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I have Tomcat 4.1.12 loaded on three AS400's teamed up with IBMs PTF
distribution of Apache. I got Tomcat running on one as400 and then copied the
tomcat directory to the other two AS400s. On the original install and the
third install everuthig works great. But on the second install I can only get
tomcat to work standalone. It absolutely refuses to function with the Apache
plugin. When I install the apache-tomcat plugin module to the apache config,
the Apache instance will not start.
I have had my Sys Admin guy scour the three 400's for differences, but we can
find none. PTF levels are the same. In one act of desparation we did a full
backup of one of the working machines and restored it to the non-working
machine and still ended up with the same result. I am left confounded. We
called IBM support, but since we are using the Jakarta distribution of Tomcat
they were less than helpful.
Anyone have any ideas what I can look for? Any help appreciated. Some more
details follow for those who are interested.
Larry
Further details:
*****Apache-Tomcat Plugin Configuration:
LoadModule jk_module /QSYS.LIB/QHTTPSVR.LIB/QZTCJK.SRVPGM
#Tomcat Plugin Method
JkWorkersFile /home/tomcat/jakarta-tomcat-4.1.12/conf/workers.properties
JkLogFile /www/pub/logs/jk.log
JkLogLevel error
JkMount /webpublic/* ajp13
If all of these lines are commented out, the apache instance on this machine
will start up fine.
*****The apahce job tries to start and its job log prints out these errors a
few times and then shutsdown completely:
HTTP Server instance ARLOPUB, hot backup takeover.
*****The dump on the apache job looks like this:
User Trace Dump for job 009803/QTMHHTTP/PUB. Size: 300K, Wrapped 0 times.
--- 03/04/2003 11:57:02 ---
00000001:123896 Stack Dump For Current Thread
00000001:123920 Stack: os.c:ABORT OCCURED:
00000001:124048 Stack: Library / Program Module Stmt
Procedure
00000001:124072 Stack: QSYS / QP0ZPCP2 QP0ZPCP2 553 : _CXX_PEP
00000001:124088 Stack: QSYS / QP0ZPCP2 QP0ZPCP2 539 : main
00000001:124112 Stack: QSYS / QP0ZPCPN QP0ZPCPN 813 :
Qp0zNewProcess
00000001:124128 Stack: QSYS / QP0ZPCPN QP0ZPCPN 1580 :
InvokeTargetPgm__FP11qp0z_pcp_cb
00000001:124152 Stack: QHTTPSVR / QZSRHTTP QZSRMAIN 42 : _CXX_PEP
00000001:124168 Stack: QHTTPSVR / QZSRHTTP QZSRMAIN 28 : main
00000001:124184 Stack: QHTTPSVR / QZSRCORE MAIN 685 :
apache_main
00000001:124208 Stack: QHTTPSVR / QZSRCORE MPMT_PTHRE 18 :
AS400_call_child_main
00000001:124224 Stack: QHTTPSVR / QZSRCORE MPMT_PTHRE 11 :
child_main
00000001:124240 Stack: QHTTPSVR / QZSRCORE HTTP_CONFI 5 :
ap_run_child_init
00000001:124256 Stack: QHTTPSVR / QZTCJK MOD_JK 22 :
jk_child_init
00000001:124272 Stack: QHTTPSVR / QZTCJK MOD_JK 7 :
jk_error_exit
00000001:124296 Stack: QHTTPSVR / QZSRCORE OS 33 : ap_abort
00000001:124312 Stack: QHTTPSVR / QZSRAPR OS400TRACE 1 :
apr_dstack
00000001:124328 Stack: QSYS / QP0ZCPA QP0ZUDBG 477 :
Qp0zDumpStack
00000001:124344 Stack: QSYS / QP0ZSCPA QP0ZSCPA 852 :
Qp0zSUDumpStack
00000001:124360 Stack: QSYS / QP0ZSCPA QP0ZSCPA 863 :
Qp0zSUDumpTargetStack
00000001:124360 Stack: Completed
00000001:124432 apr_dump_trace(): dump for job 009803/QTMHHTTP/PUB
TRCTCPAPP Output
*****Workers.properties looks like:
workers.java_home=/QIBM/ProdData/Java400/jdk13
workers.tomcat_home=/home/tomcat/jakarta-tomcat-4.1.12/
ps=/
worker.list=ajp13
worker.ajp13.type=ajp13
worker.ajp13.host=LOCALHOST
worker.ajp13.port=8009
*****Basic Error log looks like:
[Tue Mar 25 10:35:12 2003] [emerg] Error while opening the workers
[Tue Mar 25 10:36:16 2003] [emerg] Error while opening the workers
[Tue Mar 25 10:36:16 2003] [emerg] Error while opening the workers
[Tue Mar 25 10:37:16 2003] [emerg] Error while opening the workers
[Tue Mar 25 10:37:17 2003] [emerg] Error while opening the workers
For testing, I made workers.properties have full access rights to public, with
the same result. I also replaced workers.properties with a copy from one of
the working machines with no result. So I do not believe it is a security
issue.
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