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From Viliam Holub <viliam.ho...@ucd.ie>
Subject Re: Ec2Snitch
Date Thu, 11 Aug 2011 15:08:25 GMT

Yup, work perfectly now.

Thanks,
V.

On 10. Aug (Wednesday) v 20:45:36 -0500 2011, Brandon Williams wrote:
> You probably have other nodes that are NOT using the snitch yet, so
> they haven't populated DC/RACK info yet.  The exceptions will stop
> when all snitches have been changed.
> 
> On Wed, Aug 10, 2011 at 7:55 PM, Viliam Holub <viliam.holub@ucd.ie> wrote:
> >
> > Hi,
> >
> > I tried to switch to Ec2Snith. Although it correctly found the region:
> >
> > INFO 23:18:00,643 EC2Snitch using region: eu-west, zone: 1a.
> >
> > it started to report NullPointerException every second:
> >
> > ERROR 00:23:40,268 Internal error processing get_slice
> > java.lang.NullPointerException
> >        at org.apache.cassandra.locator.Ec2Snitch.getDatacenter(Ec2Snitch.java:93)
> >        at org.apache.cassandra.locator.DynamicEndpointSnitch.getDatacenter(DynamicEndpointSnitch.java:122)
> >        at org.apache.cassandra.locator.OldNetworkTopologyStrategy.calculateNaturalEndpoints(OldNetworkTopologyStrategy.java:64)
> >        at org.apache.cassandra.locator.AbstractReplicationStrategy.getNaturalEndpoints(AbstractReplicationStrategy.java:99)
> >        at org.apache.cassandra.service.StorageService.getLiveNaturalEndpoints(StorageService.java:1708)
> >        at org.apache.cassandra.service.StorageService.getLiveNaturalEndpoints(StorageService.java:1702)
> >        at org.apache.cassandra.service.StorageProxy.fetchRows(StorageProxy.java:511)
> >        at org.apache.cassandra.service.StorageProxy.read(StorageProxy.java:480)
> >        at org.apache.cassandra.thrift.CassandraServer.readColumnFamily(CassandraServer.java:126)
> >        at org.apache.cassandra.thrift.CassandraServer.getSlice(CassandraServer.java:280)
> >        at org.apache.cassandra.thrift.CassandraServer.multigetSliceInternal(CassandraServer.java:362)
> >        at org.apache.cassandra.thrift.CassandraServer.get_slice(CassandraServer.java:323)
> >        at org.apache.cassandra.thrift.Cassandra$Processor$get_slice.process(Cassandra.java:3033)
> >        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.runWorker(ThreadPoolExecutor.java:1110)
> >        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> >        at java.lang.Thread.run(Thread.java:636)
> >
> > Am I doing something wrong?
> >
> > Thanks,
> > Viliam
> >
> >

-- 
Viliam Holub
School of Computer Science and Informatics
University College Dublin, Ireland

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