You are viewing a plain text version of this content. The canonical link for it is here.
Posted to users@tomcat.apache.org by Dan Golob <zh...@zsolutionz.com> on 2006/05/21 13:03:55 UTC
Problem with Tomcat Unexpectedly Shutting Down
Hello Everyone,
This is a repost of a prior error which was never solved.
We are having a strange Tomcat issue on one of our client's machines. The
problem is that it shuts down randomly. There is nothing in the Tomcat Log
to indicate why this is occurring, and the Windows Event Manager simply
states that the process "shut down unexpectedly". We have tried recreating
this problem in-house, but have absolutely no luck.
We are running tomcat 5.0.27 and Java 1.4.2_06. The machine that this is
installed on is Windows 2003 with all the latest updates. Tomcat is running
in standalone mode, meaning without Apache. One other thing to note, this
installation of tomcat is using Load balancing.
If anyone can point me in a direction of where to look, it would be very
helpful. I have scoured the internet and newsgroups but can't find a
similar problem anywhere.
Recently, another installation of ours shut down with the exact same
problem. We have avoided reinstalling everything because we weren't
convinced that this would solve anything. During our research we came up
with a great number of leads, but none of them seemed to work. Please, if
you have any information as to how to solve this problem, or even where to
look for more information it would be most helpful. We are primarily
developers with very little knowledge of Tomcat as a whole, so we are
struggling to find a solution.
Thanks in advance
Dan
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
Re: Problem with Tomcat Unexpectedly Shutting Down
Posted by Martin Gainty <mg...@hotmail.com>.
Good Afternoon Dan
If your configuration mirrors everything about the clients environment
(HW/SW JVM / OS / Memory /TCP/IP Stack/ Diskspace /installed
utilities)environment (when I say everything I mean right to the letter
grade version of JVM)
with the only EXCEPTION you are not running the balancer
AND you have run every burn-in and smoke test without so much as a hiccup
with DEBUG LOGGING turned on
then the delta IS THE BALANCER there can be NO OTHER REASON
Talk to the vendor who sold them the balancer and ask their assistance
.make sure you go straight to the engineers and write EVERYTHING down they
say to do
and repreat it back to them
Install a fresh copy of the balancer which the company states is supported
(dont get trapped by we only support version 1B and not 1A)
If for whatever reason the vendor isnt responsive (no answer in 48 hours)
then notify the client that the balancer as 'unsupported' and must be backed
out of the client's env
As a very necessary cya Get your managers to rework any documentation to
specifically exclude items installed by foreign vendors
(A Foreign Vendor is anyone but yourself)
My undertstanding of balancer is that they balance the webapp software OR
they are HW based in which case they can balance multiple hosts
I know someone that knows balancers quite well if you provide me the vendor
name offline I'll ask him tommorrow
Good Luck/Viel Gluck
Martin --
This email message and any files transmitted with it contain confidential
information intended only for the person(s) to whom this email message is
addressed. If you have received this email message in error, please notify
the sender immediately by telephone or email and destroy the original
message without making a copy. Thank you.
----- Original Message -----
From: "Dan Golob" <zh...@zsolutionz.com>
To: "'Tomcat Users List'" <us...@tomcat.apache.org>; "'Martin Gainty'"
<mg...@hotmail.com>
Sent: Sunday, May 21, 2006 10:15 AM
Subject: RE: Problem with Tomcat Unexpectedly Shutting Down
> Hello Martin,
>
> The fact is our application is the only one running under tomcat.
> However,
> again, it runs fine absolutely everywhere else. As for the load balancer,
> the problem is that the client specifically paid for this feature and by
> shutting it off we will have to admit failure and refund the money. So,
> this is kind of an option that the administration will not agree with, as
> you can probably imagine.
>
> To be honest, I too think that this is a problem with the load balancer,
> but
> I have no way to prove it. Is there something we need to do for the load
> balancer to work properly? More importantly, is there a way to determine
> if
> in fact the load balancer is causing the problem? My lack of knowledge of
> Tomcat is one thing, but I have absolutely no knowledge of how a load
> balancer works at all. The most interesting bit, the load balancer is
> active, but only on one machine ... meaning, it isn't actually balancing
> anything.
>
> However, the second installation that also went down does not have load
> balancing running on it. This doesn't help my argument with the
> administration that this is truly a load balancing issue. Please keep in
> mind that we have dozens of other installations running without any
> problems.
>
> Thanks for the response, it is greatly appreciated.
> Dan
>
>
>
>
>
> -----Original Message-----
> From: Martin Gainty [mailto:mgainty@hotmail.com]
> Sent: Sunday, May 21, 2006 3:09 PM
> To: Tomcat Users List
> Subject: Re: Problem with Tomcat Unexpectedly Shutting Down
>
> If you Start each webapp independently and note behaviour of the Tomcat
> engine can you determine which webapp is causing this malady?
