be
a good place to start looking. Please let me know if you find anything.
Larry
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Sunday, March 20, 2005 11:55 PM
To: Tomcat Users List
Subject: Re: Tomcat hangs up from time to time
Well, I have tried to kill
Well, I have tried to kill tomcat process with SIGQUIT in order to take thread
dump.
No any reaction. Only SIGKILL works.
On Thu, 17 Mar 2005 11:28:58 -
Peter Crowther [EMAIL PROTECTED] wrote:
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
But about two-five times per day, Tomcat
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
But about two-five times per day, Tomcat hangs up,
java (version is 1.5.0_01-b08) eats much cpu (up to 90%),
and no any response from Tomcat, no warnings/errors in logs.
I even can't stop it with shutdown.sh!
Have anyone the same problem?
Have you analyze the memory usage on the box?
On Fri, 04 Feb 2005 14:35:37 +0530, Dhana Sekar Sugunan
[EMAIL PROTECTED] wrote:
Hi,
I am not sure i am posting this in the correct area. Please bear and advice.
My application needs to run a thread contiuously for every 1 hr. I have made
Hi,
i have a huge count of webapps (approximately 25) in my Tomcat here,
I wouldn't classify 25 as huge, but I suppose that's subjective. We
have servers running that many webapps, but they're small webapps.
Well, beneath the fact that my server has 2 gigabytes of ram, only 40MB
are available
Hi,
### Ok. It's not THAT huge .. but we have ~45 users per webapp which
are
going to connect on nearly the same time ..
25 apps * 45 users = virtually 1125 concurrent users, that's
significant.
I'm bringing up the JVM with /usr/j2re142_05/bin/java -server
-Xmx1024m -Xms256m -D ...
Then
Hi,
sorry for the late reply, I've been allocated to other projects in the
meantime.
Nope it doesn't have the header included, but it was worth a shot.
Does anybody know where can I find information on how tomcat will respond
when the load gets to high? Will it start throwing exceptions, or is
connector.
Yoav Shapira
Millennium Research Informatics
-Original Message-
From: Hans Wichman [mailto:[EMAIL PROTECTED]
Sent: Wednesday, July 21, 2004 2:56 AM
To: Tomcat Users List
Subject: Re: tomcat hangs, top displays 99%
Hi,
sorry for the late reply, I've been allocated to other
i don't tried this, because the app runs with ssl - therefore i'm using
apache with mod_ssl in front of tomcat
greetings
stefan
Shapira, Yoav wrote:
Hi,
Does it happen if you run tomcat stand-alone, i.e. without the connector
and Apache in front?
Yoav Shapira
Millennium Research Informatics
Hi,
Does it happen if you run tomcat stand-alone, i.e. without the connector
and Apache in front?
Yoav Shapira
Millennium Research Informatics
-Original Message-
From: news [mailto:[EMAIL PROTECTED] On Behalf Of Stefan Burkard
Sent: Wednesday, July 14, 2004 3:25 AM
To: [EMAIL
Just a thought. Does your error page also have header.jsp included?
Have you got yourself into an infinite loop of Session already
invalidated IllegalStateExceptions?
Jon
Hans Wichman wrote:
Hi,
while stresstesting my application using tomcat 4.1.29, oracle, dbcp
connection pooling and a
Hi Matt,
See this message for the probable solution:
http://marc.theaimsgroup.com/?l=tomcat-userm=108670043100516w=2
Also see the following messages for further explanations:
http://marc.theaimsgroup.com/?l=tomcat-userw=2r=1s=tomcat+jitters%2C+then
+hangs+-+please+helpq=b
HTH,
Ryan.
Well, here's an update on our tomcat 'lockups'.
When tomcat 'locks up', it won't answer any requests to any webapp,
including the manager webapp, even on port 8080. Apache still runs fine
on requests for things that are not directed to tomcat.
We are having mixed results right now fixing this.
Subject: RE: Tomcat Hangs
I could not find that file. But meanwhile it stopped responding again.
This time it is not a crash, I can still see the console and the
java.exe process in the Task Manager.
When I hit ctrl + break on the console, there was a lot of log message
that scrolled
: Thursday, March 25, 2004 7:59 pm
Subject: Re: Tomcat Hangs
What kind of activity is going on with this server during those two
hours? Heavy, moderate, light load? Is it a development box or
production?
