Yousuf Ahmad created HBASE-7950:
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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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