Out of memory error in cassandra

[Anurag Gujral]

Hi All,
           I am getting following error from cassandra:
ERROR [ReadStage:23] 2011-07-10 17:19:18,300
DebuggableThreadPoolExecutor.java (line 103) Error in ThreadPoolExecutor
java.lang.OutOfMemoryError: Java heap space
        at
org.apache.cassandra.utils.BloomFilterSerializer.deserialize(BloomFilterSerializer.java:49)
        at
org.apache.cassandra.utils.BloomFilterSerializer.deserialize(BloomFilterSerializer.java:30)
        at
org.apache.cassandra.io.sstable.IndexHelper.defreezeBloomFilter(IndexHelper.java:117)
        at
org.apache.cassandra.io.sstable.IndexHelper.defreezeBloomFilter(IndexHelper.java:94)
        at
org.apache.cassandra.db.columniterator.SSTableNamesIterator.read(SSTableNamesIterator.java:107)
        at
org.apache.cassandra.db.columniterator.SSTableNamesIterator.<init>(SSTableNamesIterator.java:72)
        at
org.apache.cassandra.db.filter.NamesQueryFilter.getSSTableColumnIterator(NamesQueryFilter.java:59)
        at
org.apache.cassandra.db.filter.QueryFilter.getSSTableColumnIterator(QueryFilter.java:80)
        at
org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFamilyStore.java:1311)
        at
org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1203)
        at
org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1131)
        at org.apache.cassandra.db.Table.getRow(Table.java:333)
        at
org.apache.cassandra.db.SliceByNamesReadCommand.getRow(SliceByNamesReadCommand.java:60)
        at
org.apache.cassandra.db.ReadVerbHandler.doVerb(ReadVerbHandler.java:69)
        at
org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:72)
        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)
 INFO [ScheduledTasks:1] 2011-07-10 17:19:18,306 StatusLogger.java (line 66)
RequestResponseStage              0         0
ERROR [ReadStage:23] 2011-07-10 17:19:18,306 AbstractCassandraDaemon.java
(line 114) Fatal exception in thread Thread[ReadStage:23,5,main]
java.lang.OutOfMemoryError: Java heap space
        at
org.apache.cassandra.utils.BloomFilterSerializer.deserialize(BloomFilterSerializer.java:49)
        at
org.apache.cassandra.utils.BloomFilterSerializer.deserialize(BloomFilterSerializer.java:30)
        at
org.apache.cassandra.io.sstable.IndexHelper.defreezeBloomFilter(IndexHelper.java:117)
        at
org.apache.cassandra.io.sstable.IndexHelper.defreezeBloomFilter(IndexHelper.java:94)
        at
org.apache.cassandra.db.columniterator.SSTableNamesIterator.read(SSTableNamesIterator.java:107)
        at
org.apache.cassandra.db.columniterator.SSTableNamesIterator.<init>(SSTableNamesIterator.java:72)
        at
org.apache.cassandra.db.filter.NamesQueryFilter.getSSTableColumnIterator(NamesQueryFilter.java:59)
        at
org.apache.cassandra.db.filter.QueryFilter.getSSTableColumnIterator(QueryFilter.java:80)
        at
org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFamilyStore.java:1311)
        at
org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1203)
        at
org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1131)


Can someone please help debug this? The maximum heap size is 28G .

I am not sure why cassandra is giving Out of memory error here.

Thanks
Anurag