ducc_ling only switches the default group

[Erdem Ozcan <er...@nuance.com>]

Hi everyone,

I discovered today that ducc_ling is taking only the default group of the 
submitter user to switch the group of the process to be launched. I 
discovered this by chance because a new user, whose group definition is not 
in the same order as the others, tried to launch some tasks on Ducc. Besides 
being a restriction which is difficult to discover, this would also limit the 
the number of groups that we can use to protect our resources to only one.

I am not an expert in systems programming, but I found on the web that it is 
also possible to get and assign a list of groups (getgrouplist/setgroups) to 
a process.
 
I was wondering if there is any particular reason for not assigning the whole 
list of groups of the submitter user to the process in ducc_ling? If not, can 
we expect this feature to be implemented soon?

Thanks in advance for your feedback!

Erdem Ozcan