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From "Yousuf Ahmad (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-7950) Repeated requests to regionserver JMX metrics crashes regionserver
Date Wed, 27 Feb 2013 04:52:12 GMT
Yousuf Ahmad created HBASE-7950:
-----------------------------------

             Summary: Repeated requests to regionserver JMX metrics crashes regionserver
                 Key: HBASE-7950
                 URL: https://issues.apache.org/jira/browse/HBASE-7950
             Project: HBase
          Issue Type: Bug
    Affects Versions: 0.95.0
         Environment: Linux 2.6.38-16-generic-pae #67-Ubuntu SMP i686 i686 i386 GNU/Linux
java-6-openjdk
            Reporter: Yousuf Ahmad
            Priority: Minor


Making repeated requests (e.g., every 10 seconds) to the regionserver JMX metrics servlet
crashes the regionserver. It will serve several requests correctly but then throw an exception
upon the next request and then crash.

I can reproduce the error using a bash loop that will wget the /jmx servlet every 2 seconds.
My regionserver ultimately crashes within a few minutes.

The regionserver log shows these exceptions (grep "Caused by"):

{noformat}
Caused by: java.lang.InternalError: Unsupported VMGlobal Type 177
Caused by: java.lang.InternalError: Unsupported VMGlobal Type 0
Caused by: java.lang.NullPointerException
Caused by: java.lang.NullPointerException
Caused by: java.lang.NullPointerException
Caused by: java.lang.NullPointerException
Caused by: java.lang.NullPointerException
Caused by: java.lang.InternalError: Unsupported VMGlobal Type 0
Caused by: java.lang.InternalError: Unsupported VMGlobal Type 8192
Caused by: java.lang.InternalError: Unsupported VMGlobal Type 0
Caused by: java.lang.InternalError: Unsupported VMGlobal Type 0
Caused by: java.lang.InternalError: Unsupported VMGlobal Type 0
Caused by: java.lang.InternalError: Unsupported VMGlobal Type 0
Caused by: java.lang.InternalError: Unsupported VMGlobal Type 159785336
Caused by: java.lang.InternalError: Unsupported VMGlobal Type 159869880
Caused by: java.lang.InternalError: Unsupported VMGlobal Type 0
Caused by: java.lang.InternalError: Unsupported VMGlobal Type 0
Caused by: java.lang.NullPointerException
{noformat}


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