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Posted to commits@cassandra.apache.org by "Brandon Williams (Jira)" <ji...@apache.org> on 2021/04/28 16:10:00 UTC
[jira] [Commented] (CASSANDRA-16638) compactions/repairs hangs
[ https://issues.apache.org/jira/browse/CASSANDRA-16638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17334843#comment-17334843 ]
Brandon Williams commented on CASSANDRA-16638:
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Are there any symptoms outside of reaper?
> compactions/repairs hangs
> -------------------------
>
> Key: CASSANDRA-16638
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16638
> Project: Cassandra
> Issue Type: Bug
> Components: Consistency/Repair, Local/Compaction
> Reporter: regis le bretonnic
> Priority: Normal
>
> Hi
> We meet an issue during repairs (but more probably compaction issue in fact) since we upgraded from 3.11.1 to 3.11.10.
> We are using reaper, but the issue doesn't seem to come from it (according to [~adejanovski@hotmail.com] ). When the problem happens, repairs driven by reaper are blocked.
> Basically reaper hangs with the message "All nodes are busy or have too many pending compactions for the remaining candidate segments." and indeed one node has a lot of compaction pending tasks :
>
> {code:java}
> $ nodetool compactionstats
> pending tasks: 95
> - mt_metrics.metric_32: 95
> {code}
> Errors in log are :
>
> {code:java}
> WARN [CompactionExecutor:12909] 2021-04-28 08:59:51,241 LeveledCompactionStrategy.java:144 - Could not acquire references for compacting SSTables [BigTableReader(path='/var/lib/cassandra/d
> ....
> WARN [CompactionExecutor:12909] 2021-04-28 09:00:19,484 LeveledCompactionStrategy.java:144 - Could not acquire references for compacting SSTables [BigTableReader(path='/var/lib/cassandra/d
> ....
> WARN [CompactionExecutor:12908] 2021-04-28 09:00:51,241 LeveledCompactionStrategy.java:144 - Could not acquire references for compacting SSTables [BigTableReader(path='/var/lib/cassandra/d
> ....
> WARN [CompactionExecutor:12907] 2021-04-28 08:58:51,097 LeveledCompactionStrategy.java:144 - Could not acquire references for compacting SSTables [BigTableReader(path='/var/lib/cassandra/data/mt_metrics/metric_32-23300de089c311e882a61bd0fd209f48/md-350757-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/mt_metrics/metric_32-23300de089c311e882a61bd0fd209f48/md-350755-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/mt_metrics/metric_32-23300de089c311e882a61bd0fd209f48/md-350738-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/mt_metrics/metric_32-23300de089c311e882a61bd0fd209f48/md-350759-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/mt_metrics/metric_32-23300de089c311e882a61bd0fd209f48/md-350761-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/mt_metrics/metric_32-23300de089c311e882a61bd0fd209f48/md-350740-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/mt_metrics/metric_32-23300de089c311e882a61bd0fd209f48/md-350751-big-Data.db'), BigTableReader(path='/var/lib/cassandra/data/mt_metrics/
> ....
> {code}
> The error happened several times in few weeks and up to now always concerns LCS tables.
> a.dejanoski mentioned me https://issues.apache.org/jira/browse/CASSANDRA-15242 but I have no trace of messages like "disk boundaries are out of date for keyspacename.tablename" or "Refreshing disk boundary cache for keyspacename.tablename".
> The workaround is simple : just restart the node once it is identified. Pending compactions tasks rerun well.
> We have the issue on 2 of our clusters on 3.11.10.
> Does someone else met the issue ?
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