Li Wang created ZOOKEEPER-4785:
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Summary: Txn loss due to race condition when follower DIFF sync
with leader
Key: ZOOKEEPER-4785
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4785
Project: ZooKeeper
Issue Type: Bug
Components: server
Affects Versions: 3.9.1, 3.8.2, 3.7.2, 3.8.1, 3.7.1, 3.8.0
Reporter: Li Wang
We had txn loss incident in production recently. The root cause is follower
writes the current epoch and sends the ACK_LD before successfully persisting
all the txns from DIFF sync, as persisting txns is handled asynchronously via
SyncRequestProcessor.
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