[
https://issues.apache.org/jira/browse/CASSANDRA-10515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14959218#comment-14959218
]
Jeff Griffith commented on CASSANDRA-10515:
-------------------------------------------
btw, we tried commitlog_segment_recycling: false but we realized after this
should already be the default. we briefly thought it made a difference after
restart that node but the problem did return after several hours. there is some
mention in another jira about tuning the number of memtable flush writers.
could this be an issue? it's still difficult to explain though why we only see
this in a few nodes in the ten clusters all with the same config.
will try to get the thread dump asap.
> Commit logs back up 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
> Assignee: Branimir Lambov
> Priority: Critical
> Labels: commitlog, triage
> Attachments: CommitLogProblem.jpg, CommitLogSize.jpg, system.log.clean
>
>
> 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 before it restarts. Once it reaches the state of more than 12G
> commit log files, "nodetool compactionstats" hangs. Eventually C* restarts
> without errors (not sure yet whether it is crashing but I'm checking into it)
> and the cleanup occurs and the commit logs shrink back down again. Here is
> the nodetool compactionstats immediately after restart.
> {code}
> [email protected]:~$ ndc
> pending tasks: 2185
> compaction type keyspace table completed
> total unit progress
> Compaction SyncCore *cf1* 61251208033
> 170643574558 bytes 35.89%
> Compaction SyncCore *cf2* 19262483904
> 19266079916 bytes 99.98%
> Compaction SyncCore *cf3* 6592197093
> 6592316682 bytes 100.00%
> Compaction SyncCore *cf4* 3411039555
> 3411039557 bytes 100.00%
> Compaction SyncCore *cf5* 2879241009
> 2879487621 bytes 99.99%
> Compaction SyncCore *cf6* 21252493623
> 21252635196 bytes 100.00%
> Compaction SyncCore *cf7* 81009853587
> 81009854438 bytes 100.00%
> Compaction SyncCore *cf8* 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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
