Sirius created ZOOKEEPER-4646:
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Summary: Committed txns may be lost if followers reply ACK-LD
before writing txns to disk
Key: ZOOKEEPER-4646
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4646
Project: ZooKeeper
Issue Type: Bug
Components: quorum, server
Affects Versions: 3.8.0
Reporter: Sirius
When a follower is processing the NEWLEADER message in SYNC phase, it will call
logRequest(..) to submit the txn persistence task to the SyncRequestProcessor
thread. The latter does not promise to finish the task before the follower
replies ACK-LD to the leader. which may trigger committed data loss.
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