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https://issues.apache.org/jira/browse/CASSANDRA-10515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14955520#comment-14955520
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Jeff Griffith commented on CASSANDRA-10515:
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See attachment for pattern of compactions.
> Compaction hangs with move to 2.1.10
> ------------------------------------
>
> Key: CASSANDRA-10515
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10515
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: redhat 6.5, cassandra 2.1.10
> Reporter: Jeff Griffith
> Priority: Critical
> Attachments: CommitLogProblem.jpg
>
>
> After upgrading from cassandra 2.0.x to 2.1.10, we began seeing problems
> where some nodes break the 12G commit log max we configured and go as high as
> 65G or more. Once it reaches this state, "nodetool compactionstats" hangs. I
> watched the recovery live when compactions begin happening again. the
> "nodetool compactionstats" suddenly completed to show the outstanding jobs
> most in 100% completion state:
> {code}
> [email protected]:~$ ndc
> pending tasks: 2185
> compaction type keyspace table completed
> total unit progress
> Compaction SyncCore ContactInformationUpdates 61251208033
> 170643574558 bytes 35.89%
> Compaction SyncCore CommEvents 19262483904
> 19266079916 bytes 99.98%
> Compaction SyncCore EndpointPrefixIndexMinimized 6592197093
> 6592316682 bytes 100.00%
> Compaction SyncCore EmailHistogramDeltas 3411039555
> 3411039557 bytes 100.00%
> Compaction SyncCore ContactPrefixBytesIndex 2879241009
> 2879487621 bytes 99.99%
> Compaction SyncCore EndpointProfiles 21252493623
> 21252635196 bytes 100.00%
> Compaction SyncCore CommEvents 81009853587
> 81009854438 bytes 100.00%
> Compaction SyncCore EndpointIndexIntId 3005734580
> 3005768582 bytes 100.00%
> Active compaction remaining time : n/a
> {code}
> I was also doing periodic "nodetool tpstats" which were working but not being
> logged in system.log on the StatusLogger thread until after the compaction
> started working again.
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