...
In v5.8+ you can unschedule a job to stop it. If the job is hung on a network call (e.g. a database lock), you cannot stop it, but if it is processing data it will stop shortly. You can do a few jstacks on the daemon process to see if it is making progress.
See this document to have a unix service which controls the loader
...
For Grouper v2.5+ see this page on Daemon configuration.
For Grouper Daemon configuration options, see the Daemon section of the Grouper API page.
For info on pruning Daemon logs, see Ongoing Maintenance Tasks