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Posted to users@tomcat.apache.org by Adlane ACHAB <ad...@gmail.com> on 2009/02/12 16:08:18 UTC
Tomcat unexpectedly shuts down
hi, below is my tomcat config
Tomcat VersionJVM VersionJVM VendorOS NameOS VersionOS ArchitectureApache
Tomcat/6.0.181.6.0-b105Sun Microsystems Inc.Linux2.6.23.12i386
Essentially what happens is this:
The server is running along fine, and then all of a sudden, for no apparent
reason that we can find, the server shuts down. The timing does not seem to
coincide with any stack trace.
Just Tomcat service terminated unexpectedly.
please help
Re: Tomcat unexpectedly shuts down
Posted by Juha Laiho <Ju...@iki.fi>.
Adlane ACHAB wrote:
> hi, below is my tomcat config
>
> Tomcat VersionJVM VersionJVM VendorOS NameOS VersionOS ArchitectureApache
> Tomcat/6.0.181.6.0-b105Sun Microsystems Inc.Linux2.6.23.12i386
>
>
> Essentially what happens is this:
>
> The server is running along fine, and then all of a sudden, for no apparent
> reason that we can find, the server shuts down. The timing does not seem to
> coincide with any stack trace.
>
> Just Tomcat service terminated unexpectedly.
I did see something like this, quite some time ago. Details differ a lot;
the env was Tomcat 4.something, running on Solaris. However the symptoms
did match: the Tomcat process just disappeared.
What did help in our case was to wrap the startup in another layer of scripts
which did redirect all the standard file descriptors to/from specified files
(or /dev/null in case of standard input), and additionally start tomcat under
"nohup" (protected from session hangup signal).
What we suppose did happen:
- admin started the tomcat (on a shell session)
- the shell session was forgotten open, and the corresponding TCP
connection later timed out at firewall
- at some point some piece of code attempted to write to System.out
or System.err, or read from System.in
- this activity caused the machine TCP layer to notice that the TCP
connection was not valid any longer, and so the shell from which
Tomcat was started (and the Tomcat process, too) did get a hangup
signal, causing both the shell and Tomcat to just stop and exit
We could never positively prove the above, but that would suit the symptoms,
and also the above would be something for which our cure would be effective.
--
..Juha
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RE: Tomcat unexpectedly shuts down
Posted by Peter Crowther <Pe...@melandra.com>.
> From: Adlane ACHAB [mailto:adlane.achab@gmail.com]
> Tomcat VersionJVM VersionJVM VendorOS NameOS VersionOS
> ArchitectureApache
> Tomcat/6.0.181.6.0-b105Sun Microsystems Inc.Linux2.6.23.12i386
>
>
> Essentially what happens is this:
>
> The server is running along fine, and then all of a sudden,
> for no apparent
> reason that we can find, the server shuts down. The timing
> does not seem to
> coincide with any stack trace.
>
> Just Tomcat service terminated unexpectedly.
http://linux-mm.org/OOM_Killer ? The JVM is often the largest user of memory on the system, and hence the first victim when the killer has to run.
Note the line in there "Finally the accumulated score is bitshifted by the user-settable value of /proc/<pid>/oomadj" - if it *is* the OOM killer, you can at least cause it not to kill Tomcat but to choose some other victim :-).
- Peter
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Re: Tomcat unexpectedly shuts down
Posted by Adlane ACHAB <ad...@gmail.com>.
I don't think that's a memory problem
[image: daily graph]
2009/2/12 Caldarale, Charles R <Ch...@unisys.com>
> > From: Adlane ACHAB [mailto:adlane.achab@gmail.com]
> > Subject: Re: Tomcat unexpectedly shuts down
> >
> > no, idon't find any exception on logs
>
> There won't be any messages in the Tomcat logs, since the kernel just
> terminates the entire selected process without warning when the OOM killer
> fires up.
>
> - Chuck
>
>
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Tél : 06 13 46 66 21
adlane.achab@gmail.com
RE: Tomcat unexpectedly shuts down
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Adlane ACHAB [mailto:adlane.achab@gmail.com]
> Subject: Re: Tomcat unexpectedly shuts down
>
> no, idon't find any exception on logs
There won't be any messages in the Tomcat logs, since the kernel just terminates the entire selected process without warning when the OOM killer fires up.
