Re: Unable to resolve package=javax.management)(version>=1.0.1)(!(version>=2.0.0)

[karafman <mv...@comcast.net>]

Don, 



javax.management is provided by the API. However, it is exported as version 0.0.0.  For this reason, com.springsource.org.apache.activemq.web  can't wire to it because it is looking for a version between 1.0.1 and 2.0.0. 



Most bundles in Karaf don't specify the version number for api provided packages. This is to allow everyone to upgrade the version of Java used by Karaf without having to rewrite and redistribute all the application bundles.  



Here is what is happening inside Karaf.  When karaf sees an import with no version number, it automatically starts looking for that package, starting at 0.0.0 and incrementing up until it finds a package with a version number.  It appears from the error that com.springsource.org.apache.activemq.web is looking for a version of javax.management between versions 1.0.1 and 2.0.0.  This tells me that it is expecting to see a javax.management package other than that provided by the API. 



To verify that your version of Karaf doesn't have this version of javax.management inside it already, you can grep the exports for javax.management like this: 



exports | grep javax.management 



Once you've done this and proven that you don't already have that version of javax.management installed, there are a couple of things you can do to fix this error.  First, if you're using a provisioning file (will likely end with features.xml), search in that file for a bundle that would contain javax.management and make sure it is using the correct version number.  Failing that, if you are installing the set of bundles manually, I would go to the spring forums and ask them what package they are using for com.springsource.org.apache.activemq.web.  They've probably got something wrapped up that has the proper version number. 



As an absolute last resort (meaning don't do this unless you really have to), you may want to "hack" the /etc/jre.properties file and next to the javax.management entry for the version of Java you are using type ;version="1.0.1".  This last statement is absolutely not the best way to handle the issue and should only be used as a last resort. I'm sure there will be some posts STRONGLY suggesting you not do this. 



v/r, 



Karafman 


----- Original Message ----- 
From: "DonDiego761 [via Karaf]" <ml...@n3.nabble.com> 
To: "karafman" <mv...@comcast.net> 
Sent: Tuesday, January 4, 2011 12:08:27 PM 
Subject: Unable to resolve package=javax.management)(version>=1.0.1)(!(version>=2.0.0) 

Hi, 

In Karaf 2.1.2, I installed the bundle Apache ActiveMQ Web Connector for REST API and Streamlets support (5.3.0). When I start it, I get the following error: 
Error executing command: Unresolved constraint in bundle com.springsource.org.ap 
ache.activemq.web [353]: Unable to resolve 353.0: missing requirement [353.0] pa 
ckage; (&(package=javax.management)(version>=1.0.1)(!(version>=2.0.0))) 

But I didn't find the bundle which contents the package "javax.management". 

I hope I was clear. 

Regards, 





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Karafman
Slayer of the JEE
Pounder of the Perl Programmer

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