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From "sj.climber" <sj.clim...@gmail.com>
Subject NullPointerException when requesting compactionstats through nodetool
Date Wed, 06 Jun 2012 23:49:32 GMT
Hi,

I'm currently testing a 2-node 1.1.1 cluster with replication factor set to
2.  I have a column family C with the following definition:

create column family C with caching = 'keys_only' and key_validation_class =
'LongType' and compression_options = { sstable_compression:
SnappyCompressor, chunk_length_kb: 64 } and max_compaction_threshold=0;

max_compaction_threshold is set to 0 to disable automatic compression.

After streaming sstables through cassandra/bin/sstableloader, I force a
major compaction using "nodetool -h host1 compact MyKeyspace C".

Looking at the data file directory, it's clear that the major compaction is
progressing.  However, I am unable to get stats on the compaction.  More
specifically, "nodetool -h host1 compactionstats" yields the following
NullPointerException.

Exception in thread "main" java.lang.NullPointerException
	at
org.apache.cassandra.db.compaction.CompactionInfo.asMap(CompactionInfo.java:103)
	at
org.apache.cassandra.db.compaction.CompactionManager.getCompactions(CompactionManager.java:1115)
	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.getAttribute(PerInterface.java:65)
	at com.sun.jmx.mbeanserver.MBeanSupport.getAttribute(MBeanSupport.java:216)
	at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:666)
	at
com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:638)
	at
javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1404)
	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.getAttribute(RMIConnectionImpl.java:600)
	at sun.reflect.GeneratedMethodAccessor12.invoke(Unknown Source)
	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:303)
	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)

Ideas?  Thanks in advance!

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