Hello,
I've done additional research on this topic, and it seems that the problem is
in the size of the response XML envelope.
When I am trying to print out the resulted OMElement:
result.serializeAndConsume(System.out);
Only first 4000 characters are printed and then following exception is thrown:
java.lang.RuntimeException: [was class java.io.IOException] Attempted read on
closed stream
Stange is that when the operation returns XML which length is less than 4000
characters everything works fine.
Also when I use this operation in async mode, everything is also fine, response
size irrespectively.
Do you know about this limitation?
Thanks in advance,
Vadim
-----Original Message-----
From: Lositski Vadim
Sent: Wednesday, December 12, 2007 5:19 PM
To: axis-user@ws.apache.org
Subject: [Axis2] Unable to deserialize OMElement
Hi everybody,
I am sending a request to the service which combines its response from various
sources, then creates an OMElement and sends it back. The databinding and
deserialization is made with Castor and Stax APIs basically as it is described
in the "databinding" example from Axis2 distribution.
When I am trying to create an object from an OMElement received from the service
StAXSource staxSource = new StAXSource(result.getXMLStreamReader());
Unmarshaller unmarshaller = new Unmarshaller(TargetClass.class);
UnmarshalHandler unmarshalHandler = unmarshaller.createHandler();
try {
ContentHandler contentHandler = (ContentHandler)
Unmarshaller.getContentHandler(unmarshalHandler);
TransformerFactory.newInstance().newTransformer().transform(staxSource, new
SAXResult(contentHandler));
}
catch (Exception ex) {
ex.printStackTrace();
}
TargetClass response = (TargetClass) unmarshalHandler.getObject();
I receive a NullPointerException exception:
java.lang.NullPointerException
at javanet.staxutils.StAXSource$1.parse(StAXSource.java:196)
at javanet.staxutils.StAXSource$1.parse(StAXSource.java:181)
at
org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:484)
at
com.profitsoftware.webservices.central.CentralWebServiceTester.main(CentralWebServiceTester.java:85)
The object is serialized, but partially some data fields are null
I have also tried to just print out the OMElement, but received:
Exception in thread "main" java.lang.StackOverflowError
at
org.apache.axiom.om.impl.llom.OMNodeImpl.setComplete(OMNodeImpl.java:174)
at
org.apache.axiom.om.impl.llom.OMNodeImpl.setComplete(OMNodeImpl.java:174)
at
org.apache.axiom.om.impl.llom.OMNodeImpl.setComplete(OMNodeImpl.java:174)
When I use OMElement.toStringWithConsume() I have the following exception:
java.lang.RuntimeException: [was class java.io.IOException] Attempted read on
closed stream.
at
com.ctc.wstx.util.ExceptionUtil.throwRuntimeException(ExceptionUtil.java:18)
at com.ctc.wstx.sr.StreamScanner.throwLazyError(StreamScanner.java:706)
at
com.ctc.wstx.sr.BasicStreamReader.safeFinishToken(BasicStreamReader.java:3655)
at com.ctc.wstx.sr.BasicStreamReader.getText(BasicStreamReader.java:809)
at
org.apache.axiom.om.impl.llom.OMStAXWrapper.getText(OMStAXWrapper.java:364)
at
org.apache.axiom.om.impl.serialize.StreamingOMSerializer.serializeText(StreamingOMSerializer.java:339)
at
org.apache.axiom.om.impl.serialize.StreamingOMSerializer.serializeNode(StreamingOMSerializer.java:79)
at
org.apache.axiom.om.impl.serialize.StreamingOMSerializer.serialize(StreamingOMSerializer.java:57)
at
org.apache.axiom.om.impl.util.OMSerializerUtil.serializeByPullStream(OMSerializerUtil.java:525)
at
org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:795)
at
org.apache.axiom.om.impl.llom.OMElementImpl.internalSerializeAndConsume(OMElementImpl.java:814)
at
org.apache.axiom.om.impl.llom.OMNodeImpl.serializeAndConsume(OMNodeImpl.java:358)
at
org.apache.axiom.om.impl.llom.OMElementImpl.toStringWithConsume(OMElementImpl.java:904)
at
com.profitsoftware.webservices.central.CentralWebServiceTester.main(CentralWebServiceTester.java:79)
Caused by: java.io.IOException: Attempted read on closed stream.
at
org.apache.commons.httpclient.AutoCloseInputStream.isReadAllowed(AutoCloseInputStream.java:165)
at
org.apache.commons.httpclient.AutoCloseInputStream.read(AutoCloseInputStream.java:106)
at java.io.FilterInputStream.read(FilterInputStream.java:111)
at java.io.PushbackInputStream.read(PushbackInputStream.java:161)
at java.io.FilterInputStream.read(FilterInputStream.java:90)
at com.ctc.wstx.io.UTF8Reader.loadMore(UTF8Reader.java:362)
at com.ctc.wstx.io.UTF8Reader.read(UTF8Reader.java:110)
at com.ctc.wstx.io.MergedReader.read(MergedReader.java:101)
at com.ctc.wstx.io.ReaderSource.readInto(ReaderSource.java:84)
at
com.ctc.wstx.io.BranchingReaderSource.readInto(BranchingReaderSource.java:57)
at com.ctc.wstx.sr.StreamScanner.loadMore(StreamScanner.java:967)
at
com.ctc.wstx.sr.BasicStreamReader.readTextSecondary(BasicStreamReader.java:4626)
at
com.ctc.wstx.sr.BasicStreamReader.readCoalescedText(BasicStreamReader.java:4124)
at
com.ctc.wstx.sr.BasicStreamReader.finishToken(BasicStreamReader.java:3699)
at
com.ctc.wstx.sr.BasicStreamReader.safeFinishToken(BasicStreamReader.java:3647)
What I have noticed is that when the size of response is 3980 bytes everything
is just fine, no exceptions, deserialization is also correct. But when the
response is 4606 bytes, it fails. Perhaps some buffer or cache issue?
Another interesting thing is that when I copy the response (which fails) from
SOAP monitor to the file, and the create an OMElement and print it out
everything is also fine:
StAXOMBuilder sab = new StAXOMBuilder("c:\\test.xml");
OMElement result = sab.getDocument().getOMDocumentElement();
System.out.println(result);
Please give me a hint how to solve this problem. I am using latest stable Axis2
version which is currently 1.3
Best regards,
Vadim
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