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From: johnma14 <git@git.apache.org>
To: dev@kafka.apache.org
Reply-To: dev@kafka.apache.org
Message-ID: <git-pr-2913-kafka@git.apache.org>
Subject: [GitHub] kafka pull request #2913: Kafka-4994: Fix findbug warnings about OffsetStora...
Content-Type: text/plain
Date: Tue, 25 Apr 2017 16:54:58 +0000 (UTC)
archived-at: Tue, 25 Apr 2017 16:55:01 -0000

GitHub user johnma14 opened a pull request:

    https://github.com/apache/kafka/pull/2913

    Kafka-4994: Fix findbug warnings about OffsetStorageWriter

    OffsetStorageWriter is not a thread-safe class and should be accessed
    only from a Task's processing thread. The WorkerSourceTask class calls
    the different methods (offset, beginFlush, cancelFlush, handleFinishWrite)
    within a synchronized block. Hence the method definitions in 
    OffsetStorageWriter.java does not need to contain the keyword synchronized
    again.
    
    In the OffsetStorageWriter.java class, the doFlush() method is not explicitely
    synchronized like the other methods in this class. Hence this can lead to
    inconsistent synchronization of variables like currentFlushId and toFlush which
    are set in the synchronized methods within this class.
    
    - https://github.com/apache/kafka/blob/trunk/connect/runtime/src/main/java/org/apache/kafka/connect/storage/OffsetStorageWriter.java
    - https://github.com/apache/kafka/blob/trunk/connect/runtime/src/main/java/org/apache/kafka/connect/runtime/WorkerSourceTask.java#L295
    
    
    Closes bug: Kafka-4994

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

    $ git pull https://github.com/johnma14/kafka bug/kafka-4994

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

    https://github.com/apache/kafka/pull/2913.patch

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

    This closes #2913
    
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