Out of memory exception while retrieving large file using CXF SOAP webservice

Hi,

I'm struggling to read a large file transmitted through a SOAP based web
service. The client code is failing with Out of memory exception. I'm using
MTOM to send the binary data, hoping that would be able to take care of
transmitting and reading large file. The file size in question is 750mb. I'm
using apache cxf. Here's the web services endpoint implementation.

@MTOM
@WebService(endpointInterface =
"com.test.contentservice.service.IContentService")
@BindingType(value=javax.xml.ws.soap.SOAPBinding.SOAP11HTTP_MTOM_BINDING)
public class ContentServiceImpl implements IContentService {

@Override
public ContentResponse getFile(ContentRequest req) {
ContentResponse res = new ContentResponse();
try {
File file = this.contentManager.getFile(req);
DataSource source = new FileDataSource(file);
DataHandler dataHandler = new DataHandler(source);
res.setFileData(dataHandler);
res.setFileName(file.getName());
} catch (Exception ex) {

return res;

I've turned on MTOM through spring , Spring entry :

<jaxws:endpoint id="contentService" implementor="#contentServiceImpl"
address="/contentservice">
<jaxws:dataBinding>
<bean class="org.apache.cxf.jaxb.JAXBDataBinding">
<property name="marshallerProperties">
<map>
<entry>
<key>
<value>jaxb.encoding</value>
</key>
<value>UTF-8</value>
</entry>
</map>
</property>
</bean>
</jaxws:dataBinding>
<jaxws:properties>
<entry key="mtom-enabled" value="true" />
</jaxws:properties>
</jaxws:endpoint>

The client code is generated using cxf wsdl2java tool. Here's a sample
client code

ContentResponse res = new ContentResponse();
try{
res = getRegisterPort().getFile(req);
DataHandler dataHandler = res.getFileData();
if(dataHandler!=null){
final InputStream in = dataHandler.getInputStream();
byte[] bytes = IOUtils.toByteArray(in);

}catch (Exception ex) {
LOGGER.error("Error in invoking getContent service",ex);

Here's the response object

@XmlAccessorType( XmlAccessType.FIELD )
public class ContentResponse extends ContentServiceResponseBase {

private String content;
private String source;
private String fileName;
@XmlMimeType("application/octet-stream")
private DataHandler fileData;
// Getter / Setter ...

Turned on mtom in client code :

final BindingProvider bpAdmin = (BindingProvider) port;
bpAdmin.getRequestContext().put(BindingProvider.ENDPOINT_ADDRESS_PROPERTY,
curlUrl);
SOAPBinding binding = (SOAPBinding)bpAdmin.getBinding();
binding.setMTOMEnabled(true);

jvm entry is as follows :

-Xms64m -Xmx6144m

And the exception :

Exception in thread "taskExecutor-12" java.lang.OutOfMemoryError: Java heap
space
at java.util.Arrays.copyOf(Arrays.java:2882)
at
java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100)
at
java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:515)
at java.lang.StringBuilder.append(StringBuilder.java:189)
at
com.sun.xml.internal.bind.v2.runtime.unmarshaller.StAXStreamConnector.handleCharacters(StAXStreamConnector.java:312)
at
com.sun.xml.internal.bind.v2.runtime.unmarshaller.StAXStreamConnector.bridge(StAXStreamConnector.java:176)
at
com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:349)
at
com.sun.xml.internal.bind.v2.runtime.BridgeImpl.unmarshal(BridgeImpl.java:109)
at com.sun.xml.internal.bind.api.Bridge.unmarshal(Bridge.java:222)
at
com.sun.xml.internal.ws.client.sei.ResponseBuilder$DocLit.readResponse(ResponseBuilder.java:514)
at
com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:110)
at
com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:78)
at
com.sun.xml.internal.ws.client.sei.SEIStub.invoke(SEIStub.java:107)
at $Proxy33.getFile(Unknown Source)

Not sure what I'm missing here, any pointer will be highly appreciated.

- Thanks