Several transfers are in a ACTIVE status and are not being canceled when the CANCEL command is issued. How can those transfers be canceled?
XCOM™ Data Transport® for z/VSE
Transfers are in a ATTACH-L state. The DISPLAY command will confirm the state.
The DISPLAY command showed that all transfers in question were in a ATTACH-L state.
That indicates that XCOM is waiting for the remote system to send the header, but the Network I/O is not completing.
When the transfers are in this state the CANCEL or TERM commands will not help because XCOM has not control. In other words, it is stuck on a system call and not coming back to the XCOM code.
The only solution is to stop XCOM server, re-define the XCOMRRDS, start XCOM server.