sankalp kohli created CASSANDRA-9143:
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Summary: Improving consistency of repairAt field across replicas
Key: CASSANDRA-9143
URL: https://issues.apache.org/jira/browse/CASSANDRA-9143
Project: Cassandra
Issue Type: Bug
Components: Core
Reporter: sankalp kohli
Priority: Minor
We currently send an anticompaction request to all replicas. During this, a
node will split stables and mark the appropriate ones repaired.
The problem is that this could fail on some replicas due to many reasons
leading to problems in the next repair.
This is what I am suggesting to improve it.
1) Send anticompaction request to all replicas. This can be done at session
level.
2) During anticompaction, stables are split but not marked repaired.
3) When we get positive ack from all replicas, coordinator will send another
message called markRepaired.
4) On getting this message, replicas will mark the appropriate stables as
repaired.
This will reduce the window of failure. We can also think of "hinting"
markRepaired message if required.
Also the stables which are streaming can be marked as repaired like it is done
now.
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