From: Lisa Weihl (lweihl@cs.bgsu.edu)
Date: Tue Sep 26 2006 - 11:57:38 EDT
Hi all,
Very new to Solaris 10 and it's new way of handling a lot of
things. I have a new Sun Fire T2000 running Solaris 10 6/06. I
recently setup accounts for an advanced networking course on this
server. The students are writing programs that are using fork and I
believe some of them are causing infinite loops. Twice in the last
two days the server has crashed. A power cycle brings it back up
each time. There are only two helpful messages in the log:
On the 24th I had:
/etc/svc/volatile:File system full, swap space limit exceeded
and also lots and lots of the following....
sendmail [306]: rejecting connections on daemon NoMTA4:load average: somenumber
where somenumber ranged from the hundreds to the thousands.
Last night, the 25th the server crashed again but I only had the
sendmail error messages listed this time. I figured the "file system
full" messge from the 24th just had to do with someone managing to
fill up /tmp.
This morning the faculty member for the course wrote a program to
fork a lot of processes, ran it and immediately the machine hung
requiring a reboot and the familiar sendmail message was in the log.
Clearly these crashes are tied to users having runaway fork calls but
I've never see a server allow a user to fork enough processes to
bring a machine down. Can anyone steer me in the right direction for
commands to use and things to check to get to the bottom of this problem?
Thanks,
Lisa
**********************************************************************************
Lisa Weihl, System Administrator E-mail: lweihl@cs.bgsu.edu
Department of Computer Science Office: Hayes 225
Bowling Green State University Phone: (419) 372-0116
Bowling Green, Ohio 43403-0214 Fax: (419) 372-8061
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