Upgraded one ring that has four nodes from 0.8.0 to 0.8.5 with only one minor problem. It relates to Ec2Snitch when running a 'nodetool ring' from two of the four nodes. the rest are all working fine:
Address DC Rack Status State Load Owns Token 148362247927262972740864614603570725035 172.16.12.11 ap-southeast1a Up Normal 1.58 MB 24.02% 19095547144942516281182777765338228798 172.16.12.10 ap-southeast1a Up Normal 1.63 MB 22.11% 56713727820156410577229101238628035242 172.16.14.10 ap-southeast1b Up Normal 1.85 MB 33.33% 113427455640312821154458202477256070484 172.16.14.12 ap-southeast1b Up Normal 1.36 MB 20.53% 14836224792726297274086461460357072503 works ... on 2 nodes which happen to be on the 172.16.14.0/24 network. the nodes where the error appears are on the 172.16.12.0/24 network and this is what is shown when nodetool ring is run: Address DC Rack Status State Load Owns Token 148362247927262972740864614603570725035 172.16.12.11 ap-southeast1a Up Normal 1.58 MB 24.02% 19095547144942516281182777765338228798 172.16.12.10 ap-southeast1a Up Normal 1.62 MB 22.11% 56713727820156410577229101238628035242 Exception in thread "main" 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.EndpointSnitchInfo.getDatacenter(EndpointSnitchInfo.java:49) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:93) at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:27) at com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:208) at com.sun.jmx.mbeanserver.PerInterface.invoke(PerInterface.java:120) at com.sun.jmx.mbeanserver.MBeanSupport.invoke(MBeanSupport.java:262) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761) at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1427) at javax.management.remote.rmi.RMIConnectionImpl.access$200(RMIConnectionImpl.java:72) at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1265) at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1360) at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:788) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305) at sun.rmi.transport.Transport$1.run(Transport.java:159) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:155) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) I've stopped the node and started it ... still doesn't make a difference. I've also shut down all nodes in the ring so that it was fully offline, and then brought them all back up ... issue still persists on two of the nodes. There are no firewall rules restricting traffic between these nodes. For example, on a node where the ring throws the exception, the two hosts that don't show up i can still get nestats for: nodetool -h 172.16.12.11 -p 9090 netstats 172.16.14.10 Mode: Normal Nothing streaming to /172.16.14.10 Nothing streaming from /172.16.14.10 Pool Name Active Pending Completed Commands n/a 0 3 Responses n/a 1 1483 nodetool -h 172.16.12.11 -p 9090 netstats 172.16.14.12 Mode: Normal Nothing streaming to /172.16.14.12 Nothing streaming from /172.16.14.12 Pool Name Active Pending Completed Commands n/a 0 3 Responses n/a 0 1784 -sd
