The top-level global resource serialization task from which all other tasks are anchored unexpectedly received control. The task is not able to recover.
The system enters a non-restartable X'0A3' wait state.
Take a stand-alone dump of the error and notify your system programmer.
Collect the dump and syslog associated with the failure and contact your IBM® support center.
Global resource serialization
Detecting Module
2,10
1