Prasanth Jayachandran created HIVE-18269:
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Summary: LLAP: Fast llap io with slow processing pipeline can lead
to OOM
Key: HIVE-18269
URL: https://issues.apache.org/jira/browse/HIVE-18269
Project: Hive
Issue Type: Bug
Affects Versions: 3.0.0
Reporter: Prasanth Jayachandran
Assignee: Prasanth Jayachandran
pendingData linked list in Llap IO elevator (LlapRecordReader.java) may have
grow indefinitely when Llap IO is faster than processing pipeline. Since we
don't have backpressure to slow down the IO, this can lead to indefinite growth
of pending data leading to severe GC pressure and eventually lead to OOM.
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