Geoffrey Jacoby created PHOENIX-6548:
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Summary: Race condition when triggering index rebuilds as
regionserver closes
Key: PHOENIX-6548
URL: https://issues.apache.org/jira/browse/PHOENIX-6548
Project: Phoenix
Issue Type: Bug
Affects Versions: 4.16.1, 4.14.3
Reporter: Geoffrey Jacoby
On each regionserver our coprocs keep a cache of HConnections with custom
settings (such as short timeouts) for talking to other regionservers. They're
used when coprocs need to make RPCs, such as during index rebuilds.
When a regionserver is closed, these HConnections are closed as well. However,
we've seen in our test pipelines a race condition where we may have just given
out one of the HConnections to a coprocessor, only to have the connection
closed just before it's used.
This will produce an IllegalArgumentException from the HBase Table object,
which (if the index rebuild was caused by a client Scan) will be thrown back to
the client as a DoNotRetryIOException.
In this case we want the client exception to be a normal retriable IOException,
because if they try again after the region comes up again somewhere else, the
Scan will likely succeed.
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