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From Gianny Damour <>
Subject Re: Unable to deploy Tapestry app on Geronimo
Date Mon, 17 Apr 2006 04:34:36 GMT
Hi Bryan,

As a "simple" solution, you can start the jmxdebug console, config 
geronimo/jmxdebug-jetty/1.2-SNAPSHOT/car for Jetty, and observe the 
webClassPath attribute of the relevant WebModule (the contextroot of the 
jmxdebug console is debug-tool).

Also, could you please tell us what you exactly mean by?
12:54:13,609 DEBUG [RegistryBuilder] Processing module hivemind'.  That
is the 2nd time I see that, hence the got it loaded the 1st
time, and is now puking.

Based on your error, I think that you are stopping and starting the 
configuration; as the same CL is used across start and stop operations 
by the Web application context, this could be a problem. If this is the 
case, then I think that the fix is to create a new Web application 
context CL at each start-up. You can do this by adding this line at line 
403 of TomcatWebAppContext:

        this.webClassLoader = new TomcatClassLoader(urls, webAppRootURL, 
classLoader, contextPriorityClassLoader);

Could you please give it a shoot and report if it works better?


Bryan Noll wrote:

> I forgot to ask... to make sure I understand.... when you say "dump 
> the class loaders and URLs"... I assume you mean into a log, which 
> would mean editing code and re-building, correct?  Just wanted to make 
> sure I was the only one who didn't know how to do this via the admin 
> console or something before going about it this way.
> Thanks....
> Bryan
> Bryan Noll wrote:
>> Thanks for responding Aaron.  Strange to me as well.  I'm pretty sure 
>> its not getting on the classpath twice because there's two copies of 
>> a hivemind library somewhere in the server.  For instance...
>> 1) Download and extract G-mo... do a find . -name hive* in the 
>> G-MO_HOME dir... and get nothing...
>> 2) Start the server and deploy the simple Tapestry app (via the 
>> command line deployer).... see the aforementioned error...
>> 3) Now, do the 'find . -name hive*' again, and find the hivemind and 
>> hivemind-lib jar files in '/config-store/42' directory...
>> At any rate, thanks for responding...
>> Aaron Mulder wrote:
>>> Sounds like maybe the same JAR/dir is on the class path twice? 
>>> Strange that this should be a problem.  You might try dumping the
>>> class loaders and the URLs they contain and see if you can get a
>>> clearer picture of the overlap.
>>> Thanks,
>>>     Aaron
>>> On 4/16/06, Bryan Noll <> wrote:
>>>> Hello...
>>>> I'm having some issues deploying a simple Tapestry application to
>>>> Geronimo.  I'm trying to keep it as simple as I can... no
>>>> geronimo-web.xml.  So, Tapestry is tightly coupled with Hivemind, and
>>>> Hivemind is complaining... telling me "Module hivemind is 
>>>> duplicated!".
>>>> It would appear to me that this seems like a class loading issue with
>>>> Geronimo.  Evidently, the hivemind-1.1.jar library that's bundled 
>>>> in the
>>>> war is getting deployed twice.... or something like that.
>>>> To give you an brief idea of what's going on here, the Tapestry
>>>> bootstrap process is attempting to get all of these hivemodule.xml 
>>>> files
>>>> loaded by iterating over a Collection of them.  That is what's 
>>>> happening
>>>> every time 'RegistryInfrastructureConstructor.addModuleDescriptor' is
>>>> getting called.  So, right before I get the following stack strace, I
>>>> see some debug level logging coming out of the hivemind code saying
>>>> '12:54:13,609 DEBUG [RegistryBuilder] Processing module hivemind'.  
>>>> That
>>>> is the 2nd time I see that, hence the got it loaded 
>>>> the 1st
>>>> time, and is now puking.
>>>> Here's the stacktrace.  I'm gonna post to the Tapestry list as well 
>>>> and
>>>> see if they've got anything to say about it.
>>>> Thanks in advance for any thoughts....
>>>> org.apache.hivemind.ApplicationRuntimeException: Error: Module 
>>>> hivemind
>>>> is duplicated!  Definition in
>>>> jar:file:/C:/tools/geronimo-1.2-SNAPSHOT/config-store/42/war/WEB-INF/lib/hivemind-1.1.jar!/META-INF/hivemodule.xml

>>>> has been ignored in favor of existing definition from
>>>> jar:file:/C:/tools/geronimo-1.2-SNAPSHOT/config-store/42/war/WEB-INF/lib/hivemind-1.1.jar!/META-INF/hivemodule.xml.


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