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From "James Scott (JIRA)" <j...@apache.org>
Subject [jira] Commented: (AXIS2-795) Returning a MTOM message causes IOException (closed stream)
Date Thu, 24 Aug 2006 06:50:04 GMT
    [ http://issues.apache.org/jira/browse/AXIS2-795?page=comments#action_12430145 ] 
            
James Scott commented on AXIS2-795:
-----------------------------------

Had a very similar issue with a non-data-binding client (generated by wsdl2java) using a very
simple service (return type was a single element of type String). Once the response grew long
enough that the server would send it in two or more chunks, the client would throw the "Attempted
read on closed stream" exception. The debug output made it look as though the client never
pulled the second chunk.

Generating an ADB-style client from the same WSDL did not produce this error.

> Returning a MTOM message causes IOException (closed stream)
> -----------------------------------------------------------
>
>                 Key: AXIS2-795
>                 URL: http://issues.apache.org/jira/browse/AXIS2-795
>             Project: Apache Axis 2.0 (Axis2)
>          Issue Type: Bug
>          Components: databinding
>    Affects Versions: 1.0
>         Environment: JDK 1.4.2_06
>            Reporter: Wolfram Kaiser
>         Assigned To: Ajith Harshana Ranabahu
>
> When accessing an attachment sent via MTOM on the client side I get the following exception:
> org.apache.axiom.om.OMException: javax.mail.MessagingException: Error in input stream;
nested exception is:
>     java.io.IOException: Attempted read on closed stream.
>     at org.apache.axiom.attachments.Attachments.getPart(Attachments.java:462)
>     at org.apache.axiom.attachments.Attachments.getNextPart(Attachments.java:359)
>     at org.apache.axiom.attachments.Attachments.getPart(Attachments.java:324)
>     at org.apache.axiom.attachments.Attachments.getDataHandler(Attachments.java:274)
>     at org.apache.axiom.om.impl.mtom.MTOMStAXSOAPModelBuilder.getDataHandler(MTOMStAXSOAPModelBuilder.java:151)
>     at org.apache.axiom.om.impl.llom.OMTextImpl.getDataHandler(OMTextImpl.java:341)
> The client stub was generated using the default / no data binding (-> direct Axiom
access). I believe the error is in the generated stub:
> public org.apache.axiom.om.OMElement echoPdf(org.apache.axiom.om.OMElement param48) throws
java.rmi.RemoteException {
> ...
>     _messageContext.getTransportOut().getSender().cleanup(_messageContext);
>     return (org.apache.axiom.om.OMElement) object;
> }
> The cleanup() seems to close the InputStream for the PDF/attachment while the attachment
has not been loaded in Axiom. Thus, when accessing the attachment in the OMElement returned
by MyStub.echoPdf() the aforementioned exception is thrown. I would argue that the pull mechanism
of Axiom fails in cases where the associated InputStream has been closed while the generated
stub has done its processing already.
> The following simple - but rather ugly - work-around seems to solve the problem:
> public org.apache.axiom.om.OMElement echoPdf(org.apache.axiom.om.OMElement param48) throws
java.rmi.RemoteException {
> ...
>     org.apache.axiom.om.OMElement omElement = (org.apache.axiom.om.OMElement) object;
>     // retrieving the content of a OMTextNode will load the associated data so it can
be accessed
>     // even after the InputStream from this web service call has been closed.
>     omElement.getText();  // or omElement.toString();
>    _messageContext.getTransportOut().getSender().cleanup(_messageContext);
>    return omElement;
> The getText()/toString() has the effect that all binary data from the web service call
is loaded in the Axiom objects so they can be accessed in the client code which uses the MyStub.echoPdf()
method.

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