Slim Bouguerra created HIVE-23041:
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Summary: LLAP purge command can lead to resource leak
Key: HIVE-23041
URL: https://issues.apache.org/jira/browse/HIVE-23041
Project: Hive
Issue Type: Bug
Reporter: Slim Bouguerra
As per the Java Spec
https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html
An unused ExecutorService should be shut down to allow reclamation of its
resources.
Code like this is a serious resource leak in case user fires multiple commands.
https://github.com/apache/hive/blob/7ae6756d40468d18b65423a0b5174b827dc42b60/ql/src/java/org/apache/hadoop/hive/ql/processors/LlapCacheResourceProcessor.java#L132
The other question that this raise is how those tasks responds to interrupt or
cancel on the thread level [~prasanth_j] any idea if one task hangs on IO what
happens ?
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