hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Nate Putnam (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-9128) MetricsDynamicMBeanBase can cause high cpu load
Date Tue, 11 Dec 2012 00:51:22 GMT
Nate Putnam created HADOOP-9128:

             Summary: MetricsDynamicMBeanBase can cause high cpu load
                 Key: HADOOP-9128
                 URL: https://issues.apache.org/jira/browse/HADOOP-9128
             Project: Hadoop Common
          Issue Type: Bug
          Components: metrics
    Affects Versions: 0.20.2
         Environment: cdh3u4
            Reporter: Nate Putnam

I noticed high load on some of our Hadoop services. On closer inspection we found several
threads that were consuming cpu (80-90% of a core) doing : 

java.lang.Thread.State: RUNNABLE
at java.util.HashMap.get(HashMap.java:303)
at org.apache.hadoop.metrics.util.MetricsDynamicMBeanBase.getAttribute(MetricsDynamicMBeanBase.java:135)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:666)

This is a known issue in java when using a non thread safe hash map from multiple threads.

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

View raw message