Review Request 52179: There's race condition that the AckReader thread got the read lock and waitng for ack, but the stopSender() kicks in

[xiaojian zhou]

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Review request for geode and Dan Smith.


Bugs: geode-1894
    https://issues.apache.org/jira/browse/geode-1894


Repository: geode


Description
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To resolve the race condition, we should double check if if Sender's processor 
is stopped. If yes, then don't wait for ack


Diffs
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geode-wan/src/main/java/org/apache/geode/internal/cache/wan/GatewaySenderEventRemoteDispatcher.java
 6beb0ee046d7e0cae5985b6430a390dd68f1351a 

Diff: https://reviews.apache.org/r/52179/diff/


Testing
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Thanks,

xiaojian zhou