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From GJL <...@git.apache.org>
Subject [GitHub] flink pull request #5675: [FLINK-7804][flip6] YarnResourceManager does not e...
Date Fri, 09 Mar 2018 13:37:09 GMT
GitHub user GJL opened a pull request:


    [FLINK-7804][flip6] YarnResourceManager does not execute AMRMClientAsync callbacks in
main thread

    ## What is the purpose of the change
    *The `YarnResourceManager` registers callbacks at a `AMRMClientAsync` which it uses to
react to Yarn container allocations. These callbacks, e.g., `onContainersAllocated`, modify
the internal state of the YarnResourceManager. This can lead to race conditions with the `requestYarnContainer`
method. To solve this problem we have to execute the state changing operations in the main
thread of the `YarnResourceManager`.*
    ## Brief change log
      - *Run AMRMClientAsync callbacks in main thread*
      - *Fix `YarnResourceManagerTest`*
    ## Verifying this change
    This change is already covered by existing tests, such as `YarnResourceManagerTest`.
    ## 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,
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

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/GJL/flink FLINK-7804

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #5675
commit f6c61e0c7989d6d67f784818aa94cd112f600bff
Author: gyao <gary@...>
Date:   2018-03-09T13:36:33Z

    [FLINK-7804][flip6] Run AMRMClientAsync callbacks in main thread



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