[jira] [Created] (RATIS-2727) LogAppender purge tests may fail due to concurrent nextIndex updates

["Shilun Fan (Jira)" <ji...@apache.org>]

Shilun Fan created RATIS-2727:
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             Summary: LogAppender purge tests may fail due to concurrent nextIndex updates
                 Key: RATIS-2727
                 URL: https://issues.apache.org/jira/browse/RATIS-2727
             Project: Ratis
          Issue Type: Bug
            Reporter: Shilun Fan
            Assignee: Shilun Fan


{{The LogAppender purge tests modify the FollowerInfo of a running appender.}}

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{{Background replication can update nextIndex before the test checks that it remains unchanged, causing a spurious assertion failure:}}

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{code:java}
Follower nextIndex should remain unchanged
==> expected: <58> but was: <61> {code}
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{{This can happen even when the leader does not change.}}

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{{Affected tests: }}
 * {{testNewAppendEntriesRequestAfterPurgeFollowerAtStartIndex}}
 * {{ testNewAppendEntriesRequestAfterPurgeFollowerBehindStartIndex}}{{{}{}}}{{{}{}}}

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