Further to my above question, I checked into the weblogic managed server log file, and found the following detailed error:
java.lang.ExceptionInInitializerError
at com.hp.ws.business.session.WsSessionFactory.createWsSession(WsSessionFactory.java:22)
at com.hp.ws.web.TestServlet.doGet(TestServlet.java:35)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
Truncated. see log file for complete stacktrace
Caused By: java.lang.NullPointerException
at org.jboss.aop.Domain$1.run(Domain.java:124)
at org.jboss.aop.Domain$1.run(Domain.java:119)
at org.jboss.aop.Domain.getDomainName(Domain.java:119)
at com.hp.ws.business.session.WsSession$WsSessionAdvisor.initialise(WsSession$WsSessionAdvisor.java)
at com.hp.ws.business.session.WsSession$WsSessionAdvisor.<init>(WsSession$WsSessionAdvisor.java)
Truncated. see log file for complete stacktrace
>
<Mar 9, 2012 3:41:11 PM PST> <Error> <Cluster> <BEA-000110> <Multicast socket receive error: java.io.StreamCorruptedException: invalid type code: 11
java.io.StreamCorruptedException: invalid type code: 11
at java.io.ObjectInputStream$BlockDataInputStream.readBlockHeader(ObjectInputStream.java:2463)
at java.io.ObjectInputStream$BlockDataInputStream.refill(ObjectInputStream.java:2498)
at java.io.ObjectInputStream$BlockDataInputStream.read(ObjectInputStream.java:2570)
at java.io.DataInputStream.readInt(DataInputStream.java:370)
at java.io.ObjectInputStream$BlockDataInputStream.readInt(ObjectInputStream.java:2775)
Truncated. see log file for complete stacktrace