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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 19:51:32 GMT
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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