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From "Ferit Albukrek" <falbuk...@sbigroup.com>
Subject Tomcat/JVM dumps core on unexpected signal 11 - intermittent behavior
Date Thu, 26 Feb 2004 16:54:14 GMT
 
Hello,
 
I am seeking help in diagnosing possible causes for an intermittent
crash we are experiencing with:

* Tomcat/4.1.24
* Apache/1.3.27
* mod_jk2/2.0.3
* Java 1.3.1_10
* SunOS 5.8

#### What Happens:
* JVM core dumps and reports unexpected signal 11.  (see below for the
log file message)
* Strange anomaly in the catalina.out file: some threads have very large
numbers. For example:

	DEBUG 26 Feb 2004 11:34:27,456 [Thread-84] (?:?) - Adding
transient cookie ...U1375264
	DEBUG 26 Feb 2004 11:34:30,987 [Thread-14] (?:?) - Adding
transient cookie ...U1375265
	DEBUG 26 Feb 2004 11:34:33,811 [Thread-1148] (?:?) - Adding
transient cookie ...U1375266
	DEBUG 26 Feb 2004 11:34:34,290 [Thread-1465] (?:?) - Adding
transient cookie ...U1375267
	DEBUG 26 Feb 2004 11:34:36,202 [Thread-1335] (?:?) - Adding
transient cookie ...U1375268


#### What I Have Found So Far:
* Googled for the error code.  Sun has tagged it as irreproducible.
* Many people have similar problems on other app server platforms.
Nothing conclusive on fixes or cause however.
* Tried jProfiler to see how the application behaves, but have not found
any tip-offs.

#### My Questions:
* Is it normal to have thread numbers in the thousands?  Usually there
are one or two out-lyers initially, but they slowly increase.
* Where do you think I should look for possible causes?
* Have you encountered anything similar?

Thank you for your help,

- Ferit



#### JVM Error file
Unexpected Signal : 11 occurred at PC=0xfacb7014
Function name=put (compiled Java code)
Library=(N/A)

Current Java thread:

Dynamic libraries:
0x10000         /usr/j2se/bin/../bin/sparc/native_threads/java
0xff350000      /usr/lib/libthread.so.1
0xff390000      /usr/lib/libdl.so.1
0xff200000      /usr/lib/libc.so.1
0xff340000      /usr/platform/SUNW,Sun-Fire-280R/lib/libc_psr.so.1
0xfe000000      /usr/j2se/jre/lib/sparc/server/libjvm.so
0xff2e0000      /usr/lib/libCrun.so.1
0xff1e0000      /usr/lib/libsocket.so.1
0xff100000      /usr/lib/libnsl.so.1
0xff0d0000      /usr/lib/libm.so.1
0xff310000      /usr/lib/libw.so.1
0xff0b0000      /usr/lib/libmp.so.2
0xff080000      /usr/j2se/jre/lib/sparc/native_threads/libhpi.so
0xff050000      /usr/j2se/jre/lib/sparc/libverify.so
0xfe7c0000      /usr/j2se/jre/lib/sparc/libjava.so
0xff020000      /usr/j2se/jre/lib/sparc/libzip.so
0xd6560000      /usr/j2se/jre/lib/sparc/libnet.so
0xd6540000      /usr/lib/nss_files.so.1

Local Time = Wed Feb 25 10:54:19 2004
Elapsed Time = 39556
#
# HotSpot Virtual Machine Error : 11
# Error ID : 4F530E43505002C4 01
# Please report this error at
# http://java.sun.com/cgi-bin/bugreport.cgi 
  
 
 
ferit albukrek
director of technology
sbi.razorfish
617 250 2904 direct
617 504 9477 mobile
falbukrek@sbigroup.com <mailto:falbukrek@sbigroup.com>  
www.sbigroup.com <http://www.sbigroup.com/>  

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