Java 1.5.0_17 core dumps

Question

Hi All,
We have a java application which works in protocol level. Our java application uses JNI to interact with others modules which are written in C++.
We are doing stress testing on the application. after that, we are stopping the java application and starting it. when this action happens java core dumps.
when i see the core dump using gdb it show the following message.
Core was generated by `java -server -Xmn64M -Xms170M -Xmx170M -cp :../lib/servic
es.jar:../lib/commons-'.
Program terminated with signal 3, Quit.
#0 0x400ea621 in nanosleep () from /lib/libc.so.6
(gdb) where
#0 0x400ea621 in nanosleep () from /lib/libc.so.6
#1 0x400208ee in __pthread_timedsuspend_new (self=0xbf1ffc00,
abstime=0xbf1ff914) at pthread.c:1125
#2 0x4001d183 in pthread_cond_timedwait_relative (cond=0x805ce38,
mutex=0x805ce20, abstime=0xbf1ff914) at restart.h:45
#3 0x405a666c in os::Linux::safe_cond_timedwait ()
from /sw/linuxapps/usr/java/jre1.5.0_17/lib/i386/server/libjvm.so
#4 0x4058db51 in Monitor::wait ()
from /sw/linuxapps/usr/java/jre1.5.0_17/lib/i386/server/libjvm.so
#5 0x40689c6b in VMThread::loop ()
from /sw/linuxapps/usr/java/jre1.5.0_17/lib/i386/server/libjvm.so
#6 0x406898d0 in VMThread::run ()
from /sw/linuxapps/usr/java/jre1.5.0_17/lib/i386/server/libjvm.so
#7 0x405a7408 in _start ()
from /sw/linuxapps/usr/java/jre1.5.0_17/lib/i386/server/libjvm.so
#8 0x4001dfb7 in pthread_start_thread (arg=0xbf1ffc00) at manager.c:284
#9 0x4011d84a in clone () from /lib/libc.so.6
Please provide your thoughts or suggestions. is this a known issue in JVM? or this is not related to JVM issue?
Thanks
iramar.

Answer 1

"stopping" and "starting" are two actions here. Which action triggered core dumps? How did you stop the application?
From your gdb message, the core dump was generated when your java application received a "kill -QUIT" signal.
In my Solaris java 1.5.0_10 environment, if you had a "-Xs" in your java option, the "kill -QUIT" signal will generate a core dump