3234929 - Failing flow in FPN after engine JNDI security fix (NW 7.50 SP 25)

• After upgrading the system to NW 7.50 SP25 or higher, Enterprise Portal Federated Portal Network (FPN) stopped working
• FPN Remote Delta Link (RDL) scenarios stopped working
• When pasting remote content as local content via the Portal Content Management, the paste operation fails with the following error: “Could not create remote delta link to object '<PCD path>. Could not connect to the remote portal. The remote portal may be down, there may be a network problem, or your connection settings to the remote portal may be configured incorrectly”.
  
• When changing Remote Delta Link object on the consumer side, the changes fail to be synchronized on the producer side (where the content is eventually rendered). As a result, a “Portal runtime exception” happens:
   
  The following stack trace can be found in Producer side:
  

  FPN failed to lookup for remote object 'pcd:portal_content/…………' 
  [EXCEPTION]
  com.sap.portal.fpn.exception.unchecked.RemoteInfrastructureFailureException: Could not get to the remote side
  at com.sap.portal.fpn.remote.accessor.FPNRemoteAccessor.getRemoteInitialContext(FPNRemoteAccessor.java:244)
  at com.sap.portal.fpn.remote.accessor.FPNRemoteAccessor.init(FPNRemoteAccessor.java:125)

  ………

  Caused by: javax.naming.NamingException: Exception while trying to get InitialContext. [Root exception is java.lang.SecurityException: User 'Guest' is not authorized.]
  at com.sap.engine.services.jndi.InitialContextFactoryImpl.getInitialContext(InitialContextFactoryImpl.java:386)
  at com.sap.engine.system.naming.provider.DefaultInitialContext._getDefaultInitCtxt(DefaultInitialContext.java:64)
  at com.sap.engine.system.naming.provider.DefaultInitialContext.<init>(DefaultInitialContext.java:45)
  at com.sap.engine.system.naming.provider.DefaultInitialContextFactory.getInitialContext(DefaultInitialContextFactory.java:41)
  at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:684)
  at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:313)
  at javax.naming.InitialContext.init(InitialContext.java:244)
  at javax.naming.InitialContext.<init>(InitialContext.java:216)
  at com.sap.portal.fpn.remote.accessor.FPNRemoteAccessor.getRemoteInitialContext(FPNRemoteAccessor.java:199)
  ... 65 more
  Caused by: java.lang.SecurityException: User 'Guest' is not authorized.
  at com.sap.engine.interfaces.security.SecurityThreadContext.checkAuthorized(SecurityThreadContext.java:150)
  at com.sap.engine.interfaces.security.SecurityThreadContext.checkAuthorized(SecurityThreadContext.java:132)

  
  
  

• NetWeaver Application Server Java
• Enterprise Portal 

FPN upgrade stopped working not working broke update patch federated portal network producer consumer , KBA , EP-PIN-FPN , Federated Portal Network , Problem