> Specifically if you unload your balancer / restart Tomcat /does Tomcat
> Engine shutdown unexpectedly?
> Thanks,
> Martin --
>
> This email message and any files transmitted with it contain confidential
> information intended only for the person(s) to whom this email message is
> addressed. If you have received this email message in error, please
> notify
> the sender immediately by telephone or email and destroy the original
> message without making a copy. Thank you.
>
> ----- Original Message -----
> From: "Dan Golob" <zh...@zsolutionz.com>
> To: "'Tomcat Users List'" <us...@tomcat.apache.org>
> Sent: Sunday, May 21, 2006 7:03 AM
> Subject: Problem with Tomcat Unexpectedly Shutting Down
>
>
>> Hello Everyone,
>>
>> This is a repost of a prior error which was never solved.
>>
>> We are having a strange Tomcat issue on one of our client's machines.
>> The
>> problem is that it shuts down randomly. There is nothing in the Tomcat
>> Log
>> to indicate why this is occurring, and the Windows Event Manager simply
>> states that the process "shut down unexpectedly". We have tried
>> recreating
>> this problem in-house, but have absolutely no luck.
>>
>> We are running tomcat 5.0.27 and Java 1.4.2_06. The machine that this is
>> installed on is Windows 2003 with all the latest updates. Tomcat is
>> running
>> in standalone mode, meaning without Apache. One other thing to note,
>> this
>> installation of tomcat is using Load balancing.
>>
>> If anyone can point me in a direction of where to look, it would be very
>> helpful. I have scoured the internet and newsgroups but can't find a
>> similar problem anywhere.
>>
>> Recently, another installation of ours shut down with the exact same
>> problem. We have avoided reinstalling everything because we weren't
>> convinced that this would solve anything. During our research we came up
>> with a great number of leads, but none of them seemed to work. Please,
>> if
>> you have any information as to how to solve this problem, or even where
>> to
>> look for more information it would be most helpful. We are primarily
>> developers with very little knowledge of Tomcat as a whole, so we are
>> struggling to find a solution.
>>
>> Thanks in advance
>> Dan
>>
>>
>>
>>
>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
>
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
RE: Problem with Tomcat Unexpectedly Shutting Down
Posted by Dan Golob <zh...@zsolutionz.com>.
Hello Martin,
The fact is our application is the only one running under tomcat. However,
again, it runs fine absolutely everywhere else. As for the load balancer,
the problem is that the client specifically paid for this feature and by
shutting it off we will have to admit failure and refund the money. So,
this is kind of an option that the administration will not agree with, as
you can probably imagine.
To be honest, I too think that this is a problem with the load balancer, but
I have no way to prove it. Is there something we need to do for the load
balancer to work properly? More importantly, is there a way to determine if
in fact the load balancer is causing the problem? My lack of knowledge of
Tomcat is one thing, but I have absolutely no knowledge of how a load
balancer works at all. The most interesting bit, the load balancer is
active, but only on one machine ... meaning, it isn't actually balancing
anything.
However, the second installation that also went down does not have load
balancing running on it. This doesn't help my argument with the
administration that this is truly a load balancing issue. Please keep in
mind that we have dozens of other installations running without any
problems.
Thanks for the response, it is greatly appreciated.
Dan
-----Original Message-----
From: Martin Gainty [mailto:mgainty@hotmail.com]
Sent: Sunday, May 21, 2006 3:09 PM
To: Tomcat Users List
Subject: Re: Problem with Tomcat Unexpectedly Shutting Down
If you Start each webapp independently and note behaviour of the Tomcat
engine can you determine which webapp is causing this malady?
Specifically if you unload your balancer / restart Tomcat /does Tomcat
Engine shutdown unexpectedly?
Thanks,
Martin --
This email message and any files transmitted with it contain confidential
information intended only for the person(s) to whom this email message is
addressed. If you have received this email message in error, please notify
the sender immediately by telephone or email and destroy the original
message without making a copy. Thank you.
----- Original Message -----
From: "Dan Golob" <zh...@zsolutionz.com>
To: "'Tomcat Users List'" <us...@tomcat.apache.org>
Sent: Sunday, May 21, 2006 7:03 AM
Subject: Problem with Tomcat Unexpectedly Shutting Down
> Hello Everyone,
>
> This is a repost of a prior error which was never solved.
>
> We are having a strange Tomcat issue on one of our client's machines. The
> problem is that it shuts down randomly. There is nothing in the Tomcat
> Log
> to indicate why this is occurring, and the Windows Event Manager simply
> states that the process "shut down unexpectedly". We have tried
> recreating
> this problem in-house, but have absolutely no luck.
