Daniel,
On 8/28/23 14:37, Daniel Savard wrote:
Le jeu. 24 août 2023 à 13:06, Christopher Schultz <
ch...@christopherschultz.net> a écrit :
Daniel,
On 8/23/23 13:03, Daniel Savard wrote:
I didn't specify the actual Tomcat version because the problem occurs
under
all versions. We are running a commercial web application and all of
sudden
after a while Tomcat is crashing without issuing any message. It is very
likely due to the application. But the vendor was of no help to solve
this
problem which has existed for a long time. I suspect something like
insufficient memory allocated to the VM or something like that. Is there
anything I can do to gather more information on the root cause of this
issue?
Tomcat is running as a service and is restarted automatically if it
crashes. Again, the problem is very unlikely to be with Tomcat itself,
but
the tuning of the VM.
What kind of environment (e.g. Windows vs UNIX, etc.)? What is running
the service? Are there log files for the service which are different
than usual (e.g. syslog vs catalina.out)?
What are your memory settings, and how much physical RAM do you have?
It's unlikely that the JVM is just disappearing without leaving any
trace. If you are on Linux, maybe you are the victim of oome-killer?
That will show in the syslog with a whole lot of output. Search syslog
for "oom" and you will probably find it right away if that's the cause.
-chris
Hi Chris,
Thanks for the answer. It is running on Windows and it is running as a
service which is configured to restart if it fails. No different log files
at my knowledge except application logs.
There is 14 GB physical RAM on this server. Initial memory pool is 4 GB and
maximum memory pool is 8 GB.
Well, the only thing I can say is Tomcat is failing at some point and
shutting itself down or being shutdown or killed, I cannot say the JVM
itself gets killed.
Windows... so Linux oome killer isn't a likely cause :)
"Windows Service" could mean a lot of things. Are you using the
procrun-based service that Tomcat ships with? That should create
stderr-* and stdout-* files in your logs directory which will be
completely different than application logs.
Look at catalina.out, stderr/stdout and see if you see anything in there
around the suspected time of termination.
-chris
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