Yes, the exception is for CounterColumn on Standard column family.

 

Created https://issues.apache.org/jira/browse/CASSANDRA-3870

 

 

 

Best regards/ Pagarbiai

 

Viktor Jevdokimov

Senior Developer

 

Email:  Viktor.Jevdokimov@adform.com

Phone: +370 5 212 3063. Fax: +370 5 261 0453

J. Jasinskio 16C, LT-01112 Vilnius, Lithuania

 

 

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From: aaron morton [mailto:aaron@thelastpickle.com]
Sent: Monday, February 06, 2012 21:03
To: user@cassandra.apache.org
Subject: Re: Internal error processing batch_mutate java.util.ConcurrentModificationException

 

That looks like a bug. Were you writing counters ? 

 

 

Can you please add it here https://issues.apache.org/jira/browse/CASSANDRA , include some information on the request that caused it and email the bug report back to the list. 

 

(note to self) I *think* the problem is the counter WritePerformer implementations are put into the REPLICATE_ON_WRITE TP and then update the hints on the AbstractWriteResponeHandler asynchronously. This could happen after the write thread has move on to wait on the handlers which involves waiting on the hints futures. 

 

thanks

 

-----------------

Aaron Morton

Freelance Developer

@aaronmorton

 

On 4/02/2012, at 4:49 AM, Viktor Jevdokimov wrote:



What may be cause of the following exception in 1.0.7 Cassandra:

 

ERROR [Thrift:134] 2012-02-03 15:51:02,800 Cassandra.java (line 3462) Internal error processing batch_mutate

java.util.ConcurrentModificationException

        at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)

        at java.util.AbstractList$Itr.next(AbstractList.java:343)

        at org.apache.cassandra.utils.FBUtilities.waitOnFutures(FBUtilities.java:532)

        at org.apache.cassandra.service.AbstractWriteResponseHandler.waitForHints(AbstractWriteResponseHandler.java:89)

        at org.apache.cassandra.service.AbstractWriteResponseHandler.get(AbstractWriteResponseHandler.java:58)

        at org.apache.cassandra.service.StorageProxy.mutate(StorageProxy.java:201)

        at org.apache.cassandra.thrift.CassandraServer.doInsert(CassandraServer.java:639)

        at org.apache.cassandra.thrift.CassandraServer.internal_batch_mutate(CassandraServer.java:590)

        at org.apache.cassandra.thrift.CassandraServer.batch_mutate(CassandraServer.java:598)

        at org.apache.cassandra.thrift.Cassandra$Processor$batch_mutate.process(Cassandra.java:3454)

        at org.apache.cassandra.thrift.Cassandra$Processor.process(Cassandra.java:2889)

        at org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(CustomTThreadPoolServer.java:187)

        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)

 

 

 

Best regards/ Pagarbiai

 

Viktor Jevdokimov

Senior Developer

 

Phone: +370 5 212 3063. Fax: +370 5 261 0453

J. Jasinskio 16C, LT-01112 Vilnius, Lithuania

 

 

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