- Chuck
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Re: Tomcat unexpectedly shuts down
Posted by Adlane ACHAB <ad...@gmail.com>.
no, idon't find any exception on logs
2009/2/12 Mark Thomas <ma...@apache.org>
> Adlane ACHAB wrote:
> > hi, below is my tomcat config
> >
> > Tomcat VersionJVM VersionJVM VendorOS NameOS VersionOS ArchitectureApache
> > Tomcat/6.0.181.6.0-b105Sun Microsystems Inc.Linux2.6.23.12i386
> >
> >
> > Essentially what happens is this:
> >
> > The server is running along fine, and then all of a sudden, for no
> apparent
> > reason that we can find, the server shuts down. The timing does not seem
> to
> > coincide with any stack trace.
> >
> > Just Tomcat service terminated unexpectedly.
> >
> > please help
> >
>
> Linux OOM killer?
>
> Mark
>
>
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Adlane ACHAB
Tél : 06 13 46 66 21
adlane.achab@gmail.com
Re: Tomcat unexpectedly shuts down
Posted by Christopher Schultz <ch...@christopherschultz.net>.
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Hash: SHA1
Chuck,
On 2/12/2009 10:30 AM, Caldarale, Charles R wrote:
>> From: Gregor Schneider [mailto:rc46fi@googlemail.com]
>> Subject: Re: Tomcat unexpectedly shuts down
>>
>> @Chuck: never heard about the OOM-killer.
>
> GIYF. A nasty beast, at best.
Even better, MIYF (man is your friend). The man page for malloc on Linux
talks about the OOM killer, and even tells you how to disable it. (!)
>> But what I almost can't believe is that if such a
>> thing exists, that it doesn't carve it's footprints
>> into syslog...
>
> Likely, but since the OP used the term "exception", I expect he was
> referring to the Tomcat, not system, logs.
Syslog should contain something like:
Out of Memory: Killed process [PID] [process name]
if the kernel murdered your process to reclaim memory.
- -chris
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RE: Tomcat unexpectedly shuts down
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Gregor Schneider [mailto:rc46fi@googlemail.com]
> Subject: Re: Tomcat unexpectedly shuts down
>
> @Chuck: never heard about the OOM-killer.
GIYF. A nasty beast, at best.
> But what I almost can't believe is that if such a
> thing exists, that it doesn't carve it's footprints
> into syslog...
Likely, but since the OP used the term "exception", I expect he was referring to the Tomcat, not system, logs.
- Chuck
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Re: Tomcat unexpectedly shuts down
Posted by André Warnier <aw...@ice-sa.com>.
Gregor Schneider wrote:
>
> @Chuck: never heard about the OOM-killer.
The Tomcat security team have been trying to find this guy for several
years now, but they're being very discreet about it.
One of the difficulties is that he cleans up after himself by wiping out
any memory of its intervention.
You have probably heard many times about him in the past, you just have
forgotten. That's a sure sign.
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Re: Tomcat unexpectedly shuts down
Posted by Gregor Schneider <rc...@googlemail.com>.
What's Linux /var/log/syslog saying? Anything in there?
@Chuck: never heard about the OOM-killer. But what I almost can't
believe is that if such a thing exists, that it doesn't carve it's
footprints into syslog...
Puzzled...
Gregor
--
just because your paranoid, doesn't mean they're not after you...
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Re: Tomcat unexpectedly shuts down
Posted by Christopher Schultz <ch...@christopherschultz.net>.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Adlane,
On 2/12/2009 12:38 PM, Adlane ACHAB wrote:
> I think that will produce a hugh log file,The problem is that, tomcat didn't
> shutdown directly after start, it can run for one or two days and stop
> unexpectedly
... then look at the *end* of the file when it *does* go down.
- -chris
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Re: Tomcat unexpectedly shuts down
Posted by Pieter Temmerman <pt...@sadiel.es>.
Ok, then it's not an option.
I thought it shut down just after a short while.
I'm out of ideas...
On Thu, 2009-02-12 at 18:38 +0100, Adlane ACHAB wrote:
> I think that will produce a hugh log file,The problem is that, tomcat didn't
> shutdown directly after start, it can run for one or two days and stop
> unexpectedly
>
> 2009/2/12 Pieter Temmerman <pt...@sadiel.es>
>
> > What about attaching strace to the tomcat process?
> > Try executing "strace ./bin/catalina.sh run"
> >
> > On Thu, 2009-02-12 at 18:01 +0100, Adlane ACHAB wrote:
> > > no, I check the var/log/syslog, no trace of oom killer
> > >
> > > 2009/2/12 Gregor Schneider <rc...@googlemail.com>
> > >
> > > > Again:
> > > >
> > > > Anything in /var/log/syslog?
> > > >
> > > > If OOMKiller was invoked, there should be somehhing like
> > > >
> > > > Dec 16 10:31:17 velo kernel: [611084.971774] kded invoked oom-killer:
> > > > gfp_mask=0x1201d2, order=0, oomkilladj=0
> > > >
> > > > Rgds
> > > >
> > > > Gregor
> > > > --
> > > > just because your paranoid, doesn't mean they're not after you...
