This is a server side timeout. 

Consistent Level nodes did not respond to the coordinator within rpc_timeout. The nodes may have been overloaded, check the nodetool tpstats. It will tell you if the node is backing up and if it has dropped messages. 

Cheers

-----------------
Aaron Morton
Freelance Developer
@aaronmorton

On 8/09/2012, at 3:08 AM, Adeel Akbar <adeel.akbar@panasiangroup.com> wrote:

Hi, I have successfully upgraded 2 nodes ring Cassandra with latest version. After up-gradation, I found following exceptions. Please help me to resolve this issue.

[2012-09-07 19:36:44,232] |TimedOutException()
me.prettyprint.hector.api.exceptions.HTimedOutException: TimedOutException()
        at me.prettyprint.cassandra.service.ExceptionsTranslatorImpl.translate(ExceptionsTranslatorImpl.java:35)
        at me.prettyprint.cassandra.service.KeyspaceServiceImpl$11.execute(KeyspaceServiceImpl.java:432)
        at me.prettyprint.cassandra.service.KeyspaceServiceImpl$11.execute(KeyspaceServiceImpl.java:416)
        at me.prettyprint.cassandra.service.Operation.executeAndSetResult(Operation.java:103)
        at me.prettyprint.cassandra.connection.HConnectionManager.operateWithFailover(HConnectionManager.java:258)
        at me.prettyprint.cassandra.service.KeyspaceServiceImpl.operateWithFailover(KeyspaceServiceImpl.java:131)
        at me.prettyprint.cassandra.service.KeyspaceServiceImpl.getSuperSlice(KeyspaceServiceImpl.java:436)
        at me.prettyprint.cassandra.model.thrift.ThriftSuperSliceQuery$1.doInKeyspace(ThriftSuperSliceQuery.java:61)
        at me.prettyprint.cassandra.model.thrift.ThriftSuperSliceQuery$1.doInKeyspace(ThriftSuperSliceQuery.java:57)
        at me.prettyprint.cassandra.model.KeyspaceOperationCallback.doInKeyspaceAndMeasure(KeyspaceOperationCallback.java:20)
        at me.prettyprint.cassandra.model.ExecutingKeyspace.doExecute(ExecutingKeyspace.java:85)
        at me.prettyprint.cassandra.model.thrift.ThriftSuperSliceQuery.execute(ThriftSuperSliceQuery.java:56)
        at pringcore.database.dao.cassandra.PringerRecommendationDAOImp.getRecommendedToPringers(PringerRecommendationDAOImp.java:64)
        at pringcore.database.dao.cassandra.PringerRecommendationDAOImp.getRecommendations(PringerRecommendationDAOImp.java:75)
        at pringcore.database.Pringer.getRecommendations(Pringer.java:2109)
        at pringcore.database.Follower.getFollowerMessageOnStatus(Follower.java:459)
        at pringcore.commands.CoreFollowCommand.process(CoreFollowCommand.java:64)
        at smsprocessor.commands.FollowCommand.process(FollowCommand.java:34)
        at pringcore.processor.CoreCommandProcessor.process(CoreCommandProcessor.java:263)
        at smsprocessor.processor.CommandProcessor.run(CommandProcessor.java:164)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:722)
Caused by: TimedOutException()
        at org.apache.cassandra.thrift.Cassandra$get_slice_result.read(Cassandra.java:7212)
        at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
        at org.apache.cassandra.thrift.Cassandra$Client.recv_get_slice(Cassandra.java:543)
        at org.apache.cassandra.thrift.Cassandra$Client.get_slice(Cassandra.java:527)
        at me.prettyprint.cassandra.service.KeyspaceServiceImpl$11.execute(KeyspaceServiceImpl.java:421)
        ... 24 more
--


Thanks & Regards

Adeel Akbar