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From "Benjamin Coverston (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-3114) After Choosing EC2Snitch you can't migrate off w/o a full cluster restart
Date Wed, 31 Aug 2011 20:42:10 GMT
After Choosing EC2Snitch you can't migrate off w/o a full cluster restart
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                 Key: CASSANDRA-3114
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3114
             Project: Cassandra
          Issue Type: Bug
    Affects Versions: 0.8.4, 0.7.8
            Reporter: Benjamin Coverston


Once you choose the Ec2Snitch the gossip messages will trigger this exception if you try to
move (for example) to the property file snitch:

ERROR [pool-2-thread-11] 2011-08-30 16:38:06,935 Cassandra.java (line 3041) Internal error
processing get_slice 
java.lang.NullPointerException 
at org.apache.cassandra.locator.Ec2Snitch.getDatacenter(Ec2Snitch.java:84) 
at org.apache.cassandra.locator.DynamicEndpointSnitch.getDatacenter(DynamicEndpointSnitch.java:122)

at org.apache.cassandra.service.DatacenterReadCallback.assureSufficientLiveNodes(DatacenterReadCallback.java:77)

at org.apache.cassandra.service.StorageProxy.fetchRows(StorageProxy.java:516) 
at org.apache.cassandra.service.StorageProxy.read(StorageProxy.java:480) 
at org.apache.cassandra.thrift.CassandraServer.readColumnFamily(CassandraServer.java:109)

at org.apache.cassandra.thrift.CassandraServer.getSlice(CassandraServer.java:263) 
at org.apache.cassandra.thrift.CassandraServer.multigetSliceInternal(CassandraServer.java:345)

at org.apache.cassandra.thrift.CassandraServer.get_slice(CassandraServer.java:306) 
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$Worker.runTask(ThreadPoolExecutor.java:886) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) 
at java.lang.Thread.run(Thread.java:662)

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