Principal Propagation Issue - J2EE_GUEST being used in some messages

Question

Hi guys !
        I have the following situation, my customer have a SAP PI 7.1 Ehp 1 and, some interfaces are configured to run under Principal Propagation.
        What is occurring is, for an interface that uses principal propagation and works correctly, the message enters in PI using an authenticated user for principal propagation(for example, USER0001) and this authentication is propagated until the receiver system(eg, SAP ECC), but in some cases, this same interface shows the following behavior: the authenticated user USER0001 send a message, the message starts to be processed in the PI pipeline propagating this user but, when the message will be delivered to RFC Adapter, we receive the following error:
Adapter Framework caught exception: failed to generate ClientPoolcom.sap.aii.adapter.rfc.RfcAdapterException: error initializing RfcClientPool:com.sap.aii.adapter.rfc.afcommunication.RfcAFWException: could not create JCO Pool com.sap.aii.adapter.rfc.afcommunication.RfcAFWException: could not get JCOProperties com.sap.security.core.server.destinations.api.DestinationException: [_DestinationServiceAuthorization1004] User-based destination service access denied to principal J2EE_GUEST. Assign the UME action Destination_Service_Write_Permission if the user should have the permission to save, update or remove destinations. The action is available already to the Administrator role.
      And after one message stop with the error above, any message of any interface using principal propagation starts to show the following error, that is only solved running a full cache refresh:
Delivering the message to the application using connection RFC_http://sap.com/xi/XI/System failed, due to: com.sap.engine.interfaces.messaging.api.exception.MessagingException: com.sap.aii.adapter.rfc.afcommunication.RfcAFWException: error while processing message to remote system:com.sap.aii.adapter.rfc.core.client.RfcClientException: could not get functiontemplate from repository: com.sap.mw.jco.JCO$Exception: (106) JCO_ERROR_RESOURCE: Repository pool 'RfcRepository[RfcClient[RFCReceiverAutoCommit_ECC]]f0264787314535c0a27cf29d108f5860' does not exist or was removed..
      The question is, why do PI pipeline is trying to use J2EE_GUEST in some task for an interface configured to use Principal Propagation ? Why this occurs in some cases and not in anothers(for the same interface) ? Why the cache is being lost ?? And of course, how can I solve this annoyng situation ?
      All configurations needed to run Principal Propagation was done according the help.sap.com documentation(http://help.sap.com/saphelp_nwpi711/helpdata/en/48/a9bbb97e28674be10000000a421937/content.htm), and as I said, it works in most cases. All messages are sent using SOAP Adapter for the Sender System, and RFC Adapter for the receiver, and there are synchronous and asynchronous interfaces. Basically the interfaces that only read data from SAP, does not use principal propagation and, the ones that create/update/delete data in SAP, uses principal propagation.
      Somebody already saw something like this ?
      Thank you in advance, and best regards,
      Wilson

Answer 1

Hi guys !
I have continued with some tests in environment trying to understand what
is happening and, I did the following, as the first error mentioned is
"User-based destination service
access denied to principal J2EE_GUEST. Assign the UME action
Destination_Service_Write_Permission if the user should have the
permission to save, update or remove destinations", I entered on UME Admin,
created a new Role named J2EE_GUEST_ROLE, assigned the UME Action
Destination_Service_Write_Permission to it, and assigned this new role to
the user J2EE_GUEST, and ran new tests.
After some executions, one message stopped with this error:
Adapter Framework caught exception: error while processing message to
remote system:com.sap.aii.adapter.rfc.core.client.RfcClientException:
could not get a client from JCO.Pool: com.sap.mw.jco.JCO$Exception: (101)
RFC_ERROR_PROGRAM: 'user' missing
I have observed that, in all messages that stops in error, we have the
following line in Audit Log:
Processing child message of multi-message with message Id
000c2936-6a89-1ed0-aebe-c262ae7d412e.
And this interface doesn´t have multi-message to be processed, is a
single message only.
I checked on configuration and see that the interface determinations for all interfaces has the flag "Maintain order at runtime", what is usefull basically when a Interface Determination has more than one interface,
what is not my case, so I will unmark this flag in all interfaces and run
new tests trying to identify if this solves the problem.
Any idea for this annoyng issue ?
Thank you and regards !