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https://issues.apache.org/jira/browse/CASSANDRA-4554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13542234#comment-13542234
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Jonathan Ellis commented on CASSANDRA-4554:
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All I intended here was to store a flag (in the peers table?) or a count (would
need to be a separate CF) for when we've skipped a hint because a replica was
down longer than max_hint_window. If we really want to get fancy we can make
this a replicated CF, i.e., not in the local-only system KS. (A
system_replicated KS keeps looking useful; tracing data could go there too.)
Extending this to "does X need a repair" is substantially more complex
(CASSANDRA-2405) so I don't consider that in scope here.
Exposing other hint metrics is also a separate problem -- I note that the JMX
call for counting hints is O(n) and may even OOM. Let's take that to a
separate ticket as well.
P.S. I'm not a fan of switching hints-in-progress to a Cache, since that
implies it's okay to throw away entries because they can be rebuilt. This is
not the case.
> Log when a node is down longer than the hint window and we stop saving hints
> ----------------------------------------------------------------------------
>
> Key: CASSANDRA-4554
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4554
> Project: Cassandra
> Issue Type: New Feature
> Reporter: Jonathan Ellis
> Assignee: Vijay
> Priority: Minor
> Fix For: 1.2.1
>
> Attachments: 0001-CASSANDRA-4554-add-hint-metrics.patch,
> 0001-CASSANDRA-4554-logging-to-system-table-v2.patch,
> 0002-CASSANDRA-4554-logging-to-system-table.patch
>
>
> We know that we need to repair whenever we lose a node or disk permanently
> (since it may have had undelivered hints on it), but without exposing this we
> don't know when nodes stop saving hints for a temporarily dead node, unless
> we're paying very close attention to external monitoring.
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