Duo Zhang created HBASE-26675:
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Summary: Data race on Compactor.writer
Key: HBASE-26675
URL: https://issues.apache.org/jira/browse/HBASE-26675
Project: HBase
Issue Type: Bug
Components: Compaction
Reporter: Duo Zhang
Assignee: Duo Zhang
In Compactor.getCompactionTargets, we use synchronized on the writer instance
but it does not help resolve the data race problem, because in other places we
do not use synchronized...
And since it is not a big deal to the upper layer an old snapshot, we could
just make the writer instance volatile and use it directly in the method, just
make sure we always use the same instance in the method, i.e, assign it to a
local var first.
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