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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Merged counter shard with a count != 0
Date Sun, 14 Aug 2011 23:34:14 GMT
Did you try what it says to do first? "You need to restart this node
with -Dcassandra.renew_counter_id=true to fix."

On Sun, Aug 14, 2011 at 12:28 PM, Philippe <watcherfr@gmail.com> wrote:
> 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-counters
> I 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)
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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