z/OS JES2 Initialization and Tuning Guide
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Specifying a back-up JES2 cataloged procedure

z/OS JES2 Initialization and Tuning Guide
SA32-0991-00

IBM® suggests that you define a back-up JES2 cataloged procedure. If JES2 fails to start because of either a JCL or an allocation error, you can use this member to start JES2 while you resolve the errors with the original procedure.

You must build a member in one of the data sets defined by the IEFPDSI statement in the MSTRJCLxx. In the example below, the data set SYS1.PROCLIB contains the JCL found for the JESBACK member.

Enter the following command to start this procedure:
START JESBACK,JOBNAME=JES2,SUB=MSTR
where JESBACK is an installation-defined name for the member of SYS1.PROCLIB that contains the backup JES2 procedure.
Figure 1. The 'JESBACK' Back-up Procedure
//IEFPROC      EXEC PGM=HASJES20,TIME=1440,PARM=(WARM,NOREQ)
//HASPPARM     DD UNIT=3390,DSN=SYS1.SECOND,DISP=SHR
//PROC00       DD DSN=SYS1.PROCLIB,DISP=SHR

When you have corrected the error in the original procedure, you can restart it by entering a $P JES2,ABEND operator command to bring down the JES2 member. Then restart the JES2 member through the MVS™ START command (S JES2) when you have replaced the back-up procedure with the original JES2 procedure.

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