[jira] [Created] (HIVE-23606) LLAP: Delay In DirectByteBuffer Clean Up For EncodedReaderImpl

["Syed Shameerur Rahman (Jira)" <ji...@apache.org>]

Syed Shameerur Rahman created HIVE-23606:
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             Summary: LLAP: Delay In DirectByteBuffer Clean Up For EncodedReaderImpl
                 Key: HIVE-23606
                 URL: https://issues.apache.org/jira/browse/HIVE-23606
             Project: Hive
          Issue Type: Bug
    Affects Versions: 3.0.0
            Reporter: Syed Shameerur Rahman
            Assignee: Syed Shameerur Rahman
             Fix For: 4.0.0


DirectByteBuffler are only cleaned up when there is Full GC or manually invoked cleaner method of DirectByteBuffer, Since full GC may take some time to kick in, In the meanwhile the native memory usage of LLAP daemon process might shoot up and this will force the YARN pmem monitor to kill the container running the daemon.

HIVE-16180 tried to solve this problem, but the code structure got messed up after HIVE-15665

The IdentityHashMap (toRelease) is initialized in https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/io/orc/encoded/EncodedReaderImpl.java#L409 , but it is getting re-initialized inside the method getDataFromCacheAndDisk() https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/io/orc/encoded/EncodedReaderImpl.java#L633  which makes it local to that method hence the original toRelease IdentityHashMap remains empty.



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