Various scripts (eg checkpoint_method) are run with the shell specified by the user at least when running in posix_compliant mode. This can cause them to fail if the 'shell' doesn't implement a shell like -c option(eg perl). In addition the checkpoint script at least does not get killed when the job dies so a user could specify their program as the shell to bypass time(and possibly other) limits.

If a job is terminated (with ENABLE_ADDGRP_KILL=true )while it is being checkpointed the ckpt_command is not killed by grid engine. This can cause issues with some checkpointing tools (eg ompi-checkpoint command from openmpi when used with blcr) which don't terminate if you kill the processes it is trying to checkpoint. This isn't too hard to work around but should be documented.

Possibly one could delay termination of a job until after ckpt_command has finished running.

qstat -j prints sections

Jobs can not run because queue instance is not of type checkpointing

Jobs can not run because requested advance reservation is in error state

when none of the jobs listed have requested checkpointing or AR.