What is the file descriptor error message?

I am seeing the following error in my node’s log file (“/var/log/citrusleaf.log”). What does it mean?

Oct 29 2013 19:25:29 GMT: CRITICAL GLOBAL (as): (base/as.c:174) Not enough file descriptors, Starting with 1024 and needs 2048

In order to increase the limit you will need root/sudo access. The limit should be set at 100,000. Please also see