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From Bradley Wagner <bradley.wag...@hannonhill.com>
Subject Re: 100% usage and hanging on startup of Spring/Hibernate app in Tomcat 5.5 on Ubuntu 7
Date Thu, 03 Sep 2009 19:54:25 GMT
Hmm, I'm going to try again with more explicit PermGen space as it seems to
be out of it.
- Bradley

On Thu, Sep 3, 2009 at 3:51 PM, Bradley Wagner <
bradley.wagner@hannonhill.com> wrote:

> And again in a new place on subsequent attempt. I've attached the logging
> this time because the amount of logging between the last Tomcat line and the
> GC line was significant!
> - Bradley
>
>
> On Thu, Sep 3, 2009 at 1:49 PM, Caldarale, Charles R <
> Chuck.Caldarale@unisys.com> wrote:
>
>> > From: Bradley Wagner [mailto:bradley.wagner@hannonhill.com]
>> > Subject: Re: 100% usage and hanging on startup of Spring/Hibernate app
>> > in Tomcat 5.5 on Ubuntu 7
>> >
>> > Maybe it can't connect when it's hung.
>>
>> Quite possible; GC stops all threads, so the JMX agent may well be
>> suspended.
>>
>> You might want to try turning on pretty much all of the GC-related trace
>> flags:
>>
>> -XX:+PrintGC
>> -XX:+PrintGCDetails
>> -XX:+PrintGCTimeStamps
>> -XX:+PrintGCTaskTimeStamps
>> -XX:+PrintReferenceGC
>> -XX:+TraceGen0Time
>> -XX:+TraceGen1Time
>> -XX:+PrintTenuringDistribution
>> -XX:+PrintHeapAtGC
>> -XX:+TraceParallelOldGCTasks
>> -XX:+PrintParallelOldGCPhaseTimes
>>
>> (All on one line, of course.)  This will produce a *lot* of output.
>>
>>  - Chuck
>>
>>
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