[jira] [Created] (HBASE-24402) Moving the meta region causes MetricsException when using above 2.6.0 hadoop version

["Jeongdae Kim (Jira)" <ji...@apache.org>]

Jeongdae Kim created HBASE-24402:
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             Summary: Moving the meta region causes MetricsException when using above 2.6.0 hadoop version
                 Key: HBASE-24402
                 URL: https://issues.apache.org/jira/browse/HBASE-24402
             Project: HBase
          Issue Type: Bug
    Affects Versions: 1.4.13
            Reporter: Jeongdae Kim
            Assignee: Jeongdae Kim


When the meta region moved out from a region server then moved in to the one again. we got MetricsException below and the metric source for coprocessor could be re-registered.
{noformat}
2020-04-21 15:13:02,956 WARN  [HBase-Metrics2-1] util.MBeans: Error creating MBean object name: Hadoop:service=HBase,name=RegionServer,sub=Coprocessor.Region.C
P_org.apache.hadoop.hbase.coprocessor.MultiRowMutationEndpoint
org.apache.hadoop.metrics2.MetricsException: org.apache.hadoop.metrics2.MetricsException: Hadoop:service=HBase,name=RegionServer,sub=Coprocessor.Region.CP_org.
apache.hadoop.hbase.coprocessor.MultiRowMutationEndpoint already exists!
    at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.newObjectName(DefaultMetricsSystem.java:127)
    at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.newMBeanName(DefaultMetricsSystem.java:102)
    at org.apache.hadoop.metrics2.util.MBeans.getMBeanName(MBeans.java:121)
    at org.apache.hadoop.metrics2.util.MBeans.register(MBeans.java:64)
    at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.startMBeans(MetricsSourceAdapter.java:222)
    at org.apache.hadoop.metrics2.impl.MetricsSourceAdapter.start(MetricsSourceAdapter.java:100)
    at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.registerSource(MetricsSystemImpl.java:268)
    at org.apache.hadoop.metrics2.impl.MetricsSystemImpl$1.postStart(MetricsSystemImpl.java:239)
    at jdk.internal.reflect.GeneratedMethodAccessor82.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.apache.hadoop.metrics2.impl.MetricsSystemImpl$3.invoke(MetricsSystemImpl.java:320)
    at com.sun.proxy.$Proxy10.postStart(Unknown Source)
    at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.start(MetricsSystemImpl.java:193)
    at org.apache.hadoop.metrics2.impl.JmxCacheBuster$JmxCacheBusterRunnable.run(JmxCacheBuster.java:109)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:834) 
{noformat}



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