Greetings,
I'm hoping someone here can give me a pointer or two in troubleshooting
an
unexpected Tomcat shutdown. I have been searching the mailing list
archives
and googling (web and groups) for hints on this, but so far with no
success.
Sometime between March 6 and April 11, I see the following lines in my
catalina.out file:
Java HotSpot(TM) Client VM warning: cannot install alternate
signal stack
Java HotSpot(TM) Client VM warning: cannot uninstall alt signal
stack
All told, there are over 6400 lines, with the above two lines
alternating.
After these 6400 lines, I see the following:
****************
Another exception has been detected while we were handling last
error.
Dumping information about last error:
ERROR REPORT FILE = (N/A)
PC = 0xf62bbd2c
SIGNAL = 11
FUNCTION NAME = (N/A)
OFFSET = 0xFFFFFFFF
LIBRARY NAME = (N/A)
Please check ERROR REPORT FILE for further information, if there
is any.
Good bye.
Tomcat was restarted, and I have not seen these messages since.
I've googled for the error messages, but haven't found anything that
would
point to the cause.
This does not seem to be an easily repeatable occurrence. It has
happened
twice in the last year on a production machine. I've tried to reproduce
this
on a test machine running the same versions of Tomcat and Java with a
machine
under as close a load as the production box as possible, but with no
success.
Here are some details of the environment.
Tomcat Version: 4.1.31
Java Version: 1.4.2_07
OS: RedHat Enterprise Linux 3, update 2, SMB kernel, i386
We have set up a monitor and auto-restart job on the production box in
order
to minimize downtime, but since this is a fairly critical server, I
would like
to prevent this from occuring again if at all possible. If anyone has a
hint
or two to help me understand what happened, that would be most
appreciated.
One specific questions, if I may. Where would "ERROR REPORT FILE" be
found,
and if it's not, does anyone know how I can force one to be created? I
don't
see any likely files on the system, but it's possible (likely, even)
that I
just don't know the name or location.
Thank you for your time,
Dean Maki
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