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From Shu Zhang <szh...@mediosystems.com>
Subject regarding CASSANDRA-2653
Date Tue, 28 Jun 2011 00:23:13 GMT
Hi all, I just stumbled on to what looks like issue CASSANDRA-2653. Here's my stack trace:

ERROR [ReadStage:10] 2011-06-27 15:22:36,087 AbstractCassandraDaemon.java (line 114) Fatal
exception in thread Thread[ReadStage:10,5,main]
java.lang.AssertionError: No data found for NamesQueryFilter(columns=java.nio.HeapByteBuffer[pos=12
lim=21 cap=22]) in DecoratedKey(102020034675873608148572353603207993225, c295):QueryPath(columnFamilyName='XXX',
superColumnName='null', columnName='null') (original filter NamesQueryFilter(columns=java.nio.HeapByteBuffer[pos=12
lim=21 cap=22])) from expression 'XXXX EQ XXXX'
        at org.apache.cassandra.db.ColumnFamilyStore.scan(ColumnFamilyStore.java:1603)
        at org.apache.cassandra.service.IndexScanVerbHandler.doVerb(IndexScanVerbHandler.java:42)
        at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:72)
        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:619)

I am on version 0.7.6.

My question is, why is that ticket marked as minor? Does that mean most people are not encountering
this problem on index queries? If that's the case I'd really like to understand the conditions
under which this problem occurs so I can at least work around it. I am doing an indexslicequery,
specifying a column family, a single column name and an equals expression. For my client,
I'm using hector version 0.7.0-29.

I'd also like to know when this bug is expected to be fixed and when 0.7.7 might be released.
I have 0.7.5 running in production right now and I really need an upgrade to resolve different
bug.

Thanks,
Shu
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