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Date: Fri, 24 Jan 2003 01:07:44 +0100
From: Stephen McConnell <mcconnell@apache.org>
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To: Avalon Developers List <avalon-dev@jakarta.apache.org>
Subject: Re: Excalibur/Cornerstone/James woes
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Peter M. Goldstein wrote:

>Stephen,
>
>  
>
>>Then ...
>>
>>$ cd <avalon-dir>
>>$ ant
>>    
>>
>
>Done.
>
>  
>
>>$ cd <excalibur-dir>
>>$ ant
>>    
>>
>
>Done.
>
>  
>
>>$ cd <cornerstone-dir>
>>$ ant -buildfile cornerstone.xml
>>    
>>
>
>Done.
>

Note - I have just updated the corenerstone.xml buildfile (in CVS - now 
references excalibur-pool-1.2.jar).

>
>  
>
>>$ cd <james-dir>
>>$ ant -buildfile james.xml
>>    
>>
>
>Done.  Although I needed to make an interesting change here.  Specifically,
>I needed to change the import statement:
>
>import org.apache.avalon.cornerstone.services.datasource.DataSourceSelector;
>
>to
>
>import
>org.apache.avalon.cornerstone.services.datasources.DataSourceSelector;
>
>I suspect this is a packaging issue with the cornerstone-datasource-1.0.jar,
>since the former appears to still be present in source control.
>  
>

Sorry about that - I've updated the james.xml build file to include a 
patch target to replace all occureses of "*.service.datasource." with 
"*.service.datasources." - this reflects a datasource package that uses 
the ServiceSelector as opposed to CompoentSelector.  You will need to do 
the update on all your sources in James the reference service.datasource 
(including the James.xinfo file).

>  
>
>>$ cd <avalon-sandbox>
>>$ cd merlin
>>$ ant
>>    
>>
>
>Done.  Found a bug in the config (it uses the old
>File_Persistent_Stream_Repository, File_Persistent_Object_Repository).
>Fixed it.
>

Thanks - fixed.

>>// edit the blocks.xml file to make sure the james block is enabled
>>// and that the demos are disabled then launch merlin
>>
>>$
>>$ start demo
>>    
>>
>
>And here we have a problem.  When I type "start demo" I get:
>
>C:\development\apache-cvs\avalon-sandbox\merlin>java -classpath
>build\lib\avalon
>-merlin-bootstrap-2.1.jar org.apache.avalon.merlin.bootstrap.Merlin
>merlin.prope
>rties
>[INFO   ] (sys): initialization from:
>C:\development\apache-cvs\avalon-sandbox\m
>erlin on localhost
>[INFO   ] (sys):
>
>commencing block construction phase
>
>[INFO   ] (sys): block count = 3
>[INFO   ] (sys): [james/14780827]
>[INFO   ] (sys): [playground/17905186]
>[INFO   ] (sys): [demo/16316379]
>[INFO   ] (sys):
>
>commencing structural assembly phase
>
>[ERROR  ] (sys): Message: Unable to deploy block: [james/14780827] due to a
>structural assembly failure.
>===================================================================
>
>Exception: org.apache.avalon.assembly.lifecycle.AssemblyException
>Assembly failure attributable to embedded appliance.
>
>Cause: org.apache.avalon.assembly.lifecycle.AssemblyException
>Unable to deploy a supplier for a service dependency:
>[org.apache.james.services
>.MailStore] org.apache.james.services.MailStore:1.0.0
>
>Cause: org.apache.avalon.assembly.appliance.ApplianceException
>Unresolvable assembly graph for appliance: [mailstore/29086271]
>

Two things here:

   1. the exception handling in Merlin had a bug in that it was not 
passing the causal exception and as such the error report is not so 
helpful.  This is now fixed and some of the related error message have 
been brushed up.

   2. my guess is that you didn't update xinfo files contianing 
references to the *.service.datasource" to the ...s package name.  This 
would cause the assembly stage exception (which would a lot clearer 
based on the updates in Merlin I've just mentioned)

>[INFO   ] (sys):
>
>commencing decommissioning phase
>
>[INFO   ] (sys):
>
>commencing termination phase
>
>java.lang.NullPointerException
>

That should not have happen - have made some changes in Merlin - but 
anyway its not central to the James deployment question.

