RedHat 9
2.4.20-20.9smp

Daniel

Oscar Carrillo wrote:

Hmmm, I was under the impression this wasn't a problem anymore.

Daniel, what RH and kernel are you running?

Oscar

On Thu, 23 Oct 2003, Daniel Gibby wrote:



Search for Java IBM LD_ASSUME_KERNEL in google. That may be your problem.

Then set an environment variable in your apache and tomcat startup scripts:
export LD_ASSUME_KERNEL=2.2.5

I hope that helps. It seems to have solved my crashes.

Daniel Gibby

George Payne wrote:



I'm having problems with the IBM 1.4.1 jvm dumping core every few days under fairly light use with tomcat 4.1.27.

I'm looking for general advice (though specific advice would be even better).

Should I be looking for a new JVM? Or my programming bug or misconfig?

This problem appears to be directly or indirectly related to the use of old browsers. Each time it has happened (twice now), the logs (below) show that it was being accessed via http/1.0, which is fairly rare in the log files. It occurs right after or right before authentication.

More info:

RH 8, 2.4.20-20.8smp
apache 2.0/mod_ssl
mod_jk

**** 15/03 ssl_access_log snippet:
128.104.50.121 - - [15/Oct/2003:23:16:14 -0400] "GET / HTTP/1.0" 200 268

128.104.50.121 - - [15/Oct/2003:23:16:18 -0400] "GET /apptrack/s/myappinfo.jsp HTTP/1.0" 302 0
128.104.50.121 - - [15/Oct/2003:23:16:20 -0400] "GET /apptrack/login.jsp;jsessionid=D82BFF7D0F918CDB106C1A072EC2AB3D HTTP/1.0" 200 4
085
128.104.50.121 - - [15/Oct/2003:23:16:22 -0400] "GET /apptrack/images/applicanttracking_r2_c1.gif HTTP/1.0" 200 9669
128.104.50.121 - - [15/Oct/2003:23:16:22 -0400] "GET /apptrack/images/applicanttracking_leftimg.jpg HTTP/1.0" 200 13065
(***CRASH***)
128.104.50.121 - - [15/Oct/2003:23:16:42 -0400] "POST /apptrack/j_security_check HTTP/1.0" 500 1085
128.104.50.121 - - [15/Oct/2003:23:16:55 -0400] "GET /apptrack/login.jsp;jsessionid=D82BFF7D0F918CDB106C1A072EC2AB3D HTTP/1.0" 500 1
085


**** 22/03 ssl_access_log snippet:
149.199.60.202 - - [22/Oct/2003:18:28:27 -0400] "GET / HTTP/1.0" 200 268
149.199.60.202 - - [22/Oct/2003:18:28:28 -0400] "GET /apptrack/s/myappinfo.jsp HTTP/1.0" 302 0
149.199.60.202 - - [22/Oct/2003:18:28:28 -0400] "GET /apptrack/login.jsp;jsessionid=E7F6276FD5958C2D224B0C182A47EB1F HTTP/1.0" 200 4
085
149.199.60.203 - - [22/Oct/2003:18:28:29 -0400] "GET /apptrack/images/applicanttracking_leftimg.jpg HTTP/1.0" 304 0
149.199.60.202 - - [22/Oct/2003:18:28:30 -0400] "GET /apptrack/images/applicanttracking_r2_c1.gif HTTP/1.0" 304 0
149.199.60.203 - - [22/Oct/2003:18:28:45 -0400] "POST /apptrack/j_security_check HTTP/1.0" 302 0
(***CRASH***)
149.199.60.203 - - [22/Oct/2003:18:28:45 -0400] "GET /apptrack/s/myappinfo.jsp HTTP/1.0" 500 1085
149.199.60.203 - - [22/Oct/2003:18:28:50 -0400] "GET /apptrack/login.jsp;jsessionid=E7F6276FD5958C2D224B0C182A47EB1F HTTP/1.0" 500 1
085


********Sections of core dump file*************
NULL ------------------------------------------------------------------------
0SECTION TITLE subcomponent dump routine
NULL ===============================
1TISIGINFO signal 11 received
1TIDATETIME Date: 2003/10/22 at 18:28:45
1TIFILENAME Javacore filename: /home/tomcat/javacore.20031022.182845.3741.txt
NULL ------------------------------------------------------------------------
0SECTION XHPI subcomponent dump routine
NULL ==============================
1HPTIME Wed Oct 22 18:28:45 2003
1HPSIGRECV SIGSEGV received in ?? at 0x41c55e85 in /opt/IBMJava2-141/jre/bin/libjitc.so. Processing terminated.
1HPFULLVERSION J2RE 1.4.1 IBM build cxia32141-20030522
NULL
1HPOPENV Operating Environment
NULL ---------------------
2HPHOSTNAME Host : law5.(none)
2HPOSLEVEL OS Level : 2.4.20-20.8smp.#1 SMP Mon Aug 18 14:39:22 EDT 2003
2HPLIBCVER glibc Version : 2.3.2
2HPCPUS Processors -
3HPARCH Architecture : (not implemented)
3HPNUMCPUS How Many : (not implemented)
3HPCPUSENABLED Enabled : 4


**snip **

1XMEXCPINFO Exception Info
NULL --------------
2XMEXCPINFO JVM Exception 0x2 (subcode 0x0) occurred in thread "Ajp13Processor[8009][7]" (TID:0x10068790)
NULL
2XMNATIVESTACK Native stack at exception generation:
3XMSTACKINFO Program Name Entry Name Statement ID
3XMSTACKINFO
NULL
NULL
NULL
1XMTHDINFO Thread Info
NULL -----------
NULL
2XMFULLTHDDUMP Full thread dump Classic VM (J2RE 1.4.1 IBM build cxia32141-20030522, native threads):
3XMTHREADINFO "Ajp13Processor[8009][13]" (TID:0x10068490, sys_thread_t:0x891A140, state:R, native ID:0x7801F) prio=5
4XESTACKTRACE at java.net.SocketInputStream.socketRead0(Native Method)
4XESTACKTRACE at java.net.SocketInputStream.read(SocketInputStream.java(Compiled Code))
4XESTACKTRACE at org.apache.ajp.Ajp13.readN(Ajp13.java(Compiled Code))
4XESTACKTRACE at org.apache.ajp.Ajp13.receive(Ajp13.java(Compiled Code))
4XESTACKTRACE at org.apache.ajp.Ajp13.receiveNextRequest(Ajp13.java:274)
4XESTACKTRACE at org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:396)
4XESTACKTRACE at org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:585)
4XESTACKTRACE at java.lang.Thread.run(Thread.java:568)



George Payne Law ITC University of Virginia School of Law


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