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Date: Fri, 13 May 2011 15:29:41 -0700
Message-ID: <BANLkTi=McggfjZtPSv7WbqoUWayKc_bR7A@mail.gmail.com>
Subject: Re: How to invoke getNaturalEndpoints with jconsole?
From: Maki Watanabe <watanabe.maki@gmail.com>
To: user@cassandra.apache.org
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I did not drop the keyspace, but your comment lead me to resolution.
I found cassandra-cli is not case sensitive on keyspace. I used
keyspace name FooBar on cassandra-cli, but it was Foobar in correct.
cassandra-cli didn't complain on my mistake, but the JMX interface is
less tolerance.
If I use correct name, the tool runs fine.

Thanks.

2011/5/13 Alex Araujo <cassandra-users@alex.otherinbox.com>:
> On 5/13/11 10:08 AM, Maki Watanabe 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
>> =A0 =A0 =A0 =A0at
>> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.rethrow(DefaultMBe=
anServerInterceptor.java:877)
>> [snip]
>> =A0 =A0 =A0 =A0at
>> javax.management.remote.rmi.RMIConnector$RemoteMBeanServerConnection.inv=
oke(RMIConnector.java:993)
>> =A0 =A0 =A0 =A0at my.test.getNaturalEndpoints.main(getNaturalEndpoints.j=
ava:32)
>> Caused by: java.lang.NullPointerException
>> =A0 =A0 =A0 =A0at
>> org.apache.cassandra.db.Table.createReplicationStrategy(Table.java:266)
>> =A0 =A0 =A0 =A0at org.apache.cassandra.db.Table.<init>(Table.java:212)
>> =A0 =A0 =A0 =A0at org.apache.cassandra.db.Table.open(Table.java:106)
>> =A0 =A0 =A0 =A0at
>> org.apache.cassandra.service.StorageService.getNaturalEndpoints(StorageS=
ervice.java:1497)
>> [snip]
>> =A0 =A0 =A0 =A0at
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja=
va:603)
>> =A0 =A0 =A0 =A0at java.lang.Thread.run(Thread.java:636)
>>
> Did you by chance see this after dropping the keyspace? =A0I believe I've=
 seen
> this as well. =A0If so (and if I'm interpreting the stack trace and code
> correctly) it might be related to queuing an op for a keyspace that's bee=
n
> dropped without checking if its metadata is null rather than your code.
>


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