[#EZB-286] blocking shutdown on Tomcat 6 - JIRA

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Key:	EZB-286
Type:	Bug
Status:	Resolved
Resolution:	Fixed
Priority:	Critical
Assignee:	Florent BENOIT
Reporter:	John. H. Smith
Votes:	0
Watchers:	0

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EasyBeans

blocking shutdown on Tomcat 6

Created: 18/Jul/08 01:34 PM Updated: 24/Jul/08 06:53 PM

Component/s:

Integration/Tomcat

Affects Version/s:

EasyBeans 1.0, EasyBeans 1.0.1

Fix Version/s:

EasyBeans 1.1.0 M1, EasyBeans 1.0.2

File Attachments:	1. tomcat-ezb-shutdown-bug.log (3 kb) 2. tomcat-ezb-shutdown-threaddump.log (16 kb)
Environment:	« Hide Tomcat 6.0.16, Java SE 1.6.0.6 System: Debian GNU/Linux "etch", kernel 2.6.24.6 on 32-bits x86 dual-core Show » Tomcat 6.0.16, Java SE 1.6.0.6 System: Debian GNU/Linux "etch", kernel 2.6.24.6 on 32-bits x86 dual-core

Description

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Deployed the freshly downloaded EasyBeans war file in a near-stock Tomcat distribution (only modified a few logging configuration).
Start the Tomcat with the war inside... some deployment messages are logged, no error message, all seems fine.
Try to shutdown the Tomcat: some shutdown messages are logged from easybeans and tomcat, without apparent error, but...
the shutdown doesn't end, and I have to manually kill the java server process.
I repeated the procedure several times to ensure it wasn't a first-launch problem, and it is not.
I first saw this on version 1.0.0, then tried the new 1.0.1 and it shows the same behaviour.

I am considering EasyBeans as a candidate container for development and production of J2EE 5 applications, but this is cleary a show-stopper for production systems. I only rank it "critical" because it could be used for development anyway, if this issue is eventually solved.

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Florent BENOIT - 18/Jul/08 02:03 PM

Hi, Could you provide a dump of the threads that are still running in your configuration ?

Maybe this is linked to http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4457683
but you've a JDK 6

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John. H. Smith - 19/Jul/08 02:02 PM

I can't tell about the maybe-linked bug... however I've only got _JRE_ 6 not JDK, but I think I'm allowed to do this with tomcat 5 and later.

I don't know what the "thread dump" thing means... Can you tell how to get it ?

I've checked the OS process list and listening ports:
- some threads remain,
- and there's a listening TCP port (but a different one at each launch).
(Attaching the log file)

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John. H. Smith - 19/Jul/08 02:03 PM

This is what I get after a simple startup-shutdown cycle.

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Florent BENOIT - 19/Jul/08 03:49 PM

Hi,

In order to get a thread dump, send a "kill -3" command on the process id of the java process.
This will show you a full dump of the JVM

Florent

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John. H. Smith - 19/Jul/08 04:52 PM

Ok here it is.

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Florent BENOIT - 23/Jul/08 09:28 AM

I'm now able to reproduce the problem. I will keep you informed

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Florent BENOIT - 24/Jul/08 05:49 PM

Fixed, you can do a try on snapshot from the stable branch :
http://maven.objectweb.org/maven2-snapshot/org/ow2/easybeans/ow2-easybeans-tomcat/1.0.2-SNAPSHOT/

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John. H. Smith - 24/Jul/08 06:53 PM

Yes, the snapshot works fine now. Super!
Now I've got to find configuration documentation...