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https://issues.apache.org/jira/browse/HBASE-7950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13588002#comment-13588002
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Ted Yu commented on HBASE-7950:
-------------------------------
>From http://hbase.apache.org/book.html#basic.prerequisites, 2.1.1:
bq. Just like Hadoop, HBase requires at least java 6 from Oracle.
openjdk is not officially supported.
> 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
> Attachments: regionserver.log
>
>
> 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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