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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2021/03/02 11:49:14 UTC

[GitHub] [flink] SteNicholas opened a new pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

SteNicholas opened a new pull request #15058:
URL: https://github.com/apache/flink/pull/15058


   ## What is the purpose of the change
   
   *Remove GC cleaner mechanism for unsafe memory segments. Currently the cleaner passed to the `HybridMemorySegment` is encapsulated by `JavaGcCleanerWrapper`. The encapsulated cleaner is guaranteed to run only once, or it is called actively, if it is not called actively, the JVM will call it when gc is called. The mechanism should be to keep the active clean, not rely on gc for clean, therefore the wrapper of `JavaGcCleanerWrapper` could be removed. At the same time, the related mechanism of applying for memory trigger and waiting for gc in the memory manager could also be removed.*
   
   ## Brief change log
   
     - *`MemoryUtils#createMemoryGcCleaner` removes the wrapper of `JavaGcCleanerWrapper`, directly returns the `Runnable` of cleaner.*
     - *`UnsafeMemoryBudget#reserveMemory` removes the memory allocation and the reservation for a long time waiting for GC.*
   
   ## Verifying this change
   
     - *Remove `testReservationFailsIfOwnerNotGced`, `testReservationSuccessIfOwnerGced` test case of `UnsafeMemoryBudgetTest`.*
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (yes / **no**)
     - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (yes / **no**)
     - The serializers: (yes / **no** / don't know)
     - The runtime per-record code paths (performance sensitive): (yes / **no** / don't know)
     - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (yes / **no** / don't know)
     - The S3 file system connector: (yes / **no** / don't know)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (yes / **no**)
     - If yes, how is the feature documented? (**not applicable** / docs / JavaDocs / not documented)


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[GitHub] [flink] xintongsong closed pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
xintongsong closed pull request #15058:
URL: https://github.com/apache/flink/pull/15058


   


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[GitHub] [flink] SteNicholas commented on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
SteNicholas commented on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-791892124


   @xintongsong, the result of CI tests is `SUCCESS`, please help to merge if you are available.


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[GitHub] [flink] xintongsong commented on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
xintongsong commented on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-791940898


   Thanks @SteNicholas. Merging this.


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[GitHub] [flink] SteNicholas commented on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
SteNicholas commented on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-790586993


   @xintongsong , could you please help to review this pull request?


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[GitHub] [flink] flinkbot commented on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
flinkbot commented on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-788779266






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[GitHub] [flink] flinkbot edited a comment on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-788795717


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[GitHub] [flink] flinkbot edited a comment on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-788795717


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   * b2f53518552258f786ef4bf4031d78f24ba51440 Azure: [FAILURE](https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=14100) 
   * 7fc7e7ce7d863359f17554f991fa0eb956a7d19c UNKNOWN
   
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[GitHub] [flink] SteNicholas commented on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
SteNicholas commented on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-789363237


   @flinkbot run azure


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[GitHub] [flink] flinkbot edited a comment on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-788795717


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[GitHub] [flink] flinkbot edited a comment on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-788795717


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   * b2f53518552258f786ef4bf4031d78f24ba51440 Azure: [FAILURE](https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=14100) 
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[GitHub] [flink] flinkbot edited a comment on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-788795717


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[GitHub] [flink] SteNicholas commented on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
SteNicholas commented on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-791401680


   @flinkbot run azure


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[GitHub] [flink] flinkbot edited a comment on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-788795717


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[GitHub] [flink] flinkbot edited a comment on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-788795717


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[GitHub] [flink] flinkbot edited a comment on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-788795717


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[GitHub] [flink] flinkbot edited a comment on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-788795717


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[GitHub] [flink] flinkbot edited a comment on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-788795717


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[GitHub] [flink] flinkbot edited a comment on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-788795717


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[GitHub] [flink] SteNicholas removed a comment on pull request #15058: [FLINK-21419][coordination] Remove GC cleaner mechanism for unsafe memory segments

Posted by GitBox <gi...@apache.org>.
SteNicholas removed a comment on pull request #15058:
URL: https://github.com/apache/flink/pull/15058#issuecomment-789363237


   @flinkbot run azure


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