3652877 - SAP NetWeaver failed to start due to: java.lang.NullPointerException: while trying to invoke the method java.lang.Object.hashCode() of a null object loaded from local variable 'key'

Following error is seen multiple times in the defaultTrace log: 

com.sap.ASJ.web.000500#BC-NWA-INC-UIF#sap.com/tc~lm~itsam~ui~mainframe~wd#sap.com/tc~lm~itsam~ui~mainframe~wd#com.sap.engine.services.servlets_jsp.
500 Internal Server Error is returned for HTTP request [http://hostname:<PORT>/webdynpro/resources/sap.com/tc~lm~itsam~ui~mainframe~wd/FloorPlanApp]:
  component [dispatcher],
  web module [webdynpro/resources/sap.com/tc~lm~itsam~ui~mainframe~wd],
  application [sap.com/tc~lm~itsam~ui~mainframe~wd],
  DC name [sap.com/tc~lm~itsam~ui~mainframe~wd],
  CSN component[BC-NWA-INC-UIF]

[EXCEPTION]
com.sap.tc.webdynpro.services.exceptions.WDRuntimeException: Exception was thrown in preprocessing phase of application session xyz. The causing exception is nested. RID=xyz
    ...
Caused by: com.sap.tc.webdynpro.services.exceptions.ApplicationFaultException: wdDoInit: exception thrown in this user coding area
   ...
Caused by: javax.ejb.EJBException: Cannot perform injection over bean instance xyz failed. Could not get a value to be injected from the factory.
...
Caused by: java.lang.RuntimeException: com.sap.engine.services.orpersistence.sqlmapper.generate.SQLMappingException: SQL Mapper Implementation null could not be loaded.
    ...
Caused by: com.sap.engine.services.orpersistence.sqlmapper.generate.SQLMappingException: SQL Mapper Implementation null could not be loaded.
    ...
Caused by: java.lang.NullPointerException: while trying to invoke the method java.lang.Object.hashCode() of a null object loaded from local variable 'key'

SAP NetWeaver Application Server Java

variable 'key', java.lang.Object.hashCode(), 500 Internal Server Error, Preprocessing phase of application , KBA , BC-JVM , SAP Java Virtual Machine , BC-JAS-COR , Enterprise Runtime, Core J2EE Framework , Problem