> > > > gpgp-fp: 79A84FA526807026795E4209D3B3FE028B3170B2
> > > > gpgp-key available @ http://pgpkeys.pca.dfn.de:11371
> > > >
> > > > ---------------------------------------------------------------------
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> > > >
> > > >
> > >
> > >
> > --
> > Pieter Temmerman
> > email: ptemmerman.ext@sadiel.es
> > skype: ptemmerman.sadiel
> >
> > SADIEL TECNOLOGÍAS DE LA INFORMACIÓN, S.A. http://www.sadiel.es.
> >
> >
> >
> >
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> >
> >
>
>
--
Pieter Temmerman
email: ptemmerman.ext@sadiel.es
skype: ptemmerman.sadiel
SADIEL TECNOLOGÍAS DE LA INFORMACIÓN, S.A. http://www.sadiel.es.
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Re: Tomcat unexpectedly shuts down
Posted by Adlane ACHAB <ad...@gmail.com>.
I think that will produce a hugh log file,The problem is that, tomcat didn't
shutdown directly after start, it can run for one or two days and stop
unexpectedly
2009/2/12 Pieter Temmerman <pt...@sadiel.es>
> What about attaching strace to the tomcat process?
> Try executing "strace ./bin/catalina.sh run"
>
> On Thu, 2009-02-12 at 18:01 +0100, Adlane ACHAB wrote:
> > no, I check the var/log/syslog, no trace of oom killer
> >
> > 2009/2/12 Gregor Schneider <rc...@googlemail.com>
> >
> > > Again:
> > >
> > > Anything in /var/log/syslog?
> > >
> > > If OOMKiller was invoked, there should be somehhing like
> > >
> > > Dec 16 10:31:17 velo kernel: [611084.971774] kded invoked oom-killer:
> > > gfp_mask=0x1201d2, order=0, oomkilladj=0
> > >
> > > Rgds
> > >
> > > Gregor
> > > --
> > > just because your paranoid, doesn't mean they're not after you...
> > > gpgp-fp: 79A84FA526807026795E4209D3B3FE028B3170B2
> > > gpgp-key available @ http://pgpkeys.pca.dfn.de:11371
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> > > For additional commands, e-mail: users-help@tomcat.apache.org
> > >
> > >
> >
> >
> --
> Pieter Temmerman
> email: ptemmerman.ext@sadiel.es
> skype: ptemmerman.sadiel
>
> SADIEL TECNOLOGÍAS DE LA INFORMACIÓN, S.A. http://www.sadiel.es.
>
>
>
>
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Adlane ACHAB
Tél : 06 13 46 66 21
adlane.achab@gmail.com
Re: Tomcat unexpectedly shuts down
Posted by Pieter Temmerman <pt...@sadiel.es>.
What about attaching strace to the tomcat process?
Try executing "strace ./bin/catalina.sh run"
On Thu, 2009-02-12 at 18:01 +0100, Adlane ACHAB wrote:
> no, I check the var/log/syslog, no trace of oom killer
>
> 2009/2/12 Gregor Schneider <rc...@googlemail.com>
>
> > Again:
> >
> > Anything in /var/log/syslog?
> >
> > If OOMKiller was invoked, there should be somehhing like
> >
> > Dec 16 10:31:17 velo kernel: [611084.971774] kded invoked oom-killer:
> > gfp_mask=0x1201d2, order=0, oomkilladj=0
> >
> > Rgds
> >
> > Gregor
> > --
> > just because your paranoid, doesn't mean they're not after you...
> > gpgp-fp: 79A84FA526807026795E4209D3B3FE028B3170B2
> > gpgp-key available @ http://pgpkeys.pca.dfn.de:11371
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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> >
> >
>
>
--
Pieter Temmerman
email: ptemmerman.ext@sadiel.es
skype: ptemmerman.sadiel
SADIEL TECNOLOGÍAS DE LA INFORMACIÓN, S.A. http://www.sadiel.es.
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Re: Tomcat unexpectedly shuts down
Posted by Adlane ACHAB <ad...@gmail.com>.
no, I check the var/log/syslog, no trace of oom killer
2009/2/12 Gregor Schneider <rc...@googlemail.com>
> Again:
>
> Anything in /var/log/syslog?
>
> If OOMKiller was invoked, there should be somehhing like
>
> Dec 16 10:31:17 velo kernel: [611084.971774] kded invoked oom-killer:
> gfp_mask=0x1201d2, order=0, oomkilladj=0
>
> Rgds
>
> Gregor
> --
> just because your paranoid, doesn't mean they're not after you...
