Revert "Fix hang up issue in IOManager epoll"
Revert "Fix hang up issue in IOManager epoll"

This reverts commit 8e89c06499eaabe1ee7e04add0b40cbf625f8410.

mtanski/mordor,mtanski/mordor,ccutrer/mordor,adfin/mordor,adfin/mordor,adfin/mordor,mtanski/mordor,ccutrer/mordor,ccutrer/mordor