Duo Zhang created HBASE-20568:
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Summary: Concurrency issue for CombinedAsyncWriter
Key: HBASE-20568
URL: https://issues.apache.org/jira/browse/HBASE-20568
Project: HBase
Issue Type: Sub-task
Reporter: Duo Zhang
In sequential mode, we need to wait for the previous writer's sync completes
before issue the sync for the next writer. But the sync request is
asynchronous, so we will return immediately and then we can call append, so it
is possible that we call append and sync at the same time and cause concurrency
issues.
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