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https://issues.apache.org/jira/browse/CASSANDRA-12901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15667927#comment-15667927
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Paulo Motta commented on CASSANDRA-12901:
-----------------------------------------
The dtest is testing two scenarios:
1 - failed replica syncing to other participant
2 - failed replica syncing from coordinator
But there was an error in the original dtest which was making it test only case
1. When I fixed case 2, the repair session is failing due to streaming
breaking, but streaming fails befores the FD detects the node is down, so an
anti-compaction request is being sent to the failed replica, which never
replies, making repair hang again. So, this just uncovered another bug which is
that if a node fails in the middle of anti-compaction repair will also hang. I
will also address this in this same ticket, but will keep it as PA to get
initial feedback.
> Repair may hang if node dies during sync
> ----------------------------------------
>
> Key: CASSANDRA-12901
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12901
> Project: Cassandra
> Issue Type: Bug
> Components: Streaming and Messaging
> Reporter: Paulo Motta
> Assignee: Paulo Motta
>
> Since the repair coordinator unregisters from the FD after validation
> (CASSANDRA-3569), if the initiator of a RemoteSyncTask fails, the coordinator
> will never know the sync task failed and hang.
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