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From "Vladimir Ilmov (JIRA)" <axis-...@ws.apache.org>
Subject [jira] Commented: (AXIS-1903) IncompatibleClassChangeError when deploying Axis 1.2-RC3 on WebSphere 5.1 with PARENT_FIRST classloading
Date Tue, 07 Jun 2005 11:43:12 GMT
    [ http://issues.apache.org/jira/browse/AXIS-1903?page=comments#action_12312867 ] 

Vladimir Ilmov commented on AXIS-1903:
--------------------------------------

I have same exception in webLogic81 in axis 1.2 final release.

> IncompatibleClassChangeError when deploying Axis 1.2-RC3 on WebSphere 5.1 with PARENT_FIRST
classloading
> --------------------------------------------------------------------------------------------------------
>
>          Key: AXIS-1903
>          URL: http://issues.apache.org/jira/browse/AXIS-1903
>      Project: Axis
>         Type: Bug
>   Components: SAAJ
>     Versions: 1.2RC3
>  Environment: WebSphere 5.1.x on Linux (2.4.x kernel).
>     Reporter: David Tompkins

>
> I am deploying Axis 1.2RC3 in a war that resides within an ear. The axis jars are in
the war/WEB-INF/lib dir. For various reasons related to the other contents of my ear, I must
use PARENT_FIRST classloading. As many have reported, if you have PARENT_FIRST classloading
on WebSphere 5.1 with Axis 1.2RC3, then there is a conflict between the version of saaj (1.1)
that ships with WebSphere, and the version of saaj (1.2) that Axis 1.2RC3 expects, and you
get the following exception:
>  
> java.lang.IncompatibleClassChangeError: class org.apache.axis.SOAPPart does not implement
interface org.w3c.dom.Document
>  
> This issue can be resolved with PARENT_LAST classloading and a manifest which specifies
the classpath...but for those of use who can't use PARENT_LAST classloading, there is another
option.
>  
> It appears that a single source code change to Axis will eliminate the issue altogether.
The offending code is in org.apache.axis.message.MessageElement.addTextNode(), and can be
patched as follows:
>  
> OLD CODE:
>  
> public SOAPElement addTextNode(String s) throws SOAPException {
>     try {
>             Text text = getOwnerDocument().createTextNode(s);
>             ((org.apache.axis.message.Text)text).setParentElement(this);
>             return this;
>         } catch (ClassCastException e) {
>             throw new SOAPException(e);
>         }
> }
>  
> PATCHED CODE:
>  
> public SOAPElement addTextNode(String s) throws SOAPException {
>     try {
>             Text text = new org.apache.axis.message.Text(s);
>             this.appendChild(text);
>             return this;
>         } catch (ClassCastException e) {
>             throw new SOAPException(e);
> }
>  
> After making this change, Axis 1.2RC3 will run on WebSphere 5.1 with PARENT_FIRST classloading,
and no exceptions will be thrown.
>  
> -DT
>  
> ---------------------------------
> David Tompkins
> Sr. Computer Scientist
> Adobe Systems, Inc.
> tompkins _AT_ adobe _DOT_ com
> http://www.dt.org/

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