>>$ cd <james-dir>
>>$ cd tests
>>$ ant -buildfile test.xml
>>$
>>    
>>
>
>And obviously I don't get here.
>
>I find the problem difficult to debug because I know absolutely nothing
>about Merlin.  It happens both before and after I make the changes to the
>configuration file, so it's not due to the changes I cite above.  Any help
>in debugging this would be appreciated.  Thanks.
>

I confident the issue is inconsitentcy in the packkage names for the 
"...service.datasources".  Also the updates on Merlin should make things 
clearer what is happening.  IIf you want to see what is happening inside 
Merlin - go into the kernel.xml file and look for the fololowing 
categories defintion and set it to DEBUG instead of INFO (and you will 
get a lot more information about what is or is not happening).

   <categories>
      <category name="/sys" priority="INFO"/>
   </categories>

>
>Now, onto Phoenix.  I've built a sar file out of the latest and greatest
>files, and am having issues deploying it in Phoenix 4.0.3.
>
>When I try and use the excalibur-thread-1.1 in this version of Phoenix,
>nothing works.  This is kind of what I expected from Peter D.'s earlier
>comments, so I wasn't surprised.
>  
>

I didn't have any problems (build against excalibur thread 1., replaced 
Phoenix thread jar with 1.1 and everything worked OK).

>Then I tried something different - I reverted the DefaultThreadManager
>change (side note, this change is wrong - the constructor arguments should
>be minThreads,maxThreads not maxThreads,maxThreads) and reverted the
>cornerstone dependencies to excalibur-thread-1.0.jar .
>
>However when I tried to deploy these individual Cornerstone jar files, I got
>an error on starting up Phoenix that referred to 7 missing extensions.
>  
>

Yep - there seems to be a problem in Phoenix concerning extension 
handling. I've already committed updated to the cornerstone build 
procedure to disable the extension depedency declarations.  It seems 
that Phoenix is not considering the jar files that are loaded from the 
sar lib as extension candidates.  Anyway - with the current 
corenerstone.xml based build - you will not have this problem.

>Finally, I deployed with a single cornerstone.jar built off the current
>Cornerstone sources with the aforementioned revert.  This worked fine.  My
>Phoenix deployment passed basic tests, including the EndToEnd test.   So my
>current code appears to work fine, and there isn't a single
>Component/ComponentManager to be found anywhere in it.
>
>Based on these tests it seems that:
>
>i) We need a version of Phoenix that runs with the Excalibur-thread-1.1.jar,
>but that is reasonably stable (4.0.4?)
>

I agree - but my hunch is that there will be a few other updates for 
4.0.4 relating to getting the Excalibur releases done (e.g. pool 1.2, 
configuration 1.0, etc.).

>ii) The DefaultThreadManager patch needs to be fixed
>

It is fixed - not following you here.

>iii) Someone needs to give me some advice on Merlin :)  
>

Switch on DEBUG for the "/sys" category and what you will see will 
explain a lot.
Secodly - once we have something running I'll talking a lot more about 
packaging and deploying a james block - basically a deployment unit that 
hides all of the assembly and config and structures it as a single 
component.  That will introduce questions about what services are 
exposed, and a lot of stuff about mailet registration and so on.  This 
is only the starting point .. :-).

>Or take my code base
>and figure out what needs to be done to make it run in Merlin.
>

I think its a good idea - can you email it to me?

>iv) The dependency issues for the individual Cornerstone jar files needs to
>be clarified.
>

My position on this is that we should be using the standard extension 
mechanisms - but I'm going to have to dig into Phoienix to gfigure out 
what is broken.  Once that it resolved - getting jar depedencies 
documetation can be done formally in the manifest.

>
>Thoughts?
>  
>

Lots - but in another email :-)

Cheers, Steve.

>--Peter 
>
>
>
>
>--
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>
>
>
>  
>

-- 

Stephen J. McConnell
mailto:mcconnell@apache.org
http://www.osm.net




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