z/OS Agent processing File Transfers crash with U02000102 and U02000143 errors

Document ID : KB000085045
Last Modified Date : 14/04/2018
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Error Message :
U02000143 General GSS error: 'gss_acquire_cred() rc=458752(1004)'.
“U02000102 Error when calling the function 'getpwnam', error code '157(EDC5157I An internal error has occurred.)'.”
(After canceling the filetransfer)

When performing a File Transfer on a z/OS Agent the agent crashes and the JOBF is stuck with a KEYSTORE error similar to this:

Can't open //'HLQ.LIB.KEYSTORE'

While other File Transfers on the same Agent and Host process without error.

OS Version: N/A
Cause type:
Root Cause: File transfer fails in the initiation phase, while accessing the keystore dataset. As more transfers run on the same agent, a user switch may occur in a running transfer thread, right before the main agent thread tries to access the keystore.
Update to a fix version listed below or a newer version if available.

Fix Status: Released

Fix Version(s):
Component(s): Agent MVS

Automation Engine 12.1.0 - Available
Automation Engine 12.0.2 - Available
Automation Engine 11.2.5 - Available
Additional Information:
Workaround :
Use File Transfer (FT) option FT_THREAD_LEVEL_SECURITY=YES to allow each transfer to run under the FT login user context

This will prevent concurrent effective user switches in the Agent process.