I ask the last question, since some have seen a problelm with
repeated
redeploys of a web
What OS is Tomcat running on ?
-Original Message-
From: Surya Suravarapu [mailto:[EMAIL PROTECTED]
Sent: 26 March 2004 00:51
To: [EMAIL PROTECTED]
Subject: Tomcat Hangs
We have Tomcat 4.1.27 running in conjunction with Apache 1.3.x. We're
using AJP13 connector. The machine that we're
Tomcat is running on Windows 2000 machine.
- SPS
- Original Message -
From: Ryan Lissack [EMAIL PROTECTED]
Date: Friday, March 26, 2004 3:49 am
Subject: RE: Tomcat Hangs
What OS is Tomcat running on ?
-Original Message-
From: Surya Suravarapu [mailto:[EMAIL PROTECTED]
Sent
Can you please elaborate what you meant by kill -QUIT. Tomcat is
running on a windows 2000 machine.
- SPS
- Original Message -
From: Antonio Fiol Bonnín [EMAIL PROTECTED]
Date: Friday, March 26, 2004 1:55 am
Subject: Re: Tomcat Hangs
kill -QUIT
to see what the threads are doing
You can achieve the same thing on Windows by typing 'Ctrl-Break' at the
console window
-Original Message-
From: Surya Suravarapu [mailto:[EMAIL PROTECTED]
Sent: 26 March 2004 12:15
To: Tomcat Users List
Subject: Re: Tomcat Hangs
Can you please elaborate what you meant by kill -QUIT
Consultancy Services
Mailto: [EMAIL PROTECTED]
Website: http://www.tcs.com
Surya Suravarapu
[EMAIL PROTECTED]
03/26/2004 07:15 AM
Please respond to
Tomcat Users List [EMAIL PROTECTED]
To
Tomcat Users List
[EMAIL PROTECTED]
cc
Subject
Re: Tomcat Hangs
Can you please elaborate
respond to
Tomcat Users List [EMAIL PROTECTED]
To
Tomcat Users List
[EMAIL PROTECTED]
cc
Subject
Re: Tomcat Hangs
when u r saying that tomcat is not consuming even half of the total memory,
there should be something else that is creating the problem..may
be iam wrong but this is
what
Subject
Re: Tomcat Hangs
when u r saying that tomcat is not consuming even half of the total=20
memory,=20
there should be something else that is creating the problem..may be iam=20
wrong but this is=20
what i feel..pls stop all other services on ur windows machine and see if=20
tomcat=20
Just now Tomcat stopped responding. While stopping the console I've got
the following message:
---
#
# HotSpot Virtual Machine Error, Internal Error
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi
#
# Error ID: 43492F424A454354264143544F52590E435050010E
#
#
Users List
Subject: Re: Tomcat Hangs
Just now Tomcat stopped responding. While stopping the console I've got
the following message:
---
#
# HotSpot Virtual Machine Error, Internal Error
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi
#
# Error ID
, 2004 9:15 AM
To: Tomcat Users List
Subject: Re: Tomcat Hangs
Just now Tomcat stopped responding. While stopping the console
I've got
the following message:
---
#
# HotSpot Virtual Machine Error, Internal Error
# Please report this error at
# http://java.sun.com/cgi-bin
Hi,
Yes this time it appears to be a crash. The message that I posted below
is the only message that I can see on the console. This is the last
message before crashing.
There should be a file called hs_err_ ( can be a number of
different things on the Windows platform) in the current
, 2004 9:37 am
Subject: RE: RE: Tomcat Hangs
Hi,
Yes this time it appears to be a crash. The message that I posted
belowis the only message that I can see on the console. This is
the last
message before crashing.
There should be a file called hs_err_ ( can be a number
Hi,
I could not find that file. But meanwhile it stopped responding again.
This time it is not a crash, I can still see the console and the
java.exe process in the Task Manager.
OK. Make note of the fact these are different problems with different
results: one is a hang, one is a crash.
When
It appears that upgrade to JDK 1.4.2 is helping. Tomcat did not
crash/hang today.
- SPS
- Original Message -
From: Shapira, Yoav [EMAIL PROTECTED]
Date: Friday, March 26, 2004 9:17 am
Subject: RE: Tomcat Hangs
Hi,
You said it's hung, not crashed, but this is an internal crash
What kind of activity is going on with this server during those two
hours? Heavy, moderate, light load? Is it a development box or
production?