>
> We are running tomcat 5.0.27 and Java 1.4.2_06. The machine that this is
> installed on is Windows 2003 with all the latest updates. Tomcat is
> running
> in standalone mode, meaning without Apache. One other thing to note, this
> installation of tomcat is using Load balancing.
>
> If anyone can point me in a direction of where to look, it would be very
> helpful. I have scoured the internet and newsgroups but can't find a
> similar problem anywhere.
>
> Recently, another installation of ours shut down with the exact same
> problem. We have avoided reinstalling everything because we weren't
> convinced that this would solve anything. During our research we came up
> with a great number of leads, but none of them seemed to work. Please, if
> you have any information as to how to solve this problem, or even where to
> look for more information it would be most helpful. We are primarily
> developers with very little knowledge of Tomcat as a whole, so we are
> struggling to find a solution.
>
> Thanks in advance
> Dan
>
>
>
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
Re: Problem with Tomcat Unexpectedly Shutting Down
Posted by Martin Gainty <mg...@hotmail.com>.
If you Start each webapp independently and note behaviour of the Tomcat
engine can you determine which webapp is causing this malady?
Specifically if you unload your balancer / restart Tomcat /does Tomcat
Engine shutdown unexpectedly?
Thanks,
Martin --
This email message and any files transmitted with it contain confidential
information intended only for the person(s) to whom this email message is
addressed. If you have received this email message in error, please notify
the sender immediately by telephone or email and destroy the original
message without making a copy. Thank you.
----- Original Message -----
From: "Dan Golob" <zh...@zsolutionz.com>
To: "'Tomcat Users List'" <us...@tomcat.apache.org>
Sent: Sunday, May 21, 2006 7:03 AM
Subject: Problem with Tomcat Unexpectedly Shutting Down
> Hello Everyone,
>
> This is a repost of a prior error which was never solved.
>
> We are having a strange Tomcat issue on one of our client's machines. The
> problem is that it shuts down randomly. There is nothing in the Tomcat
> Log
> to indicate why this is occurring, and the Windows Event Manager simply
> states that the process "shut down unexpectedly". We have tried
> recreating
> this problem in-house, but have absolutely no luck.
>
> We are running tomcat 5.0.27 and Java 1.4.2_06. The machine that this is
> installed on is Windows 2003 with all the latest updates. Tomcat is
> running
> in standalone mode, meaning without Apache. One other thing to note, this
> installation of tomcat is using Load balancing.
>
> If anyone can point me in a direction of where to look, it would be very
> helpful. I have scoured the internet and newsgroups but can't find a
> similar problem anywhere.
>
> Recently, another installation of ours shut down with the exact same
> problem. We have avoided reinstalling everything because we weren't
> convinced that this would solve anything. During our research we came up
> with a great number of leads, but none of them seemed to work. Please, if
> you have any information as to how to solve this problem, or even where to
> look for more information it would be most helpful. We are primarily
> developers with very little knowledge of Tomcat as a whole, so we are
> struggling to find a solution.
>
> Thanks in advance
> Dan
>
>
>
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
Re: Problem with Tomcat Unexpectedly Shutting Down
Posted by Mark Thomas <ma...@apache.org>.
When starting a new thread (ie sending a message to the list about a
new topic) please do not reply to an existing message and change the
subject line. To many of the list archiving services and mail clients
used by list subscribers this makes your new message appear as part
of the old thread. This makes it harder for other users to find
relevant information when searching the lists.
This is known as thread hijacking and is that is frowned
upon on this list. Frequent offenders will be removed from the list.
It should also be noted that many list subscribers automatically
ignore any messages that hijack another thread.
The correct procedure is to create a new message with a new subject.
This will start a new thread.
Mark
tomcat-user-owner
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
Re: Problem with Tomcat Unexpectedly Shutting Down
Posted by Hassan Schroeder <ha...@gmail.com>.
On 5/21/06, Dan Golob <zh...@zsolutionz.com> wrote:
> We are having a strange Tomcat issue on one of our client's machines. The
> problem is that it shuts down randomly. There is nothing in the Tomcat Log
> to indicate why this is occurring, and the Windows Event Manager simply
> states that the process "shut down unexpectedly".
What level of logging are you running? If not at DEBUG, you might
try cranking that up -- generates a lot of data, so maybe rotate logs
hourly or so :-)
Also, you might try running visualgc against that system; at least if
(when!) it dies again you'll have a snapshot of memory use leading
up to the end, which might offer some clues.
You could also use the Tomcat manager interface to grab status
from the system periodically for post-crash analysis.
HTH!
--
Hassan Schroeder ------------------------ hassan.schroeder@gmail.com
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org