Problems with "Crashing" and "Overloading" 

 

·        If the first LUW in an outbound queue cannot be processed because of a communication problem, this not only blocks the queue, but also blocks all the other LUWs that are dependent on this queue. The qRFC tables grow, and the subsequent “traffic jam” can lead to database problems. As soon as the communication problem is solved, all LUWs, and therefore all dependent queues are automatically processed in sequence (automatically using destination configuration in  SM59, or manually using SMQ1 or by using ABAP programs, which use standardized qRFC function modules for queue management).

 

·        A backlog of this type can occur if a system or application exception occurs while the first LUW in the queue is being executed in the target system. If this happens, there is no automatic restart. The system administrator or application administrator must solve the problem before the queue can be restarted.