All Concurrent Requests Go Into Pending with Status of Standby

 Issue - All Concurrent Requests Go Into Pending with Status of Standby

Solution - 

1. Log into Oracle Applications as SYSADMIN.
2. Select System Administrator responsibility.
3. Navigate to PROFILE --> SYSTEM.
4. Query for %CONC%ACTIVE%.
5. Change the profile option for Concurrent: Active Request Limit to Null (blank).
6. Exit Oracle Applications and log in again for the change to take affect.
7. Run a new concurrent request.

Reference - Doc ID 153111.1