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From Ravikumar Govindarajan <ravikumar.govindara...@gmail.com>
Subject MurmurHash NPE during compaction
Date Thu, 14 Jun 2012 11:38:00 GMT
We received the following NPE during compaction of a large row. We are on
cassandra-1.0.7. Need some help here to find the root cause of the issue

 ERROR [CompactionExecutor:595] 2012-06-13 09:44:46,718
AbstractCassandraDaemon.java (line 139) Fatal exception in thread
Thread[CompactionExecutor:595,1,main]
java.lang.NullPointerException
        at org.apache.cassandra.utils.MurmurHash.hash64(MurmurHash.java:102)
        at
org.apache.cassandra.utils.BloomFilter.getHashBuckets(BloomFilter.java:103)
        at
org.apache.cassandra.utils.BloomFilter.getHashBuckets(BloomFilter.java:92)
        at org.apache.cassandra.utils.BloomFilter.add(BloomFilter.java:114)
        at
org.apache.cassandra.db.ColumnIndexer.serialize(ColumnIndexer.java:96)
        at
org.apache.cassandra.db.ColumnIndexer.serialize(ColumnIndexer.java:51)
        at
org.apache.cassandra.db.compaction.PrecompactedRow.write(PrecompactedRow.java:135)
        at
org.apache.cassandra.io.sstable.SSTableWriter.append(SSTableWriter.java:160)
        at
org.apache.cassandra.db.compaction.CompactionTask.execute(CompactionTask.java:159)
        at
org.apache.cassandra.db.compaction.CompactionManager$1.call(CompactionManager.java:134)
        at
org.apache.cassandra.db.compaction.CompactionManager$1.call(CompactionManager.java:114)
        at
java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)

Thanks and Regards,
Ravi

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