I ask the last question, since some have seen a problelm with repeated
redeploys of a web application, where the JVM's permanent generation
memory is
-
From: Jeff Tulley [EMAIL PROTECTED]
Date: Thursday, March 25, 2004 7:59 pm
Subject: Re: Tomcat Hangs
What kind of activity is going on with this server during those two
hours? Heavy, moderate, light load? Is it a development box or
production?
I ask the last question, since some have
kill -QUIT
to see what the threads are doing...
Surya Suravarapu wrote:
We have Tomcat 4.1.27 running in conjunction with Apache 1.3.x. We're
using AJP13 connector. The machine that we're using has got over 2GB of
Memory and good processor speed. Tomcat has been allocated 1 GB of max
memory.
Howdy,
No. I've not been able to isolate the bug well enough to reproduce it,
so
there's nothing to test with. I have only observed the vulnerability in
our
current production server. I've since disabled access for the IP range
that was generating the problematic http requests.
Fair enough ;)
Hello,
I posted a query last week about Tomcat 4.0.6 under OS X hanging, but
haven't seen any response (was: SocketInputStream hanging Tomcat 4.0.6).
Is there anything more I can do ( more information I can provide, for
example ) to illicit feedback from the list or the developer of the code
Howdy,
Have you tried this with a more recent tomcat version?
Yoav Shapira
Millennium ChemInformatics
-Original Message-
From: Chris Rolfe [mailto:[EMAIL PROTECTED]
Sent: Thursday, February 12, 2004 2:01 PM
To: Tomcat
Subject: Re: Tomcat hangs
Hello,
I posted a query last week about
on 2/12/04 11:17 AM, Shapira, Yoav wrote:
Have you tried this with a more recent tomcat version?
No. I've not been able to isolate the bug well enough to reproduce it, so
there's nothing to test with. I have only observed the vulnerability in our
current production server. I've since disabled
Hi,
Which version of RedHat are you running?
Ryan
-Original Message-
From: Mindaugas Genutis [mailto:[EMAIL PROTECTED]
Sent: 07 January 2004 08:49
To: [EMAIL PROTECTED]
Subject: Tomcat hangs
Hello,
Our Tomcat hangs once in a few days. When the load is larger, sometimes it
hangs
Howdy,
Look at your logs for errors, including OutOfMemoryErrors. Determine
what is the maximum expected load your application needs to handle, and
then determine the memory your application requires in order to handle
that load with acceptable response times. Create test scripts to stress
test
If you are running Redhat version 9.0, then it might be a problem with
NPTL( stands for Native POSIX Threading Library and it is a new form of
threading introduced in RedHat with version 9.0
in RedHat 9).
Try setting the following environment variable:
LD_ASSUME_KERNEL=2.4.1
There is a
Shapira, Yoav schrieb:
Howdy,
catalina.out grows up by adding [INFO] ChannelSocket - -server has been
restarted or reset this connection
Maybe someone at least ;-) can explain under which circumstances such an
error message is produced?
Look at the source code to see where the message
Howdy,
Look at the source code to see where the message comes from. As the
[INFO] indicates, it's not an error, just an informational message. You
can configure commons-logging for tomcat so that these messages do not
appear in your log.
Yoav Shapira
Hi Yoav,
thanks for your help!
Howdy,
Shapira, Yoav schrieb:
Cool verb ;)
maybe following hint could be important for you: Nearly ALL persons
that
make use of FreeBSD do NOT use the - in your words - normal
configuration
or normal jvms because you get trouble with it under FreeBSD.
And whose problem is that? ;) Certainly
Shapira, Yoav schrieb:
Howdy,
Threads like these are exasperating ;)
It almost definitely is a JVM/threading problem. You've already gone
into a far less common configuration than most on this list by using
Blackdown and green mode. If you do this, you risk not being able to
get much
David Rees schrieb:
On Tue, October 7, 2003 1at 1:59 am, Volker sent the following
Following problem can be recognized even if the tomcat process is not in
sbwait mode:
1) Sending a -QUIT signal to the tomcat process does not stop the process.
A -QUIT will not shut down Tomcat, but
On Wed, October 8, 2003 1at 2:07 am, Volker sent the following
David Rees schrieb:
On Tue, October 7, 2003 1at 1:59 am, Volker sent the following
Following problem can be recognized even if the tomcat process is
not in sbwait mode:
1) Sending a -QUIT signal to the tomcat process does not
Rees has
been trying to give you...
