After upgrading to Control-M Application Integrator 9.0.21.100,  job are stuck in an executing state and many log files in the proclog folder of the Control-M/Agent are created.

Under the <Control-M/Agent for UNIX and Microsoft Windows Home Directory>/proclog folder, lots of log files are generated, the format of log filename is AI_SYSOUT_ONSTMT_<ORDER ID>_<RUNCNT>_<TIME STAMP>.log.   The number of files could be up to thousands. 

This indicates the job stuck with executing has On/Do Statement which could not be processed properly. 

Alternate Solution prior to version 9.0.21.200:
Step 1: Navigate to <Control-M/Agent Home Directory>/data/
Step 2: Backup AI.dat, and then edit the file by adding line below.

CM_OUTPUT_FILENAME_TEMPLATE *DEFAULT

The change will take effect automatically.

This only happens when the Control-M Application Integrator job uses an On/Do Statement and when Control-M Application Integrator is upgraded to 9.0.21.100 from an earlier version.
It does not happen for a new installation of Control-M Application Integrator.

Tracking Information:
CTM-8544 has been created for this issue and is implemented in version 9.0.21.200