Cannot cancel active transfers with XCOM for z/VSE

Products

• XCOM Data Transport

Issue/Introduction

Several transfers are in a ACTIVE status and are not being canceled when the CANCEL command is issued. How can those transfers be canceled?

Environment

XCOM™ Data Transport® for z/VSE

Cause

Transfers are in a ATTACH-L state. The DISPLAY command will confirm the state.

Resolution

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.