Jackson Yao created RATIS-1400:
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Summary: add a separate RWlock for GrpcLogAppender
Key: RATIS-1400
URL: https://issues.apache.org/jira/browse/RATIS-1400
Project: Ratis
Issue Type: Improvement
Reporter: Jackson Yao
in GrpcLogAppender.java, `synchronized` is used for two purposes:
1 protect `wait()`
2 protect variables like `pendingRequests`, `pending` , etc.
i think it is better off add a separate RWLock for the second case ， and keep
`synchronized` only for wait and notify, thus any slow IO option will not block
notify
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