Multi-Node Environment Tasks failure or Incorrect data

Driver Issue:
Symptom:
One central node everything works perfect(Engine)
Some times tasks fails(If task ran from Rim Node)

Validation:
Check the task log
See at what point failure happened(You need check data pulling is problem, Engine processing is the problem or Storing the data is the problem)

Sample: data pulling the problem here.
2018-06-12 00:33:11 0035 Master:
2018-06-12 00:33:11 0036 LIB CONNECT TO 'ctsales-unicode (qlik_qadmin)'
2018-06-12 00:33:11      Error: Connection 'ctsales-unicode (qlik_qadmin)' not found
2018-06-12 00:33:11      Execution Failed

Fix:

 ODBC drivers issues (By installing on each node) Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified Execution Failed Execution finished.

Data Issue:
Explained: How Data connections needs to used in multi node environment.

Your ODBC connections should be same in all the Engine nodes

Your QVD lib connections needed to be shared path accessible from the account used from all the engine nodes.

Displayed same in our VCloud App for sample scenario