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From Daren Desjardins <>
Subject Tomcat dies with Signal 11
Date Tue, 20 Nov 2001 21:25:45 GMT
We are running our webapp on Tomcat 3.2.2 and have been experiencing a
Signal 11 Stack Overflow error occasionaly. It occured on two machines
one day, 1 machine the next, and 3 the on third day.  The error states
it occurred in function 'Clone'. At first we thought it might be caused
by some kind of recursion. However we were unable to find any code that
could cause the problem. Also, given the site usage and error
infrequency, we would think a recursion issue would occur more
frequently. All infinite recursion tests we performed cause a stack dump
to occur, which does not happen in this case. From this we are wondering
if the issue lies in Tomcat... We are hoping someone could point us in
the direction of what could be causing this.

Daren Desjardins
Server Specs:

- We are running tomcat on 8 E4500's, each with 12 cpus and 8gig of
- Each site has 400-900 concurrent users throughout the day
- JVM Params:
    -server -XX:NewSize=128m -XX:MaxNewSize=512m -Xms512m -Xmx1792m
    -XX:SurvivorRatio=8 -verbose:gc

Tomcat error:

An irrecoverable stack overflow has occurred.

Unexpected Signal : 11 occurred at PC=0xeb0707f4
Function name=clone (compiled Java code)

Current Java thread:

Dynamic libraries:
0x10000         /usr/j2sdk1_3_1/bin/../bin/sparc/native_threads/java
0xef770000      /usr/lib/
0xef7b0000      /usr/lib/
0xef680000      /usr/lib/
0xef750000      /usr/platform/SUNW,Ultra-Enterprise/lib/
0xee400000      /usr/j2sdk1_3_1/jre/lib/sparc/server/
0xef630000      /usr/lib/
0xef610000      /usr/lib/
0xef500000      /usr/lib/
0xef5e0000      /usr/lib/
0xef660000      /usr/lib/
0xef5b0000      /usr/lib/
0xef4d0000      /usr/j2sdk1_3_1/jre/lib/sparc/native_threads/
0xef4a0000      /usr/j2sdk1_3_1/jre/lib/sparc/
0xef460000      /usr/j2sdk1_3_1/jre/lib/sparc/
0xef430000      /usr/j2sdk1_3_1/jre/lib/sparc/
0xeeae0000      /usr/lib/locale/en_US/
0xed3e0000      /usr/j2sdk1_3_1/jre/lib/sparc/
0xed3c0000      /usr/lib/

Local Time = Mon Nov 19 12:59:02 2001
Elapsed Time = 47314
# HotSpot Virtual Machine Error : 11
# Error ID : 4F530E43505002CC 01
# Please report this error at
# Java VM: Java HotSpot(TM) Server VM (1.3.1-b24 mixed mode)
# An error report file has been saved as hs_err_pid8792.log.
# Please refer to the file for further information.


My other computer is your windows box.
The more money I give to microsoft, the more vulnerable windows become.

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