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From Brandon Williams <dri...@gmail.com>
Subject Re: Ec2Snitch
Date Thu, 11 Aug 2011 01:45:36 GMT
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
>
>

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