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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