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From: Ernst de Haan <znerd@freebsd.org>
To: Alexey Zelkin <phantom@FreeBSD.org.ua>
Date: Fri, 11 Apr 2003 13:05:28 +0100
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cc: java@freebsd.org
cc: Greg Lewis <glewis@freebsd.org>
cc: Alexey Zelkin <phantom@FreeBSD.org.ua>
cc: Bill Proud <bill.proud@nl.wanadoo.com>
cc: Chris Gilbride <chris.gilbride@nl.wanadoo.com>
Subject: Re: SIGBUS on FreeBSD 4.7-S / Native JDK 1.3
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> Well.  I am not jdk1.3 expert, but quick look on dump shows that you're
> using 'green threads'.  So, problem can be related to JIT which you're
> using or maybe application itself.

No JIT is used. And the application self (Tomcat) cannot be the problem, can 
it? It's running within the JVM...

> Actually, from my expirience of porting jdk14 -- SIGBUS is usually notice
> of StackOverflow, but I don't know details of stack implementation in
> 'green threads'.

You mean a stack overflow in the C code?


Ernst

> On Fri, Apr 11, 2003 at 11:49:56AM +0100, Ernst de Haan wrote:
> > Alexey, Greg,
> >
> > We're in the middle of deploying quite a large frontend application on
> > Tomcat 4. We'd prefer to deploy on J2SE 1.3/FreeBSD, but we're getting
> > SIGBUS errors. Currently we're using these versions:
> >
> > * Tomcat 4.1.24
> > * JDK 1.3.1p7
> > * FreeBSD 4.7-STABLE (Compiled @ 2002.11.18/14:56:20 CET)
> > * x86 SMP system (Dual P4, I think)
> >
> > I see a number of alternative solutions:
> >
> > * Upgrade to FreeBSD 4.8 (I remember there were some Java-related
> >   improvements after Nov 2002, right?)
>
> No reason to do it, unless you propose to use 'native threads' or jdk14.
>
> > * Upgrade to JDK 1.3.1p8
>
> That's first point which you need to try.
>
> > * Set MAXUSERS to 0 in the kernel config file and recompile and install
> > the kernel (I remember this solved some native JDK problem in the past)
>
> You're not using native threads, so native threads methods are
> unapplicable.
>
> > * Use a different J2SE VM (I don't really want to do this)
>
> Why not ?
>
> > * Examine the core file to see what exactly went wrong
> >
> > Any suggested approach?
>
> Try updating to -p8 and see if anything changes.