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From "Marcus Eriksson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-8580) AssertionErrors after activating unchecked_tombstone_compaction with leveled compaction
Date Thu, 08 Jan 2015 13:07:34 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-8580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14269279#comment-14269279
] 

Marcus Eriksson commented on CASSANDRA-8580:
--------------------------------------------

Could you post more of the log leading up to the exception? Want to see a line like "... Compacting
[SSTableReader(path='/data/cassandra/data/metrigo_prod/new_user_data/metrigo_prod-new_user_data-tmplink-ka-705732-Data.db']"

> AssertionErrors after activating unchecked_tombstone_compaction with leveled compaction
> ---------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-8580
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8580
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Björn Hachmann
>
> During our upgrade of Cassandra from version 2.0.7 to 2.1.2 we experienced a serious
problem regarding the setting unchecked_tombstone_compaction in combination with leveled compaction
strategy.
> In order to prevent tombstone-threshold-warnings we activated the setting for a specific
table after the upgrade. Some time after that we observed new errors in our log files:
> INFO  [CompactionExecutor:184] 2014-12-11 12:36:06,597 CompactionTask.java:136 - Compacting
[SSTableReader(path='/data/cassandra/data/system/compactions_in_progress/system-compactions_in_progress-ka-1848-Data.db'),
SSTableReader(path='/
> data/cassandra/data/system/compactions_in_progress/system-compactions_in_progress-ka-1847-Data.db'),
SSTableReader(path='/data/cassandra/data/system/compactions_in_progress/system-compactions_in_progress-ka-1845-Data.db'),
SSTableReader
> (path='/data/cassandra/data/system/compactions_in_progress/system-compactions_in_progress-ka-1846-Data.db')]
> ERROR [CompactionExecutor:183] 2014-12-11 12:36:06,613 CassandraDaemon.java:153 - Exception
in thread Thread[CompactionExecutor:183,1,main]
> java.lang.AssertionError: /data/cassandra/data/metrigo_prod/new_user_data/metrigo_prod-new_user_data-tmplink-ka-705732-Data.db
>         at org.apache.cassandra.io.sstable.SSTableReader.getApproximateKeyCount(SSTableReader.java:243)
~[apache-cassandra-2.1.2.jar:2.1.2]
>         at org.apache.cassandra.db.compaction.CompactionTask.runWith(CompactionTask.java:146)
~[apache-cassandra-2.1.2.jar:2.1.2]
>         at org.apache.cassandra.io.util.DiskAwareRunnable.runMayThrow(DiskAwareRunnable.java:48)
~[apache-cassandra-2.1.2.jar:2.1.2]
>         at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28) ~[apache-cassandra-2.1.2.jar:2.1.2]
>         at org.apache.cassandra.db.compaction.CompactionTask.executeInternal(CompactionTask.java:75)
~[apache-cassandra-2.1.2.jar:2.1.2]
>         at org.apache.cassandra.db.compaction.AbstractCompactionTask.execute(AbstractCompactionTask.java:59)
~[apache-cassandra-2.1.2.jar:2.1.2]
>         at org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionTask.run(CompactionManager.java:232)
~[apache-cassandra-2.1.2.jar:2.1.2]
>         at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) ~[na:1.7.0_45]
>         at java.util.concurrent.FutureTask.run(FutureTask.java:262) ~[na:1.7.0_45]
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
~[na:1.7.0_45]
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
[na:1.7.0_45]
>         at java.lang.Thread.run(Thread.java:744) [na:1.7.0_45]
>         
> Obviously that error aborted the compaction and after some time the number of pending
compactions became very high on every node. Of course, this in turn had a negative impact
on several other metrics.
> After reverting the setting we had to restart all nodes. After that compactions could
finish again and the pending compactions could be worked off.



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