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Posted to issues@hbase.apache.org by "Elliott Clark (JIRA)" <ji...@apache.org> on 2012/08/17 01:21:38 UTC
[jira] [Updated] (HBASE-6602) Region Server Dynamic Metrics can
cause high cpu usage.
[ https://issues.apache.org/jira/browse/HBASE-6602?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Elliott Clark updated HBASE-6602:
---------------------------------
Summary: Region Server Dynamic Metrics can cause high cpu usage. (was: Redion Server Dynamic Metrics can cause high cpu usage.)
> Region Server Dynamic Metrics can cause high cpu usage.
> -------------------------------------------------------
>
> Key: HBASE-6602
> URL: https://issues.apache.org/jira/browse/HBASE-6602
> Project: HBase
> Issue Type: Bug
> Reporter: Elliott Clark
> Attachments: HBASE-6602-0.94-0.patch
>
>
> When regions are getting added and removed lots of cpu time can be used by jmx. This is caused by sending jmx messages for every new metric that is added or removed.
> Seeing jstacks like this:
> "RMI TCP Connection(3)-10.4.19.33" daemon prio=10 tid=0x00007f9d64b1d000 nid=0x353 runnable [0x00007f9d598d6000]
> java.lang.Thread.State: RUNNABLE
> at java.util.HashMap.put(HashMap.java:374)
> at org.apache.hadoop.metrics.util.MetricsDynamicMBeanBase.createMBeanInfo(MetricsDynamicMBeanBase.java:103)
> at org.apache.hadoop.metrics.util.MetricsDynamicMBeanBase.updateMbeanInfoIfMetricsListChanged(MetricsDynamicMBeanBase.java:75)
> at org.apache.hadoop.metrics.util.MetricsDynamicMBeanBase.getAttribute(MetricsDynamicMBeanBase.java:133)
> 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 java.util.TimerThread.run(Timer.java:462)
> "Timer thread for monitoring hbase" daemon prio=10 tid=0x00007f9d648fe000 nid=0x2b5 runnable [0x00007f9d624c7000]
> java.lang.Thread.State: RUNNABLE
> at java.util.HashMap.put(HashMap.java:374)
> at org.apache.hadoop.metrics.util.MetricsDynamicMBeanBase.createMBeanInfo(MetricsDynamicMBeanBase.java:103)
> at org.apache.hadoop.metrics.util.MetricsDynamicMBeanBase.updateMbeanInfoIfMetricsListChanged(MetricsDynamicMBeanBase.java:75)
> at sun.reflect.GeneratedMethodAccessor29.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.hbase.regionserver.metrics.RegionServerDynamicMetrics.setNumericMetric(RegionServerDynamicMetrics.java:105)
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