Bugs item #840496, was opened at 2003-11-11 23:15
Message generated for change (Comment added) made by dward2
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Category: JBossWeb
Group: v3.0 Rabbit Hole
Status: Open
Resolution: None
Priority: 5
Submitted By: David Ward (dward2)
Assigned to: Scott M Stark (starksm)
Summary: Cocoon war dir hot-redeploy causes JBoss Shutdown
Initial Comment:
I've discovered a problem that only happens with jboss
3.0 + tomcat + cocoon 2.0 + expanded war directory,
relating to hot-redeploy. Basically, if you have a
cocoon.war/ *directory* web application, and touch it's
web.xml file, JBoss shuts down! Here are the steps to
re-create:
1) Download a completely fresh
jboss-3.0.7_tomcat-4.1.24 from sourceforge.
2) Download a completely fresh cocoon-2.0.4 (vm14) from
apache.
3) Dropped cocoon.war in jboss' deploy directory.
4) Started up jboss.
5) Hit the cocoon servlet (got a sitemap error but
didn't care)
6) "touch" cocoon.war.
7) NO REDEPLOY PROBLEM
8) Hit the cocoon servlet (got same sitemap error but
still didn't care - at least could still hit it).
9) Stop jboss.
10) Delete the db, tmp and log dirs to be completely
clean distro again.
11) Explode the cocoon.war file into cocoon.war/
*DIRECTORY INSTEAD*.
12) Start up jboss.
13) Hit the cocoon servlet (sitemap error; still don't
care)
14) "touch" cocoon.war/WEB-INF/web.xml
15) *** REDEPLOY PROBLEM: jboss shuts down!!!!!! ***
JBoss/Jetty does not do this. JBoss 3.2.x does not do
this. A JBoss/Tomcat webapp without Cocoon does not do
this. JBoss/Tomcat with a Cocoon war *file* does not
do this. It has to be JBoss 3.0/Tomcat with a Cocoon
2.0 war *directory*, and you touch it's web.xml file to
cause a redeploy. I have tested it on many different
combinations, and here is the breakdown:
1) jboss-3.0.7_tomcat-4.1.24 + cocoon-2.0.4 - FAILED
2) jboss-3.0.8_tomcat-4.1.24 + cocoon-2.0.4 - FAILED
3) jboss-3.0.8_tomcat-4.1.27 + cocoon-2.0.4 - FAILED
4) jboss-3.0.8_tomcat-4.1.29 + cocoon-2.0.4 - FAILED
5) jboss-3.2.2 (tomcat_4.1.27) + cocoon-2.0.4 - PASSED
6) jboss-3.0.8_tomcat-4.1.24 + cocoon-2.1.2 - PASSED,
though 500 errors
Something was fixed in JBoss 3.2.2 / Tomcat that fixed
this problem. Does anyone have any idea what this was?
Unfortunately, we cannot upgrade to JBoss 3.2.2 right
now. If the fix is known, can it be backported back to
3.0? A jboss-3.0.9_tomcat-4.1.29 with the backported
fix would be awesome and greatly appreciated!
BTW, with JBoss 3.2.2, it looks like the shutdown was
intercepted; here's a line from the console:
22:43:58,980 INFO [STDOUT] Mon Nov 03 22:43:58 EST
2003 SHUTDOWN : System.exit() was not called
When I see that line with 3.2.2, the redeploy finishes
and JBoss does not shutdown. Maybe find where that log
is done and see what can be similarly done in 3.0.x to
intercept the shutdown?
Last bit of info: This is using Sun JDK 1.4.1 and
1.4.2. It is recreateable on Windows; not sure about
Linux and MacOSX.
Thanks!
David
----------------------------------------------------------------------
>Comment By: David Ward (dward2)
Date: 2003-11-29 13:19
Message:
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Hi again Scott,
I am now running the same jboss/java/os version as described
in my last comment (where I referenced server.log), except I
launched it from Ecplipse 2.1.1 using JBoss-IDE 1.2.2. I
set a breakpoint in java.lang.System.exit(int) as you
suggested, halting the VM when it reached the only line in
that method, Runtime.getRuntime().exit(int). On the Debug
view tab, I see this:
Thread [Thread-29] (Suspended (breakpoint at line 715 in
System))
System.exit(int) line: 715
ServerConnection.run() line: 146
I'm assuming "ServerConnection.run() line: 146" is JBoss
source, as Eclipse can't find the source. Does this help
you debug the problem? Is it enough, or should I download
the jboss source for the version I'm using and get a more
detailed trace?
Thanks yet again,
David
----------------------------------------------------------------------
Comment By: David Ward (dward2)
Date: 2003-11-29 12:22
Message:
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Hi Scott,
I will try that next. I do have more helpful information,
though. Using the "jboss-3.0.8_tomcat-4.1.24 +
cocoon-2.0.4" configuration on WinXP-Pro with Sun JDK
1.4.2_02, I changed cocoon.war/WEB-INF/web.xml to use the
sevlet 2.3 spec instead of 2.2. I could then add a custom
TestServletContextListener with the listener-class element.
I put a printStackTrace() in the contextDestroyed method.
When I touch web.xml, I see it (contextDestroyed) being
called twice. The first time was triggered by
AbstractDeploymentScanner$ScannerTrhead.run() - which I
would expect because I "touch"ed web.xml. However the
second time is the one I didn't want to happen, and that was
triggered by ServerImpl$ShutdownHook.run(). I am attaching
a server.log file. Search for the text "contextDestroyed
called" to find the 2 stack traces. Again, the first is
expected, the second shouldn't have happened.
Thanks again,
David
----------------------------------------------------------------------
Comment By: Scott M Stark (starksm)
Date: 2003-11-12 19:13
Message:
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user_id=175228
Put the server in a debugger and set a break point on the
System.exit call and show the stack trace to see who is
calling it.
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