title: Cannot increase "Max open files" for Wildfly while ulimit already changed to unlimit
body: <p>I'm working on Ubuntu 16.04 with wildfly. I got an error "Caused by: java.net.SocketException: Too many open files". So I changed the ulimit to ulimited for all users.</p>
  
  <pre><code>core file size          (blocks, -c) 0
  data seg size           (kbytes, -d) unlimited
  scheduling priority             (-e) 0
  file size               (blocks, -f) unlimited
  pending signals                 (-i) 128429
  max locked memory       (kbytes, -l) 16384
  max memory size         (kbytes, -m) unlimited
  open files                      (-n) 65535
  pipe size            (512 bytes, -p) 8
  POSIX message queues     (bytes, -q) 819200
  real-time priority              (-r) 0
  stack size              (kbytes, -s) 8192
  cpu time               (seconds, -t) unlimited
  max user processes              (-u) 65535
  virtual memory          (kbytes, -v) unlimited
  file locks                      (-x) unlimited
  </code></pre>
  
  <p>in /etc/security/limits.conf</p>
  
  <pre><code>* soft     nproc          65535
  * hard     nproc          65535
  * soft     nofile         65535
  * hard     nofile         65535
  root soft     nproc          65535
  root hard     nproc          65535
  root soft     nofile         65535
  root hard     nofile         65535
  </code></pre>
  
  <p>The problem is that another java process are got a new open files value(65535) except wildfly</p>
  
  <pre><code> cat /proc/1717/limits
  Limit                     Soft Limit           Hard Limit           Units
  Max cpu time              unlimited            unlimited            seconds
  Max file size             unlimited            unlimited            bytes
  Max data size             unlimited            unlimited            bytes
  Max stack size            8388608              unlimited            bytes
  Max core file size        0                    unlimited            bytes
  Max resident set          unlimited            unlimited            bytes
  Max processes             128429               128429               processes
  Max open files            4096                 4096                 files
  Max locked memory         16777216             16777216             bytes
  Max address space         unlimited            unlimited            bytes
  Max file locks            unlimited            unlimited            locks
  Max pending signals       128429               128429               signals
  Max msgqueue size         819200               819200               bytes
  Max nice priority         0                    0
  Max realtime priority     0                    0
  Max realtime timeout      unlimited            unlimited            us
  </code></pre>
  
  <p>I already restart the server. Please advise me how to fix this issue</p>