Debug batch programs

This blog will explain how to debug a background batch program with real background mode (SY-BATCH is X).

Questions that will be answered are:

  • How to debug a running job?
  • How to debug a completed job?

Starting the debug mode for batch job

First we plan a single run of the batch job. In our example we run program RSWAITSEC which does nothing more than wait.

In SM37 show the job run:

Select the job and in the command line enter the background debug command JDBG:

Now the debugger starts first in the batch job part. Hit F7 a few time (F7 = jump back out of routine) until you reach the real program:

As you can see here the SY-BATCH variable is X, which means you are debugging with real background mode on.

SM50 background debugging

If you want to debug a running job, you have to goto SM50 and select the background process. Then choose the menu option Administration / Program / Debugging. Confirm the prompt:

Wait until the running SQL statement has completed and debug mode will start.

Please be very careful with this kind of debugging in a productive system.If you cancel the debug session there might be a rollback work statement triggered, which can cause database inconsistencies.

Batch jobs tips & tricks

This blog will give tips and tricks on batch jobs.

Questions that will be answered are:

  • How to check a job is not running already before starting new one?
  • How to build in a wait step into a batch job?
  • How to set the RV variables automatically in table TVARVC?
  • How to validate that the basic batch job system is working ok?
  • How to analyze the jobs running in my system?
  • How to mass stop and start batch jobs?
  • How to set up batch job interception?
  • How to ignore large spool output of batch jobs?

Prevention of same job still running

If you want to prevent same job from starting, while a previous instance is still running, you need to add program RSBTONEJOB or RSBTONEJOB2 as first step in the batch job. This step will detect if the previous instance is still running and abort to avoid the next steps from being executed. More background in OSS note 557610.

Forcing a batch program to wait

If for some reason you need a batch program to wait between steps, you can use program RSWAITSEC as a step. This program will only do a wait for x amount of seconds.

Setting current date in the TVARVC table for the RV variables

The RV variables for current date, month and year are often used in month end closing batch jobs. Running program RVSETDAT will set the current dates for RV TVARC variables.

Checking basis background job system settings and working

If you want to validate if the background job system function itself is working properly, start transaction SM65 background processing analysis tool.

SM65 start screen

Result is shown correct working, number of batches and wait time:

SM65 result screen

Background job analysis tool

Start transaction ST13 and start tool BACKGROUND_JOB_ANALYSIS. Or directly start program /SSA/BTC.

Batch job analysis tool

Pending on your selection you get a graphical overview or a full list for you to speed up your analysis.

Mass stop and start of batch jobs

Stop and start batch jobs for maintenance

This blog explains how to mass stop and mass start batch jobs as admin. This especially usefull putting the SAP system in maintenance mode. Maintenance mode can be needed for upgrade, support package patching or data conversion.

Questions that will be answered are:

  • How to mass stop batch jobs?
  • Can I plan new jobs I need during the suspend mode?
  • How to mass start batch jobs again?

Stopping all batch jobs for maintenance mode

Stop all batch jobs: start transaction SE38 and start program BTCTRNS1.

BTCTRNS1 output

All currently planned jobs will be put into a Released/Suspendeded mode:

Batch jobs suspended mode

This means the already planned jobs (periodically or not) will not be started.

During this suspend mode new jobs can be planned by admin. These new jobs will be executed.

Starting all batch jobs after end of maintenance

Start all batch jobs again: start transaction SE38 and start program BTCTRNS2.

BTCTRNS2 output