Jesse Klaasse schrieb:
I will try to remove/increase socket_timeout to see what happens..

Unfortunately, Tomcat hung again today. It managed to work again without
manually restarting, but again, the 503 message for a while..

I attached two thread dumps and an excerpt of today's isapi_redirect.log. BTW, this is APR 1.1.14 and JK 1.2.26.

To simplify the setup I would suggest to disable the APR connector. In the problematic thread dump we can see, that there is no Poller actually in poll, whereas in the good case we have 5 Poller threads in poll.

Regards, Jesse.


Rainer Jung-3 wrote:
To really study communication behaviour I would suggest installing a raw http client like curl and then do

curl -v -D - http://myserver:myport/myuri

Even with curl, the results were exactly as I described before.
curl will not cache, follow redirects or any other of those nice user GUI features, that make understanding communication behaviour difficult.

http://www.nabble.com/file/p18588484/20080722_isapi_redirect.log.gz
20080722_isapi_redirect.log.gz http://www.nabble.com/file/p18588484/20080722_threaddump1_locked.txt.gz 20080722_threaddump1_locked.txt.gz http://www.nabble.com/file/p18588484/20080722_threaddump2.txt.gz 20080722_threaddump2.txt.gz

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