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From Bob Hall <rfha...@yahoo.com>
Subject Re: log4j in webapp hanging Tomcat?
Date Sun, 02 Jul 2006 04:56:56 GMT
--- Bob Hall <rfhall3@yahoo.com> wrote:

> --- Avi Deitcher <avi@deitcher.net> wrote:
> 
> > The simple classes (a JSF backing bean and a
> filter)
> > are set to use
> > either commons-logging or log4j directly (I tried
> > both). In either case,
> > the moment that I uncomment any category line and
> > one of my classes (the
> > filter or the bean) calls log.debug("some
> message"),
> > Tomcat freezes
> > entirely. This is true whether I use log4j
> directly
> > or commons-logging
> > in my classes, and whether or not I comment or
> > uncomment the first
> > log4j.rootCategory line in log4j.properties. I get
> > some output from the
> > appender matching the pattern, and then freeze. I
> > cannot access any
> > context; I cannot use the manager; the only thing
> I
> > can do is kill the
> > Tomcat process.
> > 
> > I am at wit's end with this; it took literally
> days
> > to narrow down that
> > it was log4j's activation doing it.
> > 
> 
> Avi,
> 
> You didn't mention which OS you are using.  If
> it's *nix you may be able use 'truss' to get info
> on exactly what Tomcat is doing when it "freezes".
> BTW, a google search produced several hits for
> linux impl's of solaris' truss command.  My
> guess is that you'll find that Tomcat is stuck
> in a "loop".
> 
> HTH,
> Bob
> 

Looks link linux's equivalent of 'truss' is 'strace'.

-Bob

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