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From "Marcus Eriksson (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-8580) AssertionErrors after activating unchecked_tombstone_compaction with leveled compaction
Date Tue, 20 Jan 2015 10:17:35 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-8580?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Marcus Eriksson updated CASSANDRA-8580:
---------------------------------------
    Attachment: 0001-make-sure-we-don-t-add-tmplink-files-to-the-compacti.patch

when refreshing the compaction strategy we blindly added all files in the cfs, and since tmplink
files are in cfs, they were wrongly added to the compaction strategy and then included in
compactions

[~iamaleksey] to review since you reviewed the WrappingCompactionStrategy stuff

> 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
>            Assignee: Marcus Eriksson
>             Fix For: 2.1.3
>
>         Attachments: 0001-make-sure-we-don-t-add-tmplink-files-to-the-compacti.patch,
system.log, system_omit_cold_reads_at_approx_0830.log
>
>
> 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:
> {code}
> 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]
>         {code}
> 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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