[CASSANDRA-3114] After Choosing EC2Snitch you can't migrate off w/o a full cluster restart

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Severity: Normal
• Assignee: Unassigned
• Reporter: Benjamin Coverston
• Created: 31/Aug/11 20:40
• Updated: 16/Apr/19 09:32
• Resolved: 16/Nov/11 21:47

Description

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)

Issue Links

• is related to: CASSANDRA-3186 nodetool should not NPE when rack/dc info is not yet available
• relates to: CASSANDRA-3186 nodetool should not NPE when rack/dc info is not yet available