sounds like https://issues.apache.org/jira/browse/CASSANDRA-2353
On Fri, May 13, 2011 at 10:08 AM, Maki Watanabe <watanabe.m...@gmail.com> wrote: > I wrote a small JMX client to invoke getNaturalEndpoints. > It works fine at my test environment, but throws NPE for keyspace we > will use for our application (both 0.7.5). > Does anyone know quick resolution of that before I setting up > cassandra on eclipse to inspect what happens :) > > thanks > > Exception in thread "main" javax.management.RuntimeMBeanException: > java.lang.NullPointerException > at > com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrow(DefaultMBeanServerInterceptor.java:877) > [snip] > at > javax.management.remote.rmi.RMIConnector$RemoteMBeanServerConnection.invoke(RMIConnector.java:993) > at my.test.getNaturalEndpoints.main(getNaturalEndpoints.java:32) > Caused by: java.lang.NullPointerException > at > org.apache.cassandra.db.Table.createReplicationStrategy(Table.java:266) > at org.apache.cassandra.db.Table.<init>(Table.java:212) > at org.apache.cassandra.db.Table.open(Table.java:106) > at > org.apache.cassandra.service.StorageService.getNaturalEndpoints(StorageService.java:1497) > [snip] > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) > at java.lang.Thread.run(Thread.java:636) > > > 2011/5/11 Jonathan Ellis <jbel...@gmail.com>: >> Thanks! >> >> On Wed, May 11, 2011 at 10:20 AM, Maki Watanabe <watanabe.m...@gmail.com> >> wrote: >>> Add a new faq: >>> http://wiki.apache.org/cassandra/FAQ#jconsole_array_arg >>> >>> 2011/5/11 Nick Bailey <n...@datastax.com>: >>>> Yes. >>>> >>>> On Wed, May 11, 2011 at 8:25 AM, Maki Watanabe <watanabe.m...@gmail.com> >>>> wrote: >>>>> Thanks, >>>>> >>>>> So my options are: >>>>> 1. Write a thrift client code to call describe_ring with hashed key >>>>> or >>>>> 2. Write a JMX client code to call getNaturalEndpoints >>>>> >>>>> right? >>>>> >>>>> 2011/5/11 Nick Bailey <n...@datastax.com>: >>>>>> As far as I know you can not call getNaturalEndpoints from jconsole >>>>>> because it takes a byte array as a parameter and jconsole doesn't >>>>>> provide a way for inputting a byte array. You might be able to use the >>>>>> thrift call 'describe_ring' to do what you want though. You will have >>>>>> to manually hash your key to see what range it falls in however. >>>>>> >>>>>> On Wed, May 11, 2011 at 6:14 AM, Maki Watanabe <watanabe.m...@gmail.com> >>>>>> wrote: >>>>>>> Hello, >>>>>>> It's a question on jconsole rather than cassandra, how can I invoke >>>>>>> getNaturalEndpoints with jconsole? >>>>>>> >>>>>>> org.apache.cassandra.service.StorageService.Operations.getNaturalEndpoints >>>>>>> >>>>>>> I want to run this method to find nodes which are responsible to store >>>>>>> data for specific row key. >>>>>>> I can find this method on jconsole but I can't invoke it because the >>>>>>> button is gray out and doesn't accept >>>>>>> click. >>>>>>> >>>>>>> Thanks, >>>>>>> -- >>>>>>> maki >>>>>>> >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> w3m >>>>> >>>> >>> >>> >>> >>> -- >>> w3m >>> >> >> >> >> -- >> Jonathan Ellis >> Project Chair, Apache Cassandra >> co-founder of DataStax, the source for professional Cassandra support >> http://www.datastax.com >> > > > > -- > w3m > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
