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When this happens, it will leave a lock file behind (e.g., /nfs/farm/g/glast/u41/L1/runs/697/r0697981861/r0697981861.lock) that you will need to delete before rolling the job back. Otherwise, the rollback will stay queued but not run.  If you do the rollback before removing the lock file you should bkill the job, wait for the reaper to terminate it, then remove the lock file, and do the rollback again.

MOOT Key Mismatch between on-board LAT and pipeline expectation