We're using version 1.0.  The following exception shows up in the system log periodically.  What might be causing this exception?  Attached is the full system.log.
 
Thanks,
 
Andy
 
 
ERROR [ReadStage:1761] 2011-10-25 12:17:16,088 AbstractCassandraDaemon.java (line 133) Fatal exception in thread Thread[ReadStage:1761,5,main]
java.lang.RuntimeException: error reading 5 of 5
        at org.apache.cassandra.db.columniterator.SimpleSliceReader.computeNext(SimpleSliceReader.java:83)
        at org.apache.cassandra.db.columniterator.SimpleSliceReader.computeNext(SimpleSliceReader.java:40)
        at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:140)
        at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:135)
        at org.apache.cassandra.db.columniterator.SSTableSliceIterator.hasNext(SSTableSliceIterator.java:107)
        at org.apache.cassandra.utils.MergeIterator$Candidate.advance(MergeIterator.java:145)
        at org.apache.cassandra.utils.MergeIterator$ManyToOne.advance(MergeIterator.java:124)
        at org.apache.cassandra.utils.MergeIterator$ManyToOne.computeNext(MergeIterator.java:98)
        at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:140)
        at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:135)
        at org.apache.cassandra.db.filter.SliceQueryFilter.collectReducedColumns(SliceQueryFilter.java:116)
        at org.apache.cassandra.db.filter.QueryFilter.collateColumns(QueryFilter.java:144)
        at org.apache.cassandra.db.CollationController.collectAllData(CollationController.java:225)
        at org.apache.cassandra.db.CollationController.getTopLevelColumns(CollationController.java:61)
        at org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFamilyStore.java:1297)
        at org.apache.cassandra.db.ColumnFamilyStore.cacheRow(ColumnFamilyStore.java:1128)
        at org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1157)
        at org.apache.cassandra.db.ColumnFamilyStore.getColumnFamily(ColumnFamilyStore.java:1114)
        at org.apache.cassandra.db.Table.getRow(Table.java:388)
        at org.apache.cassandra.db.SliceByNamesReadCommand.getRow(SliceByNamesReadCommand.java:58)
        at org.apache.cassandra.db.ReadVerbHandler.doVerb(ReadVerbHandler.java:62)
        at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:59)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)
Caused by: org.apache.cassandra.db.ColumnSerializer$CorruptColumnException: invalid column name length 0
        at org.apache.cassandra.db.ColumnSerializer.deserialize(ColumnSerializer.java:89)
        at org.apache.cassandra.db.ColumnSerializer.deserialize(ColumnSerializer.java:82)
        at org.apache.cassandra.db.ColumnSerializer.deserialize(ColumnSerializer.java:72)
        at org.apache.cassandra.db.ColumnSerializer.deserialize(ColumnSerializer.java:36)
        at org.apache.cassandra.db.columniterator.SimpleSliceReader.computeNext(SimpleSliceReader.java:79)
        ... 24 more