MIMES004I system hangs at IPL

Products

• MIM Resource Sharing (MIM)

Issue/Introduction

You are implementing MIM on a systems and at the first IPL, the system just hangs.

Potential symptoms:

The start-up of JES hangs with the messages:

MIMES004I JES2 waiting on SYSZJES2

MIMES004I JES2 waiting on SYSVTOC

*@HASP709 JES2 INITIALIZATION DELAYED - CHECKPOINT DATA SET RESERVE

Environment

Release : 12.5

Cause

The MIMES* messages are normal when CAMIMGR is started using the Early Start Mechanism. These messages indicate that the GRS exit has been planted and that an ENQ requestor is being suspended. 

The GRS exit starts CAMIMGR with SUB=MSTR so it can be started before JES2.

MIM is not completing synchronization...Until synchronization completes everything will essentially get stuck, which is what I suspect is happening with JES2.

Resolution

The recommendation is to determine why CAMIMGR did not synchronize - possible causes:

• CAMIMGR JCL PROC not found (must be named CAMIMGR)
• APF authorization issue
• Libraries not cataloged to Master Catalog
• Syntax Error
• The ADDLOG command might cause problems with Early Start Machanism  - see the warning documented in this section of the documentation:
  ADDLOG Command
• Perhaps CAMIMGR started but did not synchronize because it was waiting for an external system to join? In this case a FREE command may be needed
• Issue with the CTC addresses

 

Additional Information

Make sure all the other items related to Early Start Mechanism are satisfied.

Early Start can be bypassed by removing the entry from the PROGxx member, but then CAMIMGR will need to be started manually.