[Condor-users] input file locking?

["David A. Kotz" <dkotz@xxxxxxxxxxxxx>]

When Condor opens an input file for a job, does it lock that file?  I 
have a user who is submitting hundreds of jobs, all of which refer to a 
directory (NFS mounted) of text files with one number in each.  At any 
given time, there may be several jobs using the same input file.  Some 
of the jobs using a given input file run to completion with no problems 
while others repeatedly fail to run with errors like the following in 
the shadow log:

11/10 15:10:27 (3744.186) (9335):error: Error: Couldn't open standard 
file 'inputs/in.186'

I've checked the system logs to make sure we aren't having intermittent 
automounter issues or any other system failings.  The jobs that fail to 
run keep failing to run, returning to the idle state over and over, even 
after all of the running jobs have completed.