Any of the sending or receiving device driver tasks can hang, requiring a recycle of the connection. There are several actions you can take to recycle a connection, listed below in the order of their power. However, as the power of each action increases, so does the possibility that requests will be lost.

1. The preferred way to recycle a connection is to use the TARGET command to make the connection dormant and then operative. However, this method will fail if a task is hung waiting for outstanding work. To restart the connection with node NEWYORK, enter:

   prefixTARGET NODE(NEWYORK) DORMANT
   prefixTARGET NODE(NEWYORK) OPERATIVE

2. If the TARGET command fails to fix the problem, use the RACF® RESTART command to restart the connection with the node. The RESTART command restarts a connection even if a task is hung. To restart the connection with node NEWYORK, enter:

   prefixRESTART CONNECTION NODE(NEWYORK)

3. If that fails, use the RACF RESTART command to restart the connection task. Enter:

   prefixRESTART CONNECTION

4. As a last resort, stop and restart the RACF subsystem address space, using the RACF STOP and MVS™ START commands:

   prefixSTOP
   START subsystem_name,SUB=MSTR