull request. We will use this comment to track the progress of the review.
## Automated Checks
Last check on commit 5da43fd50d04596217e89f547f97dbb4711ca7ee (Mon Nov 09 01:28:42 UTC 2020)
**Warnings:**
* No documentation files were touched! Remember to keep the Flink docs up to date!
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## Review Progress
* ❓ 1. The [description] looks good.
* ❓ 2. There is [consensus] that the contribution should go into to Flink.
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* ❓ 4. The change fits into the overall [architecture].
* ❓ 5. Overall code [quality] is good.
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[GitHub] [flink] kezhuw commented on pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
kezhuw commented on pull request #13989:
URL: https://github.com/apache/flink/pull/13989#issuecomment-724740105
@flinkbot run travis
Rerun test ci due to probably unrelated [failure](https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=9368&view=logs&j=c88eea3b-64a0-564d-0031-9fdcd7b8abee&t=ff888d9b-cd34-53cc-d90f-3e446d355529&l=20962).
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[GitHub] [flink] flinkbot edited a comment on pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #13989:
URL: https://github.com/apache/flink/pull/13989#issuecomment-723709607
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## CI report:
* 5da43fd50d04596217e89f547f97dbb4711ca7ee Azure: [FAILURE](https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=9325)
* 7769826c671c1c7e081128ab1a5cf74819808456 Azure: [PENDING](https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=9330)
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[GitHub] [flink] flinkbot commented on pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
flinkbot commented on pull request #13989:
URL: https://github.com/apache/flink/pull/13989#issuecomment-723709607
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## CI report:
* 5da43fd50d04596217e89f547f97dbb4711ca7ee UNKNOWN
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[GitHub] [flink] flinkbot edited a comment on pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #13989:
URL: https://github.com/apache/flink/pull/13989#issuecomment-723709607
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## CI report:
* 1ae89af64c82b8cb9782dd5975f636a795ca978e Azure: [FAILURE](https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=9368)
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[GitHub] [flink] flinkbot edited a comment on pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #13989:
URL: https://github.com/apache/flink/pull/13989#issuecomment-723709607
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## CI report:
* 1ae89af64c82b8cb9782dd5975f636a795ca978e Azure: [FAILURE](https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=9368)
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[GitHub] [flink] kezhuw commented on a change in pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
kezhuw commented on a change in pull request #13989:
URL: https://github.com/apache/flink/pull/13989#discussion_r520212476
##########
File path: flink-connectors/flink-connector-base/src/main/java/org/apache/flink/connector/base/source/reader/SourceReaderBase.java
##########
@@ -270,7 +270,9 @@ private InputStatus finishedOrAvailableLater() {
splitFetcherManager.checkErrors();
return InputStatus.END_OF_INPUT;
} else {
- throw new IllegalStateException("Called 'finishedOrAvailableLater()' with shut-down fetchers but non-empty queue");
+ // We may fall in this method because of purely finished splits record. If all splits
Review comment:
@StephanEwen I have changed the comment to what you recommend in fixup commit. In addition to this, I add another fixup commit with new test case `testMultipleSplitsWithDifferentFinishingMoments` which I think is more common than `testMultipleSplitsWithSeparatedFinishedRecord`. After changes, I think the comment covers general concurrent problem while not tied to a specific case, in my opinion.
Both above fixup commits should be squashed out before merging.
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[GitHub] [flink] kezhuw commented on pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
kezhuw commented on pull request #13989:
URL: https://github.com/apache/flink/pull/13989#issuecomment-724032576
@flinkbot attention @StephanEwen @becketqin
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[GitHub] [flink] StephanEwen commented on a change in pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
StephanEwen commented on a change in pull request #13989:
URL: https://github.com/apache/flink/pull/13989#discussion_r520080247
##########
File path: flink-connectors/flink-connector-base/src/main/java/org/apache/flink/connector/base/source/reader/SourceReaderBase.java
##########
@@ -270,7 +270,9 @@ private InputStatus finishedOrAvailableLater() {
splitFetcherManager.checkErrors();
return InputStatus.END_OF_INPUT;
} else {
- throw new IllegalStateException("Called 'finishedOrAvailableLater()' with shut-down fetchers but non-empty queue");
+ // We may fall in this method because of purely finished splits record. If all splits
Review comment:
Maybe change this to:
> We can reach this case if we just processed all data from the queue and finished a split, and concurrently the fetcher finished another split, whose data is then in the queue.
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[GitHub] [flink] flinkbot edited a comment on pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #13989:
URL: https://github.com/apache/flink/pull/13989#issuecomment-723709607
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## CI report:
* 5da43fd50d04596217e89f547f97dbb4711ca7ee Azure: [FAILURE](https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=9325)
* 7769826c671c1c7e081128ab1a5cf74819808456 UNKNOWN
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[GitHub] [flink] flinkbot edited a comment on pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #13989:
URL: https://github.com/apache/flink/pull/13989#issuecomment-723709607
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* 7769826c671c1c7e081128ab1a5cf74819808456 Azure: [SUCCESS](https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=9330)
* 1ae89af64c82b8cb9782dd5975f636a795ca978e UNKNOWN
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[GitHub] [flink] flinkbot edited a comment on pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #13989:
URL: https://github.com/apache/flink/pull/13989#issuecomment-723709607
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[GitHub] [flink] flinkbot edited a comment on pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #13989:
URL: https://github.com/apache/flink/pull/13989#issuecomment-723709607
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[GitHub] [flink] flinkbot edited a comment on pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
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[GitHub] [flink] flinkbot edited a comment on pull request #13989: [FLINK-19448][connector/common] Synchronize fetchers.isEmpty status to SourceReaderBase using elementsQueue.notifyAvailable()
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #13989:
URL: https://github.com/apache/flink/pull/13989#issuecomment-723709607
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