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From Florian Müller <f...@apache.org>
Subject Re: NoClassDefFoundError using non-Woodstox StAX implementation with OpenCMIS 0.12.0 on WebSphere 8.5
Date Thu, 08 Jan 2015 16:33:53 GMT
Hi Andy,

I've changed the code a bit to handle that case (without catching an 
Error!).
But you really should consider using Woodstox. We have seen bugs, 
security and performance issues with other StAX implementations.


- Florian


> Hi,
> 
> We have an application which uses OpenCMIS and was developed for
> WebLogic application servers, but can also run on WebSphere
> application servers.
> 
> The simplest way to get it to run on WebSphere included the removal of
> the stax2-api.jar file, and the configuration of the application
> server to use IBM's StAX implementation instead of Woodstox.
> 
> This worked OK using OpenCMIS 0.10.0, but with 0.12.0 we get
> NoClassDefFoundError trying to load the Woodstox class, which is not
> in the classpath as we want to use a different StAX implementation.
> 
> The problem arises in
> org.apache.chemistry.opencmis.commons.impl.XMLUtils:
> 
>  TRY {
> 
>  // Woodstox is the only supported and tested StAX implementation
> 
>  factory = NEW WstxInputFactory();
> 
>  } CATCH (Exception e) {
> 
>  // other StAX implementations may work, too
> 
>  factory = XMLInputFactory._newInstance_();
> 
> which would probably work OK if we got an Exception from the class
> loader, but we get a java.lang.NoClassDefFoundError, which is a
> Throwable, not an Exception, so it isn't handled correctly.
> 
> We do not have any urgent need to upgrade to version 0.12.0, so we can
> continue to use version 0.10.0 or 0.11.0 for the next release of our
> application, but it would be helpful if the code could be changed in a
> future release of OpenCMIS to handle Throwable errors in the same way
> as Exceptions.
> 
> Many thanks,
> 
> Andy
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