RE: Unable to end the QP0ZSPWT job when shutting down Tomcat -- JAVA400-L

Thanks for this, Pierce.

I have only one copy of Tomcat installed on the system.

The web application is fully started with jars attached at the time the
'end' is submitted.

After ending, a NETSTAT *CNN indicates the Tomcat-associated ports are
indeed shutdown. The Tomcat log indicates that all Web Applications are
'removed'. So, I guess the issue is that the JVM is not shutting down due to
a programmatically spawned thread from the web application (and the still
open port is indeed the port associated with the spawned thread).

My programmatic thread is created as a daemon thread thus supposedly causing
the JVM to shutdown when all other non-daemon threads (in this case, Tomcat
threads) have died. To resolve this, I think I will need to program a shut
down of the spawned thread thereby shutting down the JVM. Either that or
discover some way of accurately identifying the QP0ZSPWT job that does not
involve creating and running in a new subsystem.

My sense now is that this is more of a Tomcat issue and so likely more
appropriate for a Tomcat forum.

Again, thanks for your help.

Chris Jewell



-----Original Message-----
From: java400-l-bounces@xxxxxxxxxxxx
[mailto:java400-l-bounces@xxxxxxxxxxxx]On Behalf Of
PierceJ@xxxxxxxxxxxxxxxx
Sent: Wednesday, October 26, 2005 8:45 AM
To: Java Programming on and around the iSeries / AS400
Subject: Re: Unable to end the QP0ZSPWT job when shutting down Tomcat


Sounds odd that the shutdown is not working.  The only time I have seen the
shutdown fail is when the shutdown script was picking up the wrong config
(like you have more than a single Tomcat on a system) and trying to do a
shutdown on the wrong port or you are trying to shutdown before the server
is completely up and accepting requests.  The second case typically happens
when you are starting Tomcat for the first time and the system is attaching
java programs to the  .jar files.

Can you tell what is going on from the tomcat logfiles?  When the shutdown
script runs, what does it say?  I typically pass the os400.stderr and
os400.stdout properties on the java calls to control where the logs are
created.





             "Christopher J.
             Jewell"
             <jewellcj@jewellc                                          To
             onsult.com>               <java400-l@xxxxxxxxxxxx>
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             @midrange.com                                         Subject
                                       Unable to end the QP0ZSPWT job when
                                       shutting down Tomcat
             10/25/2005 02:26
             PM


             Please respond to
             Java Programming
             on and around the
              iSeries / AS400
             <java400-l@midran
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Hopefully someone will be able to help with this issue:

I have installed Tomcat standalone (i.e. not using ASFTomcat) and am having
difficulty getting the spawned job QP0ZSPWT from ending when I end Tomcat.

The start up script (startcatalina400.sh) does something like this:
export -s QIBM_MULTI_THREADED=Y
export  -s JAVA_HOME=/QIBM/ProdData/Java400/jdk14
export  -s CATALINA_HOME=$1
export  -s CATALINA_BASE=$CATALINA_HOME
CP=$CATALINA_HOME/bin/bootstrap.jar:/qibm/ProdData/Java400/jdk14/lib/tools.j

ar:/qibm/ProdData/OS400/jt400/lib/jt400Native.jar
export   -s CLASSPATH=$CP
java -ms256m -Duser.dir="$CATALINA_BASE" -Dcatalina.base="$CATALINA_BASE"
-D
catalina.home="$CATALINA_HOME" org.apache.catalina.startup.Bootstrap start

This is executed using something like this in the CL:
CHGVAR &QSHCMD VALUE('cd' |< &TOMCATPATH |< ';bin/startcatalina400.sh' |>
&TOMCATPATH)
SBMJOB CMD(STRQSH CMD(&QSHCMD)) JOB(TOMCATJOB) JOBD(QSYSWRK)

When the web application runs, I get the following four jobs:
TOMCATJOB
QP0ZSPWP
QP0ZSPWT
QZSHSH

My 'stop' tomcat' script (endcatalina400.sh) does something like the
following:
export QIBM_MULTI_THREADED=Y
export -s CATALINA_HOME=$1
export -s CATALINA_BASE=$CATALINA_HOME
CP=$CATALINA_HOME/bin/bootstrap.jar
export -s CLASSPATH=$CP
java -ms64m -Dcatalina.base="$CATALINA_BASE"
-Dcatalina.home="$CATALINA_HOME
" org.apache.catalina.startup.Bootstrap stop

and this is executed as follows from the CL:
CHGVAR &QSHCMD VALUE('cd' |< &TOMCATPATH |< ';bin/stopcatalina400.sh' |>
&TOMCATPATH)
SBMJOB CMD(STRQSH CMD(&QSHCMD)) JOB(ENDTOMCATJOB) JOBD(QSYSWRK)


Right now, the 'stop script' is not stopping Tomcat. The above mentioned
four jobs continue to run.

If I end the submitted TOMCATJOB using ENDJOB, all jobs end except for
QP0ZSPWT which appears to be running the JVM for Tomcat. There seems to be
no way to be able to identify this job so that it can be ended from a
program with ENDJOB, (other than by creating your own subsystem and setting
this job as a prestart job in the subsystem and ending the entire
subsystem,
as suggested by the manual). (Unfortunately, the QP0ZSPWT job holds the
Tomcat ports open and so any subsequent submission will conflict.)

All thoughts appreciated.

Chris Jewell




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