Yoav Shapira
Millennium ChemInformatics
-Original Message-
From: David Rees [mailto:[EMAIL PROTECTED]
Sent: Wednesday, October 08, 2003 3:51 AM
To: Tomcat Users List
Subject: Re: Tomcat hangs after a few days!
On Wed, October 8, 2003 1at 2:07 am, Volker
David Rees schrieb:
Can you send the Tomcat process a -QUIT signal so we can see what the
state of the JVM is?
It sounds like a JVM bug, and Java on FreeBSD is less than heavily used...
Try a different JVM if you can.
Hi David,
I use the most stable jvm I know for FreeBSD: Blackdown Java
On Tue, October 7, 2003 1at 1:59 am, Volker sent the following
Following problem can be recognized even if the tomcat process is not in
sbwait mode:
1) Sending a -QUIT signal to the tomcat process does not stop the process.
A -QUIT will not shut down Tomcat, but cause the JVM to dump a stack
Can you send the Tomcat process a -QUIT signal so we can see what the
state of the JVM is?
It sounds like a JVM bug, and Java on FreeBSD is less than heavily used...
Try a different JVM if you can.
-Dave
On Mon, October 6, 2003 at 6:37 am, Volker sent the following
Hi,
I already posted
We are running on the following platform:
Windows NT 4.0 SP6a
Tomcat 3.3.1a (The problem originally occurred on 3.2.4, we upgraded to
3.3.1a hoping to solve the problem)
Sun Java SDK 1.3.1_08
Hi,
I have heard of Tomcat hanging in some situations up to 4.1.24. However
looking at the above
what platform?
because we have the same problem under hp-ux with java1.4
then we switch to java1.3, and the problem is gone...
xyb
Bjrn Clemens wrote:
Hi,
we have a production-system which uses Tomcat 4.1.18 LE which hangs after around a
day. The problem is, that no error-message or behavior
Hi,
Can you please let me know,
whether it hangs so that the server need to be killed, or server crashes and
closes it self???
Regards,
Pratt.
- Original Message -
From: Björn Clemens [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, March 17, 2003 1:24 PM
Subject: Tomcat hangs
Hi,
It's very likely your app has an infinite loop or a thread lock
somewhere. Check that very carefully.
Tomcat, from time to time, starts processing and locks into some loop
or
Can you reproduce this reliably?
This happens for a while and then when the session is terminated, I
believe, then
Thanks Yoav,
I don't think it's a problem with the code in my application because the pages work
fine and the code in the pages gets executed without problems before hand. From time
to time, when I press on a link to access a page the browser starts
thinking...thinking...it never really
: Tomcat hangs with Apache2
Yes, getting them installed and working together was actually fairly
easy. I can't get the mod_jk connectors to work yet, but the mod_webapp
works except for the problem I described, which happens on every
request, so it is useless.
I have it working on RedHat 7.0
Chris,
I'm a newbie, so excuse lack of knowledge, however, you actually got
these 2 to install and work together can you share your experience? Are you
using mod_jk or the AJP connectors? What's the specs of the system?
Thanks. Trask
Unix has its weak points but its file system is
Yes, getting them installed and working together was actually fairly
easy. I can't get the mod_jk connectors to work yet, but the mod_webapp
works except for the problem I described, which happens on every
request, so it is useless.
I have it working on RedHat 7.0 and RedHat 7.2 systems.
Okay, a simple answer from a simple mind:
Check that you are closing resources in your java code appropriately. Don't rely on
garbage collection!
Are you closing any files opened by your Java code?
Are you always closing your jdbc SQL statements/result sets, etc...?
Are you closing your Oracle
Hello,
Hi,
my comments are below.
-
Okay, a simple answer from a simple mind:
Check that you are closing resources in your java code appropriately. Don't rely on
garbage collection!
Are you closing any files opened by your Java code?
Yes, I am.
Are you always closing your
Two comments below.
fillup
Are you closing your Oracle connections? Are there too many open connections?
I am using an Oracle implementation of connection pool. Every user that log on
system get an connection from that pool. The connection will not br released
until this user close the
Here, we have the same problem!!! What can it be?
