Ondrej Kvasnicka created HBASE-23265:
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Summary: Coprocessor restart after region split rollback
Key: HBASE-23265
URL: https://issues.apache.org/jira/browse/HBASE-23265
Project: HBase
Issue Type: Improvement
Components: Coprocessors
Affects Versions: 1.1.2
Reporter: Ondrej Kvasnicka
According to our observation, a running coprocessor that is automatically
stopped prior to region split will not be automatically restarted for the
region that was about to be split in case the split attempt is rolled back.
The expected behavior would be for the coprocessor to be automatically
restarted in such situation.
According to [this
conversation|[https://lists.apache.org/thread.html/9b29afc5aa4994b67bc29a712cef276c7ff10d453f820050fdb760c8@%3Cuser.hbase.apache.org%3E]]
the lack of the automatic restart looks more like an omission rather than an
intended behavior.
A possible work-around seems to be handling the restart explicitly in
RegionObserver#postRollBackSplit() implementation, such as in [this
example|https://github.com/splicemachine/spliceengine/blob/aa9d66e3d33ea04d67203eb86b3e6e3ba768e267/hbase_pipeline/src/main/java/com/splicemachine/derby/hbase/SpliceIndexObserver.java#L206].
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