Tomcat & Apache on Three AS400's -- JAVA400-L

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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