PQ50136: WHEN JAVAX.EJB.EJBEXCEPTION WAS NEWED AND THROWN FROM AN EJB, CORBA UNKNOWN WITH UNCHECKEDEXCEPTION WAS RETURNED TO CLIENT

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APAR status
Closed as program error.

Error description
When javax.ejb.EJBException was newed and thrown in an EJB,
CORBA UNKNOWN GIOP REPLY with
RMI:com.ibm.ejs.container.UncheckedException was sent back to
the client. The client should never see an UncheckedException
from the server.
Local fix Problem summary
****************************************************************
* USERS AFFECTED: All users of WebSphere Application Server    *
*                 V4.0 for z/OS and OS/390.                    *
****************************************************************
* PROBLEM DESCRIPTION: J2EE Clients recieving                  *
*                      com.ibm.ejs.container.Unchecked         *
*                      Exception back from method              *
*                      invocations when expecting documented   *
*                      exceptions. UncheckedExceptions are     *
*                      internal to the container and should    *
*                      not be surfaced back to the client.     *
*                                                              *
*                      ClassCastException can be received when *
*                      marshalling a remote reference within   *
*                      the same server from ejb container to   *
*                      servlet running in the IRT. This shell  *
*                      java client version of this works fine. *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
In order to return the correct exception back to the calling
client process, the container must ensure that the correct
exceptions are being raised and that those exceptions are
mapped correctly to conform to the rmi-iiop exception rules
specified in the rmi-iiop specification. The container
was raising EJSException's as opposed to RemoteException's
throughout its runtime code base. The container utilizes
an exception, UncheckedException, to track internal
container runtime errors. These exceptions should not
surface on the client side, but were doing so.
There are a handful of exceptions as defined by the
rmi-iiop 2.1 specification which must be intercepted and
translated into a format compatable for transfer back to the
client. These exceptions were not being intercepted correctly,
and therefore were not being translated for return to the
client. All other exceptions raised during the course of a
method invocation should arrive back at the client as a
RemoteException. This was not happening due to a lack of
an exception mapping facility.

The check in com/ibm/ws390/rmi/corba/Util.java, in the
copyObject method, needs to be rearranged so that CORBA Objects
are not routed to the JDK ORBs implementation of copyObject.
The problem is that the instance of Remote check is True for
Stubs, which causes us to assume that the passed object is
a wrapper. When we cast to the wrapper, we get a classcast
exception because the object is really a stub not a wrapper.
Problem conclusion
The container was changed to throw RemoteExceptions and to map
all exceptions raised during the bean lifecyle into a form
transmissible across the rmi-iiop boundry.

In copyObject and copyObjects(Util.java) there is now check for
an EJSWrapper instead of a remote object and return a Stub.

APAR PQ50136 is associated with SERVICE LEVEL W400025 of
WebSphere Application Server V4.0 for z/OS and OS/390.
Temporary fix Comments
APAR information
APAR number PQ50136
Reported component name WASKBASE
Reported component ID 5655A9801
Reported release 400
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Submitted date 2001-06-29
Closed date 2001-07-31
Last modified date 2001-09-05

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:
UQ56395

Modules/Macros
BBOUBINF BBOZ0229 BBOZ0812 BBOZ0813    

Fix information
Fixed component name WASKBASE
Fixed component ID 5655A9801

Applicable component levels
R400 PSY UQ56395    UP01/08/08 P F108

  Fix is available
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Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server for z/OS
Operating system(s):
Software version: 400
Software edition:
Reference #: PQ50136
IBM Group: Software Group
Modified date: Sep 5, 2001