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https://issues.apache.org/jira/browse/CASSANDRA-18816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17765705#comment-17765705
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Marcus Eriksson commented on CASSANDRA-18816:
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added first round of comments on the PR, will check the rest (basically the
tests) next week
> Add support for repair coordinator to retry messages that timeout
> -----------------------------------------------------------------
>
> Key: CASSANDRA-18816
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18816
> Project: Cassandra
> Issue Type: Improvement
> Components: Consistency/Repair
> Reporter: David Capwell
> Assignee: David Capwell
> Priority: Normal
> Fix For: 5.x
>
> Time Spent: 6h 10m
> Remaining Estimate: 0h
>
> Now that CASSANDRA-15399 is in, most of the repair messages have a state that
> they can check against to make message delivery idempotent, allowing the
> coordinator to retry such messages; a few of the most critical messages to
> retry are: PREPARE_MSG, VALIDATION_REQ, VALIDATION_RSP, SYNC_REQ, and
> SYNC_RSP.
> With this I propose making the coordinator able to retry these key messages
> to try and make repair more resilient to ephemeral issues.
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