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From Philippe <watche...@gmail.com>
Subject Merged counter shard with a count != 0
Date Sun, 14 Aug 2011 17:28:54 GMT
Hi I'm getting the following at startup on one of the nodes on my 3 node
cluster with RF=3.
I have 6 keyspaces each with 10 column families that contain supercolumns
that contain only counter columns.

Looking at
http://www.datastax.com/dev/blog/whats-new-in-cassandra-0-8-part-2-countersI
see that I am supposed to "remove
all data for that column family".
Does looking at the previous line for the same thread tell me which column
family this is happening to ?
How do I "remove the data" on that node ?

Thanks

ERROR [CompactionExecutor:6] 2011-08-14 19:02:55,117
AbstractCassandraDaemon.java (line 134) Fatal exception in thread
Thread[CompactionExecutor:6,1,main]
java.lang.RuntimeException: Merged counter shard with a count != 0 (likely
due to #2968). You need to restart this node with
-Dcassandra.renew_counter_id=true to fix.
        at
org.apache.cassandra.db.context.CounterContext.removeOldShards(CounterContext.java:633)
        at
org.apache.cassandra.db.CounterColumn.removeOldShards(CounterColumn.java:237)
        at
org.apache.cassandra.db.CounterColumn.removeOldShards(CounterColumn.java:273)
        at
org.apache.cassandra.db.compaction.PrecompactedRow.removeDeletedAndOldShards(PrecompactedRow.java:67)
        at
org.apache.cassandra.db.compaction.PrecompactedRow.removeDeletedAndOldShards(PrecompactedRow.java:60)
        at
org.apache.cassandra.db.compaction.PrecompactedRow.<init>(PrecompactedRow.java:75)
        at
org.apache.cassandra.db.compaction.CompactionController.getCompactedRow(CompactionController.java:140)
        at
org.apache.cassandra.db.compaction.CompactionIterator.getReduced(CompactionIterator.java:123)
        at
org.apache.cassandra.db.compaction.CompactionIterator.getReduced(CompactionIterator.java:43)
        at
org.apache.cassandra.utils.ReducingIterator.computeNext(ReducingIterator.java:74)
        at
com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:140)
        at
com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:135)
        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.compaction.CompactionManager.doCompactionWithoutSizeEstimation(CompactionManager.java:569)
        at
org.apache.cassandra.db.compaction.CompactionManager.doCompaction(CompactionManager.java:506)
        at
org.apache.cassandra.db.compaction.CompactionManager$1.call(CompactionManager.java:141)
        at
org.apache.cassandra.db.compaction.CompactionManager$1.call(CompactionManager.java:107)
        at
java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)

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