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From "Nikolai Grigoriev (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-8210) "java.lang.AssertionError: Memory was freed" exception in CompactionExecutor
Date Wed, 29 Oct 2014 15:31:33 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-8210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14188456#comment-14188456
] 

Nikolai Grigoriev commented on CASSANDRA-8210:
----------------------------------------------

Opened new ticket as per [~jbellis]'s recommendation in response to my comment to CASSANDRA-5256

> "java.lang.AssertionError: Memory was freed" exception in CompactionExecutor
> ----------------------------------------------------------------------------
>
>                 Key: CASSANDRA-8210
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8210
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: DSE 4.5.2, Cassandra 2.0.10, OEL 6.5, kernel 3.8.13-44.el6uek.x86_64,
128Gb of RAM, swap disabled, JRE 1.7.0_67-b01
>            Reporter: Nikolai Grigoriev
>            Priority: Minor
>         Attachments: cassandra-env.sh, cassandra.yaml, occurence frequency.png, system.log.gz
>
>
> I have just got this problem on multiple nodes. Cassandra 2.0.10 (DSE 4.5.2). After looking
through the history I have found that it was actually happening on all nodes since the start
of large compaction process (I've loaded tons of data in the system and then turned off all
load to let it compact the data).
> {code}
> ERROR [CompactionExecutor:1196] 2014-10-28 17:14:50,124 CassandraDaemon.java (line 199)
Exception in thread Thread[CompactionExecutor:1196,1,main]
> java.lang.AssertionError: Memory was freed
>         at org.apache.cassandra.io.util.Memory.checkPosition(Memory.java:259)
>         at org.apache.cassandra.io.util.Memory.getInt(Memory.java:211)
>         at org.apache.cassandra.io.sstable.IndexSummary.getIndex(IndexSummary.java:79)
>         at org.apache.cassandra.io.sstable.IndexSummary.getKey(IndexSummary.java:84)
>         at org.apache.cassandra.io.sstable.IndexSummary.binarySearch(IndexSummary.java:58)
>         at org.apache.cassandra.io.sstable.SSTableReader.getSampleIndexesForRanges(SSTableReader.java:692)
>         at org.apache.cassandra.io.sstable.SSTableReader.estimatedKeysForRanges(SSTableReader.java:663)
>         at org.apache.cassandra.db.compaction.AbstractCompactionStrategy.worthDroppingTombstones(AbstractCompactionStrategy.java:328)
>         at org.apache.cassandra.db.compaction.LeveledCompactionStrategy.findDroppableSSTable(LeveledCompactionStrategy.java:354)
>         at org.apache.cassandra.db.compaction.LeveledCompactionStrategy.getMaximalTask(LeveledCompactionStrategy.java:125)
>         at org.apache.cassandra.db.compaction.LeveledCompactionStrategy.getNextBackgroundTask(LeveledCompactionStrategy.java:113)
>         at org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionTask.run(CompactionManager.java:192)
>         at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
>         at java.util.concurrent.FutureTask.run(FutureTask.java:262)
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> {code}



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