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From Chris Burroughs <chris.burrou...@gmail.com>
Subject Re: OOM exceptions
Date Fri, 04 Mar 2011 20:05:58 GMT
- Does this occur only during compaction or at seemingly random times?
- How large is your heap?  What jvm settings are you using? How much
physical RAM do you have?
- Do you have the row and/or key cache enabled?  How are they
configured?  How large are they when the OOM is thrown?

On 03/04/2011 02:38 PM, Mark Miller wrote:
> Other than adding more memory to the machine is there a way to solve
> this? Please help. Thanks
> 
> ERROR [COMPACTION-POOL:1] 2011-03-04 11:11:44,891 CassandraDaemon.java
> (line org.apache.cassandra.thrift.CassandraDaemon$1) Uncaught exception
> in thread Thread[COMPACTION-POOL:1,5,main]
> java.lang.OutOfMemoryError: Java heap space
>     at java.util.Arrays.copyOf(Arrays.java:2798)
>     at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:111)
>     at java.io.DataOutputStream.write(DataOutputStream.java:107)
>     at java.io.FilterOutputStream.write(FilterOutputStream.java:97)
>     at
> org.apache.cassandra.utils.FBUtilities.writeByteArray(FBUtilities.java:298)
>     at
> org.apache.cassandra.db.ColumnSerializer.serialize(ColumnSerializer.java:66)
> 
>     at
> org.apache.cassandra.db.SuperColumnSerializer.serialize(SuperColumn.java:311)
> 
>     at
> org.apache.cassandra.db.SuperColumnSerializer.serialize(SuperColumn.java:284)
> 
>     at
> org.apache.cassandra.db.ColumnFamilySerializer.serializeForSSTable(ColumnFamilySerializer.java:87)
> 
>     at
> org.apache.cassandra.db.ColumnFamilySerializer.serializeWithIndexes(ColumnFamilySerializer.java:99)
> 
>     at
> org.apache.cassandra.io.CompactionIterator.getReduced(CompactionIterator.java:140)
> 
>     at
> org.apache.cassandra.io.CompactionIterator.getReduced(CompactionIterator.java:43)
> 
>     at
> org.apache.cassandra.utils.ReducingIterator.computeNext(ReducingIterator.java:73)
> 
>     at
> com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:135)
> 
>     at
> com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:130)
> 
>     at
> org.apache.commons.collections.iterators.FilterIterator.setNextObject(FilterIterator.java:183)
> 
>     at
> org.apache.commons.collections.iterators.FilterIterator.hasNext(FilterIterator.java:94)
> 
>     at
> org.apache.cassandra.db.CompactionManager.doCompaction(CompactionManager.java:294)
> 
>     at
> org.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:101)
> 
>     at
> org.apache.cassandra.db.CompactionManager$1.call(CompactionManager.java:82)
>     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
>     at java.util.concurrent.FutureTask.run(FutureTask.java:166)
>     at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> 
>     at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> 
>     at java.lang.Thread.run(Thread.java:636)
> 


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