Our configuration:
- SunOS 5.8;
- Solaris 8;
- Dual UltraSparc 400Mhz;
- J2SE SUN 1.4;
- Tomcat 4.0.3;
- We are using -Xmx1024 -Xms512;
- MaxProcessors=250, MinProcessors=10, acceptCount=250;
- Oracle Thin JDBC;
PS 1: we are not having
Seems that this could be a buffering problem !
Here is the output of a simple serlvet named DBping
that accepts the oracle name/pass, connects to
database and execute a simple query. When started
DBping gets its ID (Random) so I can identify the
output in the log file. In the following
It's a
known problem with 3.2.1, upgrade to 3.2.2. Worked for me so
far...
Cheers,
--Amos
-Original Message-From: Jeff Trent
[mailto:[EMAIL PROTECTED]]Sent: Wednesday, June 13, 2001 7:40
AMTo: [EMAIL PROTECTED]Subject: Tomcat
hangs if I refer to a context that doesn't
Actually, no - otherwise, I wouldn't have
asked. I did, however, find my answer in the bugzilla database. For
those of you who are wondering, this problem occurs under 3.2.1 if you remove
the ROOT context / webapp.
-jeff
- Original Message -
From:
Thomas Bezdicek
To:
Bump up the LogLevel to DEBUG in httpd.conf file
and
look in the log for detail messages
- Original Message -
From:
Amos Shapira
To: '[EMAIL PROTECTED]'
Sent: Wednesday, June 13, 2001 4:58
AM
Subject: RE: Tomcat hangs if I refer to a
context that doesn't
: Wednesday, June 13, 2001 8:30 AM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: Re: Tomcat hangs if I refer to a context that doesn't exist
Actually, no - otherwise, I wouldn't have asked. I did, however, find my
answer in the bugzilla database. For those of you who are wondering, this
problem
Actually, yes -- read the release notes for 3.2.1 that come with the
distribution.
--jeff
- Original Message -
From: Jeff Trent [EMAIL PROTECTED]
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Sent: Wednesday, June 13, 2001 5:30 AM
Subject: Re: Tomcat hangs if I refer to a context
Oracle 8i includes its own apache server and Jserv. Jserv has a port
conflict with Tomcat's ajp12 (8007 I believe??). Stop the
Oracle/Apache/Jserv web server and you will not have the problem. It starts
by default when you start Oracle. You must reassign the port for one or the
other if you
PROTECTED]
Subject: RE: Tomcat hangs when my ORACLE database instance is running
Oracle 8i includes its own apache server and Jserv. Jserv has a port
conflict with Tomcat's ajp12 (8007 I believe??). Stop the
Oracle/Apache/Jserv web server and you will not have the problem. It starts
by default when
: Friday, June 01, 2001 1:27 PM
To: '[EMAIL PROTECTED]'
Subject: RE: Tomcat hangs when my ORACLE database instance is running
I have changed the ajp12 port for my tomcat to 9009, but I get the same
problem.
How can I stop the Oracle/Apache/Jserv web server but keep my database
instance running
What do you mean? If you mean that the dos window stops printing info at
that point, then you are up and running right there. With windows, that
is your system.out. Check your tomcat at that point. http://localhost:8080
I think that you will find that you are up and running. With windows
linux does that too but tomcat is still running.
Pressing return gives you the prompt back. Sure you dont just have to minimize
the console window in 98?
- Original Message -
From:
Michael Burke
To: [EMAIL PROTECTED]
Sent: Wednesday, April 18, 2001 6:30
PM
Thanks I realized that from a previous
response.
- Original Message -
From:
Ryan
To: [EMAIL PROTECTED]
Sent: Wednesday, April 18, 2001 10:20
PM
Subject: Re: Tomcat hangs under win
98
linux does that too but tomcat is still running.
Pressing return
On Friday 13 April 2001 21:55, you wrote:
also, i am trying to get tomcat to a jar for jdbc. i've been placing
it in different folders (/var/tomcat/lib) for it to find. i've had
no luck. how can i determine which folder tomcat is looking to for
jar files?
Read the shell scripts. In this
I do not know the solution, but i can show you a way out, run a srcipt which
sees the number of close wait (for tomcat) it is exceeds a number then
restart tomcat.
I was in a similar kind of situation and this what i had to do.
Regards,
Shuklix
-Original Message-
From: RAMAKRISHNA
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