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https://issues.apache.org/jira/browse/HDDS-16081?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Attila Doroszlai updated HDDS-16081:
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Parent Issue: HDDS-5626 (was: HDDS-9000)
> Flaky TestOMRatisSnapshots#testInstallSnapshotWithClientWrite: follower may
> not have all keys when the leader's last applied index is reached
> ---------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HDDS-16081
> URL: https://issues.apache.org/jira/browse/HDDS-16081
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: Snapshot, test
> Affects Versions: 2.3.0
> Reporter: Sergey Soldatov
> Assignee: Sergey Soldatov
> Priority: Minor
> Labels: pull-request-available
>
> testInstallSnapshotWithClientWrite fails intermittently with "expected: not
> <null>" when it verifies that the follower OM's DB contains the keys written
> after the follower was started. The test waits for the follower's last
> applied index to reach the leader's and reads the keys directly from the
> follower's DB. An OM acks a write as soon as the response is added to the
> double buffer, but the last applied index only advances *after* the double
> buffer commits the batch to RocksDB. When the client writes return, the
> leader's applied index can still be behind the last key written, and the
> follower.
> This appears after HDDS-10310, which replaced the Thread.sleep(5000) with
> the index-based wait, and removed the per-key sleep from the write loop,
> making the writes fast enough to widen the window.
> [~chihsuan] Please let me know if my RCA was wrong.
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