There were no crash reports. I assume the server cant write a crash report when it cant open more files.
java version "1.7.0_75"
OpenJDK Runtime Environment (rhel-2.5.4.0.el6_6-x86_64 u75-b13)
OpenJDK 64-Bit Server VM (build 24.75-b04, mixed mode)
forge-1.7.10-10.13.2.1277-universal.jar...