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From "Benedict (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-6948) Native & ReplicateOnWriteStage AssertionError: Callback already exists
Date Fri, 28 Mar 2014 16:54:18 GMT


Benedict commented on CASSANDRA-6948:

bq. So perhaps its related to just the total number of write operations?

The exceptions can only plausibly manifest after 4B write operations, however the _cause_
of the exceptions will be occurring earlier, and probably resulting in increased heap utilisation
and a steady burdening of the server.

bq. Worked fine for me after I gunzip. If there still doesn't work, I can try extracting the
relevant stacktraces.

Weird. It's possible gunzip isn't behaving, but I consistently get a 300MB nonsense file (again,
I'm assuming it's meant to be a text file and not a heap dump - but jhat didn't like it either).
If you _could_ extract the relevant stack traces that would be great. Also, those earlier
log files from one of these servers would be great. It would be very helpful to get a full
history from startup to first exception.

> Native & ReplicateOnWriteStage AssertionError: Callback already exists
> ----------------------------------------------------------------------
>                 Key: CASSANDRA-6948
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Keith Wright
>            Assignee: Benedict
>         Attachments: 6948.debug.txt, Screen Shot 2014-03-28 at 11.27.56 AM.png, Screen
Shot 2014-03-28 at 11.29.24 AM.png, cassandra.log.gz, cassandra.yaml, logs.old.tar.gz, logs.tar.gz,
system.log.1.gz, system.log.gz
> We are using the datastax driver and have seen the following exceptions appear periodically
in our cluster in "groups".  The client will gradually start sending less write requests to
the nodes where this occurs the most often.  This may be related to CASSANDRA-6476.  Exception
from logs:
> ERROR [Native-Transport-Requests:7636] 2014-03-28 13:32:10,638 (line
222) Unexpected exception during request
> java.lang.AssertionError: Callback already exists for id -1665979622! (CallbackInfo(target=/,
callback=org.apache.cassandra.service.WriteResponseHandler@5d36d8ea, serializer=org.apache.cassandra.db.WriteResponse$WriteResponseSerializer@6ed37f0b))
> 	at
> 	at
> 	at org.apache.cassandra.service.StorageProxy.mutateCounter(
> 	at org.apache.cassandra.service.StorageProxy.mutate(
> 	at org.apache.cassandra.service.StorageProxy.mutateWithTriggers(
> 	at org.apache.cassandra.cql3.statements.ModificationStatement.executeWithoutCondition(
> 	at org.apache.cassandra.cql3.statements.ModificationStatement.execute(
> 	at org.apache.cassandra.cql3.QueryProcessor.processStatement(
> 	at org.apache.cassandra.cql3.QueryProcessor.processPrepared(
> 	at org.apache.cassandra.transport.messages.ExecuteMessage.execute(
> 	at org.apache.cassandra.transport.Message$Dispatcher.messageReceived(
> 	at org.jboss.netty.handler.execution.ChannelUpstreamEventRunnable.doRun(
> 	at
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(
> 	at java.util.concurrent.ThreadPoolExecutor$
> 	at
> ERROR [ReplicateOnWriteStage:102766] 2014-03-28 13:32:10,638 (line
196) Exception in thread Thread[ReplicateOnWriteStage:102766,5,main]
> java.lang.AssertionError: Callback already exists for id -1665979620! (CallbackInfo(target=/,
callback=org.apache.cassandra.service.WriteResponseHandler@3bdb1a75, serializer=org.apache.cassandra.db.WriteResponse$WriteResponseSerializer@6ed37f0b))
> 	at
> 	at
> 	at org.apache.cassandra.service.StorageProxy.sendToHintedEndpoints(
> 	at org.apache.cassandra.service.StorageProxy$8$1.runMayThrow(
> 	at org.apache.cassandra.service.StorageProxy$
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(
> 	at java.util.concurrent.ThreadPoolExecutor$
> 	at

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