If you are using CXF, you can control the client timeout by programmatically obtaining the HTTPConduit from the proxy and setting the ConnectionTimeout and ReceiveTimeout properties.
For example:
import org.apache.cxf.frontend.ClientProxy;
import org.apache.cxf.transport.http.HTTPConduit;
import org.apache.cxf.transports.http.configuration.HTTPClientPolicy;
import com.primavera.ws.p6.job.JobPortType;
//...
JobPortType port = testCase.getJobServicePort();
org.apache.cxf.endpoint.Client client = ClientProxy.getClient(port);
HTTPConduit httpConduit = (HTTPConduit)client.getConduit();
HTTPClientPolicy policy = httpConduit.getClient();
// set time to wait for response in milliseconds. zero means unlimited
policy.setReceiveTimeout(0);
Or, you can control the client timeout by modifying the spring configuration for the client http-conduit file.
Please refer to the CXF User's Guide for information about using the http-conduit file to control the client timeout. At the time of this writing, the CXF User's Guide was available at http://cwiki.apache.org/CXF20DOC.