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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4709) Hadoop metrics2 setup in test MiniDFSClusters spewing JMX errors
Date Mon, 26 Nov 2012 11:00:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13503727#comment-13503727
] 

Hadoop QA commented on HBASE-4709:
----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12554834/4709_workaround.v1.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 3 new or modified
tests.

    {color:green}+1 hadoop2.0{color}.  The patch compiles against the hadoop 2.0 profile.

    {color:red}-1 javadoc{color}.  The javadoc tool appears to have generated 98 warning messages.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:red}-1 findbugs{color}.  The patch appears to introduce 24 new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

     {color:red}-1 core tests{color}.  The patch failed these unit tests:
                       org.apache.hadoop.hbase.client.TestHCM

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/3400//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3400//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3400//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3400//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3400//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3400//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3400//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3400//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/3400//console

This message is automatically generated.
                
> Hadoop metrics2 setup in test MiniDFSClusters spewing JMX errors
> ----------------------------------------------------------------
>
>                 Key: HBASE-4709
>                 URL: https://issues.apache.org/jira/browse/HBASE-4709
>             Project: HBase
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 0.92.0, 0.94.0, 0.94.1
>            Reporter: Gary Helmling
>            Priority: Minor
>             Fix For: 0.96.0
>
>         Attachments: 4709_workaround.v1.patch
>
>
> Since switching over HBase to build with Hadoop 0.20.205.0, we've been getting a lot
of metrics related errors in the log files for tests:
> {noformat}
> 2011-10-30 22:00:22,858 INFO  [main] log.Slf4jLog(67): jetty-6.1.26
> 2011-10-30 22:00:22,871 INFO  [main] log.Slf4jLog(67): Extract jar:file:/home/jenkins/.m2/repository/org/apache/hadoop/hadoop-core/0.20.205.0/hadoop-core-0.20.205.0.jar!/webapps/datanode
to /tmp/Jetty_localhost_55751_datanode____.kw16hy/webapp
> 2011-10-30 22:00:23,048 INFO  [main] log.Slf4jLog(67): Started SelectChannelConnector@localhost:55751
> Starting DataNode 1 with dfs.data.dir: /home/jenkins/jenkins-slave/workspace/HBase-TRUNK/trunk/target/test-data/7ba65a16-03ad-4624-b769-57405945ef58/dfscluster_3775fc23-1b51-4966-8133-205564bae762/dfs/data/data3,/home/jenkins/jenkins-slave/workspace/HBase-TRUNK/trunk/target/test-data/7ba65a16-03ad-4624-b769-57405945ef58/dfscluster_3775fc23-1b51-4966-8133-205564bae762/dfs/data/data4
> 2011-10-30 22:00:23,237 WARN  [main] impl.MetricsSystemImpl(137): Metrics system not
started: Cannot locate configuration: tried hadoop-metrics2-datanode.properties, hadoop-metrics2.properties
> 2011-10-30 22:00:23,237 WARN  [main] util.MBeans(59): Hadoop:service=DataNode,name=MetricsSystem,sub=Control
> javax.management.InstanceAlreadyExistsException: MXBean already registered with name
Hadoop:service=NameNode,name=MetricsSystem,sub=Control
> 	at com.sun.jmx.mbeanserver.MXBeanLookup.addReference(MXBeanLookup.java:120)
> 	at com.sun.jmx.mbeanserver.MXBeanSupport.register(MXBeanSupport.java:143)
> 	at com.sun.jmx.mbeanserver.MBeanSupport.preRegister2(MBeanSupport.java:183)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:941)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:917)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:312)
> 	at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:482)
> 	at org.apache.hadoop.metrics2.util.MBeans.register(MBeans.java:56)
> 	at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.initSystemMBean(MetricsSystemImpl.java:500)
> 	at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.init(MetricsSystemImpl.java:140)
> 	at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.init(DefaultMetricsSystem.java:40)
> 	at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.initialize(DefaultMetricsSystem.java:50)
> 	at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1483)
> 	at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1459)
> 	at org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes(MiniDFSCluster.java:417)
> 	at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:280)
> 	at org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster(HBaseTestingUtility.java:349)
> 	at org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster(HBaseTestingUtility.java:518)
> 	at org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster(HBaseTestingUtility.java:474)
> 	at org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster(HBaseTestingUtility.java:461)
> {noformat}
> This seems to be due to errors initializing the new hadoop metrics2 code by default,
when running in a mini cluster.  The errors themselves seem to be harmless -- they're not
breaking any tests -- but we should figure out what configuration we need to eliminate them.

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