Weblogic cluster context loading issue

[Graham Ewings <gr...@rulefinancial.com>]

Hi all,

We're experiencing problems running camel 2.12.3 on Weblogic 12c, jdk1.7_45_unlimited.

It is embedded in an existing, functional spring application deployed in an ear, that works fine until camel is introduced. 

The exception we see is identical to this one:

https://issues.apache.org/jira/browse/CAMEL-4893

The error occurs intermittently on startup and only when the ear is deployed to a cluster with two managed servers.  Sometimes it works on both servers, sometimes on one and sometimes on neither.

If deployed to a domain with a single server it works fine.

We found multiple JAXB versions in the ear and the Weblogic domain lib folder, jaxb-impl-2.1 with jax-api-2.0 along with jaxb-impl-2.6 so made everything jaxb-imp-2.6 and jaxb-api-2.2 but no change.   It also works on a single server with the former combination.

I appreciate this is probably going to be Weblogic classloading issue but I know we're not the first to deploy Camel with Weblogic so maybe someone has seen something similar?

Thanks in advance,

Graham
  

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Re: Weblogic cluster context loading issue

[GrahamEwings2 <gr...@ewingssoftware.com>]

Thanks Preben, this change to our ear deployment descriptor
(weblogic-application.xml) fixed it: 

    <wls:prefer-application-packages>
        ..........................
        ..........................
        <wls:package-name>com.sun.xml.*</wls:package-name>
    </wls:prefer-application-packages>

We did try something similar before but I suspect there was another problem
at the time or a just a typo.

P.S. replying from another account due to registration problems...




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Re: Weblogic cluster context loading issue

["Preben.Asmussen" <pr...@dr.dk>]

I havn't tried 2.12.3. We are still running on 11.3.5

We are running camel in war files and to control the classloading we set
prefer-web-inf-classes in the war deployment descriptor. 
Have you tried that on your ear deployment descriptor ?

To solve classloader issues in Weblogic you can also use wlscat app. see
also
https://www.youtube.com/watch?feature=player_detailpage&v=ArLTKapjV_8#t=306s

/Preben





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