Mailing-List: contact tomcat-dev-help@jakarta.apache.org; run by ezmlm
Date: Sat, 3 Jun 2000 10:08:15 -0700
From: Alex Chaffee <guru@edamame.stinky.com>
To: tomcat-user@jakarta.apache.org, tomcat-dev@jakarta.apache.org
Subject: Re: Bug in InvokerServlet: NullPointerException, tomcat totally dies
Message-ID: <20000603100815.H3663@edamame.stinky.com>
Reply-To: alex@jguru.com
References: <20000603041928.A27775@edamame.stinky.com>
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In-Reply-To: <20000603041928.A27775@edamame.stinky.com>;
 from guru@edamame.stinky.com on Sat, Jun 03, 2000 at 04:19:28AM -0700

Curiouser and curiouser... 

Seems the null pointer in my servlet's doGet method is trying to
dereference an instance variable... that is set in the init method!

Might Tomcat be getting confused by multiple simultaneous requests,
accidentally instantiating a new instance, and calling doGet on this
new instance without calling init?

More detective work is required...

 - Alex

---
Alex Chaffee                       mailto:alex@jguru.com
jGuru - Java News and FAQs         http://www.jguru.com/alex/
Founder of Purple Technology       http://www.purpletech.com/
Creator of Gamelan                 http://www.gamelan.com/
Curator of Stinky Art Collective   http://www.stinky.com/


On Sat, Jun 03, 2000 at 04:19:28AM -0700, Alex Chaffee wrote:
> (sending to both lists since I'm not sure where to report bugs these
> days)
> 
> I'm running Tomcat standalone, testing a simple servlet on a (live)
> medium-load site.  It's tied to an applet that polls once every N
> seconds; as a result, I'm getting upwards of 8 requests per second,
> but it seems to be about 2-3 hits per second on average.
> 
> It runs fine for hours, then dies silently in the middle of the
> night. The VM is still running, but doesn't accept any connections.
> As far as I can tell, the problem is a NullPointerException in
> InvokerServlet.  I'll try to track it down more carefully by turning
> off the JIT.
>