Issue while accessing two web-dynpro application, ESS/MSS and Payroll

Hi All,
We are facing one Critical Server Issue in our systems. Following is the scenerio:-
Our Portal system was having one Application known as German Payroll application. Before last two week one more application of ESS/MSS i.e. Time Management has been deployed to our system.
Now the user has two application with two different roles in the portal.
When user try to navigate from Time Management Application to German Payroll application or German Payroll Application to Time Management Application then they are facing Critical Server Error issue.
But once the user try to refresh using CTRL+F5 then the problem got resolved.
========================================================================
German Payroll applications back end server details:P95.
Time Management Application back end server details: P23
Steps to reproduce the issue:
1-login to portalgot to Employee self service tab-wait for 3-5mins
& than navigate to german payroll applications----& faced crtical
server errors:
Log from deafult trace:-
=======================================================
1.#0021280FECEE0028000000A400005A4B0004A2FA644F345C#1305096215265#com.sap.tc.webdynpro.progmodel.generation.DelegatingComponent#sap.com/tcwddispwda#com.sap.tc.webdyn
pro.progmodel.generation.DelegatingComponent#km048893#2758##n/a##fa2a61757b9911e08e660021280fecee#SAPEngine_Application_Thread[impl:3]
_9##0#0#Fatal#1#/Applications/Xss#
Java###null
[EXCEPTION]
#1#com.sap.tc.webdynpro.modelimpl.dynamicrfc.WDDynamicRFCExecuteException
at
com.sap.tc.webdynpro.modelimpl.dynamicrfc.DynamicRFCModelClassExecutable.execute(DynamicRFCModelClassExecutable.java:107)
at com.sap.xss.ser.xssmenu.fc.ModelHandler.onInit
(ModelHandler.java:205)
at com.sap.xss.ser.xssmenu.fc.wdp.InternalModelHandler.onInit
(InternalModelHandler.java:428)
at com.sap.xss.ser.xssmenu.fc.FcXssMenu.setPersonnelNumber
(FcXssMenu.java:570)
at com.sap.xss.ser.xssmenu.fc.FcXssMenu.onInit
(FcXssMenu.java:292)
at com.sap.xss.ser.xssmenu.fc.wdp.InternalFcXssMenu.onInit
(InternalFcXssMenu.java:455)
at com.sap.xss.ser.xssmenu.fc.FcXssMenuInterface.onInit
(FcXssMenuInterface.java:165)
System 'P95' is not possible because RFC Metadata was retrieved using
System 'P23'. Please assure you have configured the RFC Connections
properly. A Server restart may
be necessary!#
==============================================================
here is the catch....When user is trying to navigate from ESS tab(using
custom jcos for Backend system P23) to German payroll(backend system
P95) after 3 mins ---getting crtical error...Still its using the
data/metadat jcos connection information of ESS applications from
cache...that you can see in default trace.
PS: Standards Jcos are configured for P23 systems:
====================================================
SAP_R3_HumanResources----created with P23
SAP_R3_HumanResources_MetaData----been created with P23
SAP_R3_SelfServiceGenerics----been created with P23
SAP_R3_SelfServiceGenerics_MetaData----been created with P23
=====================================================
P95----Germman payroll
P23---ESS/MSS
Name of Cutsomn Jcos created for bakcend P95 i.e. german payroll
A-P95
=======================================================
SAP_R3_HumanResources:D95
SAP_R3_HumanResources_MetaData:D95
SAP_R3_SelfServiceGenerics:D95
SAP_R3_SelfServiceGenerics_MetaData:D95 configured with sap-wd-arfc-
useSys.
Name of cutom jcos created for backend ESS/MSS P23
B-P23
=========================================================
SAP_R3_HumanResources_MetaData:X23
SAP_R3_HumanResources:X23
SAP_R3_SelfServiceGenerics:X23
SAP_R3_SelfServiceGenerics_MetaData:X23 configured with sap-wd-arfc-
useSys.
========================================================
Jcos parameter of P23 backend:
JCo Pool Configuration
Maximum Pool Size: 50
Maximum Connections: 100
Connection Timeout (msec.): 10000
Maximum Waiting Time (msec.): 30000
Jcos parameter of P95 backend:
JCo Pool Configuration :
Maximum Pool Size: 5
Maximum Connections: 10
Connection Timeout (msec.): 10000
Maximum Waiting Time (msec.): 30000
===================================================================
After more analyzing the situation we found that one web dynrpo component i.e. pcui_gp~xssutils is common to both the application and it is configured to standard JCO i.e.
SAP_R3_HumanResources
SAP_R3_HumanResources_MetaData
SAP_R3_SelfServiceGenerics
SAP_R3_SelfServiceGenerics_MetaData
My thinking is that this component is giving us the problem.
Please provide your comments and solution to rectify this issue.
Also, let me know in case you need more information.
Thanks in Advance
Kuldeep Verma

Hi
First try a very simple application with nothing in it just one text saying Hello World
Run it and see what happens.
Also check if your url uses FQDN name. something like https:
company.name.co:50000\.......
If you do not use the FQDN it will always show a script error on the bottom and some functions will not work e.g
dropdowns.
regards
Yuval.

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