----- Original Message -----
From: "Clovis Wichoski" <[EMAIL PROTECTED]>
To: "Tomcat Users List" <users@tomcat.apache.org>
Sent: Friday, July 04, 2008 3:37 AM
Subject: Re: Tomcat 5.5.25 freezes
hi Christophe,
i'm fighting with this problem for months, but i will reply on your thread
for us to make a track of each problem, ok
On Thu, Jul 3, 2008 at 5:49 AM, Christophe Fondacci <
[EMAIL PROTECTED]> wrote:
Hello,
Might it be related to the problem I described in the thread "Tomcat
bottleneck on InternalInputBuffer.parseRequestLine" ?
Christophe.
----- Original Message ----- From: "Clovis Wichoski" <
[EMAIL PROTECTED]>
To: "Tomcat Users List" <users@tomcat.apache.org>
Sent: Thursday, July 03, 2008 3:26 AM
Subject: Re: Tomcat 5.5.25 freezes
Hi Anthony,
i have same problem sometimes in version 6.0.16, when the thread stuck
occurs again, execute the follow shell script, please adjust for your
scenario.
#!/bin/bash
today=`date +%Y%m%d%H%M%S`
psId=`/opt/java/jdk1.6.0_06/bin/jps | grep Bootstrap | cut -d' ' -f1`
/opt/java/jdk1.6.0_06/bin/jstack -l $psId >
/mnt/logs/stack/stack${today}.txt
execute some times, then post results here, for us to take a look,
regards
Clóvis
On Mon, Jun 30, 2008 at 5:00 AM, Anthony Chamas <[EMAIL PROTECTED]>
wrote:
Hello everyone,
I am having quite a weird situation on a production server : tomcat
seems to be stuck somewhere when handling http requests.
The activity being slow (10 users), some requests take exactly 30
minutes to be processed.
I have put aside the following :
-it happens on any page (not linked to a particular path)
-client issue : sniffing the network did not show anything special :
POST is ok, ACK is received by the client which waits for the server's
reply
-database lock : when that happens, I do not see any lock in the
database.
-filters : we tried to deactivate all of them : same result
-I see no errors, warning or something significant in the log files.
I am wondering why I am having the 30 minutes delay... maybe someone
has encountered the same situation... Thanks in advance for helping me
on this one !
Tony, I've never experienced this problem... but heres a guess, and
hopefully a guru can confirm the theory.
When you say 30 minutes, if I'm not mistaken, that is the default time it
takes for a cookie/session to time out... I think. So its somehow related to
that.
I think this is what happens... TC sends up the page and there is a keep
alive header in there... the browser then sends a request.... and keeps the
connection open.... TC sends a content size header of say 500 bytes, but
only reads 499... and then its buffer is empty... the browser waits and
waits for that last byte.... TC never sends it... eventually the cookie
times out, and this prompts TC to drop the connection on the waiting
browser... the browser now displays the data that it got... it looks fine
because the last char was probably a line feed. How can it happen? Thats the
million dollar question... but it maybe something like the content size is
set on the physical file size and a string is sent, that does have the cr.
If the theory is right then you can test it... send some data but set the
content lenght much higher... if it waits... we guessing good ;)
Another test... set the headers to http/1.0... the old standard drops
connections... if it never gets stuck... its related to the http/1.1 spec
which used content size.
It maybe because something else is locking up the file that TC is trying to
read...ie it just cant get the data to send it... or it maybe a bug... or
maybe I should stop guessing ;)
It maybe something tricky... like you updating a file from the EJB... a file
that TC depends on... its locked, or the record is locked... TC cant send...
the EJB is waiting on something that TC must tell it... stuck... and the
browser waits... I think its something like this...
Good Luck...
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