> gpgp-fp: 79A84FA526807026795E4209D3B3FE028B3170B2
> gpgp-key available @ http://pgpkeys.pca.dfn.de:11371
>
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Adlane ACHAB
Tél : 06 13 46 66 21
adlane.achab@gmail.com
Re: Tomcat unexpectedly shuts down
Posted by Gregor Schneider <rc...@googlemail.com>.
Again:
Anything in /var/log/syslog?
If OOMKiller was invoked, there should be somehhing like
Dec 16 10:31:17 velo kernel: [611084.971774] kded invoked oom-killer:
gfp_mask=0x1201d2, order=0, oomkilladj=0
Rgds
Gregor
--
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Re: Tomcat unexpectedly shuts down
Posted by Adlane ACHAB <ad...@gmail.com>.
but I think that we have enough memory,so the Linux OOM killer will not act.
will do?
2009/2/12 Caldarale, Charles R <Ch...@unisys.com>
> > From: Adlane ACHAB [mailto:adlane.achab@gmail.com]
> > Subject: Re: Tomcat unexpectedly shuts down
> >
> > no, nothing about shutdown in tomcat logs, it just abruptly stop
>
> Then it is almost definitely the Linux OOM killer.
>
> - Chuck
>
>
> THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
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Tél : 06 13 46 66 21
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RE: Tomcat unexpectedly shuts down
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Adlane ACHAB [mailto:adlane.achab@gmail.com]
> Subject: Re: Tomcat unexpectedly shuts down
>
> no, nothing about shutdown in tomcat logs, it just abruptly stop
Then it is almost definitely the Linux OOM killer.
- Chuck
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Re: Tomcat unexpectedly shuts down
Posted by Adlane ACHAB <ad...@gmail.com>.
no, nothing about shutdown in tomcat logs, it just abruptly stop
I will check for jar files
2009/2/12 Caldarale, Charles R <Ch...@unisys.com>
> > From: Adlane ACHAB [mailto:adlane.achab@gmail.com]
> > Subject: Re: Tomcat unexpectedly shuts down
> >
> > no, i grep "System.exit" and no result found
>
> And did you look inside all jars that your webapps might be using as
> libraries? You can disable System.exit() with a SecurityManager, if
> desired.
>
> Do the Tomcat logs show a normal shutdown sequence, or do they just
> abruptly stop?
>
> - Chuck
>
>
> THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
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Tél : 06 13 46 66 21
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RE: Tomcat unexpectedly shuts down
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Adlane ACHAB [mailto:adlane.achab@gmail.com]
> Subject: Re: Tomcat unexpectedly shuts down
>
> no, i grep "System.exit" and no result found
And did you look inside all jars that your webapps might be using as libraries? You can disable System.exit() with a SecurityManager, if desired.
Do the Tomcat logs show a normal shutdown sequence, or do they just abruptly stop?
- Chuck
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Re: Tomcat unexpectedly shuts down
Posted by Adlane ACHAB <ad...@gmail.com>.
no, i grep "System.exit" and no result found
2009/2/12 Caldarale, Charles R <Ch...@unisys.com>
> > From: Mark Thomas [mailto:markt@apache.org]
> > Subject: Re: Tomcat unexpectedly shuts down
> >
> > > The server is running along fine, and then all of
> > > a sudden, for no apparent reason that we can find,
> > > the server shuts down.
> >
> > Linux OOM killer?
>
> Or perhaps code in one of your webapps calling System.exit()?
>
> - Chuck
>
>
> THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
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Tél : 06 13 46 66 21
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RE: Tomcat unexpectedly shuts down
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Mark Thomas [mailto:markt@apache.org]
> Subject: Re: Tomcat unexpectedly shuts down
>
> > The server is running along fine, and then all of
> > a sudden, for no apparent reason that we can find,
> > the server shuts down.
>
> Linux OOM killer?
Or perhaps code in one of your webapps calling System.exit()?
- Chuck
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Re: Tomcat unexpectedly shuts down
Posted by Mark Thomas <ma...@apache.org>.
Adlane ACHAB wrote:
> hi, below is my tomcat config
>
> Tomcat VersionJVM VersionJVM VendorOS NameOS VersionOS ArchitectureApache
> Tomcat/6.0.181.6.0-b105Sun Microsystems Inc.Linux2.6.23.12i386
>
>
> Essentially what happens is this:
>
> The server is running along fine, and then all of a sudden, for no apparent
> reason that we can find, the server shuts down. The timing does not seem to
> coincide with any stack trace.
>
> Just Tomcat service terminated unexpectedly.
>
> please help
>
Linux OOM killer?
Mark
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