Too many opening files when change http connect to NIO

For client's requirement, we need add websocket feature in Maitai(base on BPMS 6.1.2).
following steps
1 change http connect to NIO
Old :<connector name="http" protocol="HTTP/1.1" scheme="http" socket-binding="http" max-post-size="40971520" />
New:<connector name="http" protocol="org.apache.coyote.http11.Http11NioProtocol" max-post-size="40971520" scheme="http" socket-binding="http"/>
2 restart jboss eap and running server in half day

Expected Results：
The server work wall.

Actual Results:
User can not log on the server and jboss stop response.
we check jboss log , cann't find any error.
we find a lot of "can't identify protocol" using " lsof -p 1005 |grep socket"