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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-7449) Refine UseMembar detail
Date Sun, 08 Jun 2014 21:39:01 GMT

     [ https://issues.apache.org/jira/browse/HBASE-7449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell resolved HBASE-7449.
-----------------------------------

    Resolution: Won't Fix
      Assignee:     (was: Liang Xie)

We don't recommend JDK 6 in production any longer.

> Refine UseMembar detail
> -----------------------
>
>                 Key: HBASE-7449
>                 URL: https://issues.apache.org/jira/browse/HBASE-7449
>             Project: HBase
>          Issue Type: Improvement
>          Components: documentation
>    Affects Versions: 0.95.2
>         Environment: $ uname -a
> Linux lg-hadoop-control01.bj 2.6.32-279.el6.x86_64 #1 SMP Fri Jun 22 12:19:21 UTC 2012
x86_64 x86_64 x86_64 GNU/Linux
> $ java -version
> java version "1.6.0_37"
> Java(TM) SE Runtime Environment (build 1.6.0_37-b06)
> Java HotSpot(TM) 64-Bit Server VM (build 20.12-b01, mixed mode)
>            Reporter: Liang Xie
>            Priority: Trivial
>         Attachments: HBASE-7449.txt
>
>
> we encountered a hung issue, the thread dump shows:
> most of threads waiting to a lock but there isn't lock holder be found
> We know there were some discuss before, e.g:
> https://issues.apache.org/jira/browse/HBASE-3622
> http://bugs.sun.com/view_bug.do?bug_id=6822370
> http://cs.oswego.edu/pipermail/concurrency-interest/2012-August/009635.html
> https://blogs.oracle.com/dave/entry/a_race_in_locksupport_park
> My point is that the JVM bug is still not fixed(at least for latest 1.6.0_37, the hotspot
version: 20.12-b01), it's not just a old JVM issue, let's update the trouble shooting document
firstly if possible. I'm trying to reproduce with a debug openjdk version in-house.



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