Hung JVM consuming 100% CPU

[Bogdan Dimitriu]

Hi Justin,
I'm quite sure it's not the good old FP bug, because it's the VM Thread 
that seems to be hung (have a look at the native thread dump mentioned 
on the forum thread, we found out that was the spinning thread using 
'top') and not one of the applications threads.

Bogdan

On 01/03/11 17:40, Justin Ellison wrote:
> Bogdan,
>
> Make sure you're not actually seeing this bug:
> http://www.exploringbinary.com/fpupdater-fixes-the-java-2-2250738585072012e-308-bug/
>
> It sounds strikingly similar.
>
> Justin
>
> On Tue, Mar 1, 2011 at 3:38 AM, Bogdan Dimitriu<bdimitri at cisco.com>  wrote:
>> Hi guys,
>>
>> We're having a problem with garbage collection as described here:
>> http://forums.oracle.com/forums/message.jspa?messageID=9345173 (I
>> apologise if posting links is not the right policy, but I prefer not to
>> duplicate data).
>>
>> We are going to try an upgrade to JRE 6u24 soon, but reading the release
>> notes for each of the versions since 6u20, I don't have much hope of
>> this upgrade fixing the problem.
>>
>> I have searched a bit on the Java bugs database and I've come across
>> something that looks similar to the problem I am experiencing:
>> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6692906, but I'm not
>> convinced this is exactly the same issue. This bug it seems will be
>> fixed in 6u25 (which I've read will be released late March or early April).
>>
>> The reason I'm leaning towards thinking this is a JVM bug is the fact
>> that the JVM can stay in the hung state (as described on the forum) for
>> 2+ hours until we kill the process.
>>
>> I was hoping to get an idea about this from the source :), so any hints
>> will be greatly appreciated.
>>
>> Thanks,
>> Bogdan
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