Zhong Yanghong created KYLIN-2881:
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Summary: Improve hbase coprocessor exception handling at kylin
server side
Key: KYLIN-2881
URL: https://issues.apache.org/jira/browse/KYLIN-2881
Project: Kylin
Issue Type: Improvement
Components: Query Engine
Affects Versions: v2.1.0
Reporter: Zhong Yanghong
Assignee: Zhong Yanghong
Fix For: v2.2.0
A query may need a bunch of hconnections to visit hbase. Anyone of them fails,
the whole query should be interrupted, and all of the related hconnections
should be released for future other queries despite that currently we cannot
interrupt the threads at hbase coprocessor side.
To achieve this goal, there're still some improvements:
# If any exception found in {{ExpectedSizeIterator}}, all of other hconnection
threads should be interrupted if possible.
# If any exception found in {{ExpectedSizeIterator}}, the callback of
coprocessor call should be return early.
# When query timeout, stop putting data to the queue of {{ExpectedSizeIterator}}
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