1889161 - UMT fails with a timeout during receive and Corba connect errors while retrieving users and objects

• Migrating from a large BOE XI3.1 x environment to BI4.0 (latest patch level) Environment using the Upgrade management tool ( UMT ).
• Running into timeout issues while trying to do perform incremental or complete migration
• On BI4 UMT server, the RAM has been increased to 24 GB and UMT is run with 20GB Heap setting
• All available UMT Timeout settings from existing KBASES 1835179, 1804414, 1817916 have already been applied
• All 3rd Authentication providers (LDAP, AD etc) have been disabled at XI3.1 source system within the CMC
• UMT fails with a "Timeout during receive" error and other CORBA Timeout errors noticed within the logs which start after 10-15 minutes of execution.

• The UMT logs indicate errors similar to entries below :
  
  ..CORBA.TRANSIENT: attempt to establish connection failed: java.net.ConnectException: Connection refused: connect OR
  
  ..CORBA.BAD_PARAM: other: no scheme found OR
  
  hostname=<cmshost>,svr=<cms server>:<cms port>,port=<cms port> java.net.ConnectException: Connection refused: connect

SAP BusinessObjects BI Platform 4.0 [ BI4.0]
SAP BusinessObjects Enterprise XI3.1 [ BOE XI3.1 ]

migrate upgrade BI4 XI3 4.0 3.1 40 31 timeout error failure crash hang move , KBA , BI-BIP-UMT , Upgrade management tool , Problem