Valentin Martinjuk created CASSANDRA-11904:
----------------------------------------------

             Summary: Exception in thread 
Thread[CompactionExecutor:13358,1,main] java.lang.AssertionError: Memory was 
freed
                 Key: CASSANDRA-11904
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11904
             Project: Cassandra
          Issue Type: Bug
          Components: Compaction
            Reporter: Valentin Martinjuk


We have Cassandra cluster 2.2.5 with two datacenters(3 nodes each).
We observe ERRORs below on all nodes. The ERROR is repeated every minute. 

No any complains from customers. Do we have any chance to fix it?

{code}
ERROR [CompactionExecutor:13996] 2016-05-26 21:20:46,700 
CassandraDaemon.java:185 - Exception in thread 
Thread[CompactionExecutor:13996,1,main]
java.lang.AssertionError: Memory was freed
        at 
org.apache.cassandra.io.util.SafeMemory.checkBounds(SafeMemory.java:103) 
~[apache-cassandra-2.2.5.jar:2.2.5]
        at org.apache.cassandra.io.util.Memory.getInt(Memory.java:292) 
~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.io.sstable.IndexSummary.getPositionInSummary(IndexSummary.java:148)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.io.sstable.IndexSummary.fillTemporaryKey(IndexSummary.java:162)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.io.sstable.IndexSummary.binarySearch(IndexSummary.java:121)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.io.sstable.format.SSTableReader.getSampleIndexesForRanges(SSTableReader.java:1398)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.io.sstable.format.SSTableReader.estimatedKeysForRanges(SSTableReader.java:1354)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.db.compaction.AbstractCompactionStrategy.worthDroppingTombstones(AbstractCompactionStrategy.java:403)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.db.compaction.LeveledCompactionStrategy.findDroppableSSTable(LeveledCompactionStrategy.java:412)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.db.compaction.LeveledCompactionStrategy.getNextBackgroundTask(LeveledCompactionStrategy.java:101)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.db.compaction.WrappingCompactionStrategy.getNextBackgroundTask(WrappingCompactionStrategy.java:88)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionCandidate.run(CompactionManager.java:250)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) 
~[na:1.8.0_74]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) 
~[na:1.8.0_74]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
~[na:1.8.0_74]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
[na:1.8.0_74]
        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_74]
ERROR [CompactionExecutor:13996] 2016-05-26 21:21:46,702 
CassandraDaemon.java:185 - Exception in thread 
Thread[CompactionExecutor:13996,1,main]
java.lang.AssertionError: Memory was freed
        at 
org.apache.cassandra.io.util.SafeMemory.checkBounds(SafeMemory.java:103) 
~[apache-cassandra-2.2.5.jar:2.2.5]
        at org.apache.cassandra.io.util.Memory.getInt(Memory.java:292) 
~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.io.sstable.IndexSummary.getPositionInSummary(IndexSummary.java:148)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.io.sstable.IndexSummary.fillTemporaryKey(IndexSummary.java:162)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.io.sstable.IndexSummary.binarySearch(IndexSummary.java:121)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.io.sstable.format.SSTableReader.getSampleIndexesForRanges(SSTableReader.java:1398)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.io.sstable.format.SSTableReader.estimatedKeysForRanges(SSTableReader.java:1354)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.db.compaction.AbstractCompactionStrategy.worthDroppingTombstones(AbstractCompactionStrategy.java:403)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.db.compaction.LeveledCompactionStrategy.findDroppableSSTable(LeveledCompactionStrategy.java:412)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.db.compaction.LeveledCompactionStrategy.getNextBackgroundTask(LeveledCompactionStrategy.java:101)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.db.compaction.WrappingCompactionStrategy.getNextBackgroundTask(WrappingCompactionStrategy.java:88)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
org.apache.cassandra.db.compaction.CompactionManager$BackgroundCompactionCandidate.run(CompactionManager.java:250)
 ~[apache-cassandra-2.2.5.jar:2.2.5]
        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) 
~[na:1.8.0_74]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) 
~[na:1.8.0_74]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
~[na:1.8.0_74]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
[na:1.8.0_74]
        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_74]
{code}



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