Thanks for the responses thus far. I've been trying to get more information
about the problem, but haven't been very successfull. I can't seem to create
thread dumps, because I have to use Terminal Services. Is there a way to get
a thread dump even though I'm using Terminal Services?
Tomcat keeps locking up every afternoon, during the work week, so its
definitely related to server traffic. Sometimes it locks up twice in an
afternoon.
I found this article about IIS 6.0 application health monitoring and I was
wondering if anyone know if the items listed in the section 'ISAPI
Extensions Can Declare Themselves Unhealthy' are implemented in the ISAPI
redirector?
http://help.alentus.com/article.aspx?id=10958&cNode=7F8F8Y
Here's what the ISAPI redirector logs say (the following errors are simply
repeated until Tomcat is restarted). My log level is currently set to
'WARN':
Mon Dec 17 13:48:34.484 2007] [4340:5744] [error] jk_ajp_common.c (966):
(ajp13w) can't receive the response message from tomcat, network problems or
tomcat (127.0.0.1:8009) is down (errno=60)
[Mon Dec 17 13:48:34.484 2007] [4340:5744] [error] jk_ajp_common.c (1658):
(ajp13w) Tomcat is down or refused connection. No response has been sent to
the client (yet)
[Mon Dec 17 13:48:38.390 2007] [4340:3340] [error] jk_ajp_common.c (966):
(ajp13w) can't receive the response message from tomcat, network problems or
tomcat (127.0.0.1:8009) is down (errno=60)
[Mon Dec 17 13:48:38.390 2007] [4340:3340] [error] jk_ajp_common.c (1658):
(ajp13w) Tomcat is down or refused connection. No response has been sent to
the client (yet)
[Mon Dec 17 13:48:47.015 2007] [4340:5744] [error] jk_ajp_common.c (966):
(ajp13w) can't receive the response message from tomcat, network problems or
tomcat (127.0.0.1:8009) is down (errno=60)
[Mon Dec 17 13:48:47.015 2007] [4340:5744] [error] jk_ajp_common.c (1658):
(ajp13w) Tomcat is down or refused connection. No response has been sent to
the client (yet)
[Mon Dec 17 13:48:49.015 2007] [4340:5744] [error] jk_ajp_common.c (2097):
(ajp13w) Connecting to tomcat failed. Tomcat is probably not started or is
listening on the wrong port
----- Original Message -----
From: "Rainer Jung" <[EMAIL PROTECTED]>
To: "Tomcat Users List" <users@tomcat.apache.org>
Sent: Friday, December 14, 2007 9:20 AM
Subject: Re: Tomcat and IIS losing their link
> Travis Haagen wrote:
> > Hello,
> >
> > I've got IIS 6.0 linked with Tomcat 5.5.25 (with JDK 1.5.0_14-b03 and
> > AJP dll) via the ISAPI connector (JK 1.2.25) on Windows 2003 Server,
> > and during high traffic periods, the connection between IIS and
> > Tomcat is being severed. This has been occurring in the mid-afternoon
> > every day since this server went live and to get it running again,
> > I've had to restart Tomcat. The peak connections to IIS during one of
> > the days was just under 100, so this isn't really all that high of
> > traffic.
> >
> > The isapi_redirect.log isn't much help. It has only been logging
> > errors after the connection to Tomcat has been broken. Tomcat itself
> > hasn't logged anything of relevance and I don't actually think that
> > Tomcat is affected when the link is broken, but as I mentioned
> > earlier, I have to restart Tomcat to get it to reconnect with IIS.
>
> Nevertheless at least i would be curious to know, what the exact
> contents of the isapi redirector log files are. We don't need all of it,
> but the first 100 lines or so could be interesting. What's you log level?
>
> Have a look at the other thread running on this list the last few days
> ("ISAPI JK2 ran better than JK, how can that be?"). To get a slightly
> better idea what's happening when, you could also introduce a load
> balancer and a status worker.
>
> Most likely it would help to take Java Thread Dumps and look inside the
> JVM, what your request threads are doing, when IIS gets stuck.
>
> Regards,
>
> Rainer
>
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