Issue with concurrent request set in R12

Hi,

We facing an issue with request set in R12.

Request set is tagged to two request.

Parent Request set

Child request 1

child request 2

Once the parent request started child request 1 and chid request 1 start child request 2.

Most of the time, child request 2 is completed in error. And the child request 1 and parent request is keeping on running. Child request 1 is waiting for the child request 2, and parent request is waiting for the child request 1.

Something is wrong with this request.

Once the child request 2 completes in error, child request 1 and parent request should complete either in error or warning. but this is not happening.