3314360 - Logon failed. Error: null. Web Service call failed. Fault returned to client: null - SAP Data Services

• Webadmin.log error:
  [  SEVERE ] Logon failed.  Error: null
  [  SEVERE ] Web Service call failed. Fault returned to client: null 
• Error in server event log and Third party scheduler- Exception thrown when trying to communicate with Job Server:<host:port>. Socket Closed.
• Job server receives the socket closed error then resumes the job successfully in Data Services Management Console.
• The third party scheduler only receives the first error and marks the job as failed.
• Random job fails in third party scheduler but shows successful in Management Console.

• SAP Data Services 4.x.
• Third Party Scheduler.

socket, closed, web service, Get_BatchJob_Status, Logon, Logout, Ping, Run_Batch_Job, failed, logon, third party scheduler, DSMC, DS, null, fault, failing, API , KBA , EIM-DS-SVR , Administration/Server , EIM-DS-DEP , Deployment, Installation, Upgrade , Problem