Siyao Meng created RATIS-2102:
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Summary: AsyncApi#send() is not handling retry and reply correctly
for replication levels higher than MAJORITY
Key: RATIS-2102
URL: https://issues.apache.org/jira/browse/RATIS-2102
Project: Ratis
Issue Type: Bug
Affects Versions: 3.1.0
Reporter: Siyao Meng
Assignee: Siyao Meng
RATIS-1994 adds a feature allowing AsyncApi#send() to return only when a
specified replication level is reached. This was done by adding
waitForReplication() in RaftServer.
However, two bugs are found with RATIS-1994 when the (write) replication level
is set to higher than MAJORITY (the default):
1. When the request is retried (e.g. when timed out), the future retrieved from
cache is not correctly waited on with waitForReplication() again. This causes
divergence in the desired behavior depending on if the request is retried or
not. This is fixed by invoking waitForReplication() in writeAsync() rather than
appendTransaction().
2. waitForReplication()'s watch request reply was incorrectly ignored, this is
fixed by combining the reply from write and watch together using
combineReplies()
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