When EMS is started on Windows, it creates dynamic ports on the loopback address (i.e [::1] for Ipv6).

For example, EMS 8.3 on Windows 7:

======
netstat -ano | grep 22476

  TCP    x.x.x.x:7222     0.0.0.0:0              LISTENING       22476
  TCP    [::1]:7222             [::]:0                 LISTENING       22476
  TCP    [::1]:53015            [::1]:53016            ESTABLISHED     22476
  TCP    [::1]:53016            [::1]:53015            ESTABLISHED     22476
  TCP    [::1]:53017            [::1]:53018            ESTABLISHED     22476
  TCP    [::1]:53018            [::1]:53017            ESTABLISHED     22476
  TCP    [::1]:53019            [::1]:53020            ESTABLISHED     22476
  TCP    [::1]:53020            [::1]:53019            ESTABLISHED     22476
=======

If the above connections can not be created, the EMS server will not start and logs the exception, "FATAL: Unable to start Network IO Thread(s).  Error: 67 File descriptor limit".
 

Windows

1). Check the dynamic ports range on Windows 7 by using the commands below:

netsh int ipv4 show dynamicport tcp
netsh int ipv6 show dynamicport tcp

Run "netstat -ano" to check the number of dynamic ports being used on the host.

Increase the range of dynamic ports if needed.

2).  Run the Java sample attached (Filename: TCPServer.java) to check if the connection can be made to the loopback address.

java TCPServer <host_name>

Sample output:

=====
java TCPServer server_host

hostA/10.108.64.139
Inet6Address: false

hostA/0:0:0:0:0:0:0:1
Inet6Address: true
loopback: 0:0:0:0:0:0:0:1

49212
connected to server
client connected
=====

Run the command below to confirm if the connection on the loopback address is created:

===
netstat -ano | findstr 49212
  TCP    [::1]:49212            [::1]:49215            ESTABLISHED     5896
  TCP    [::1]:49215            [::1]:49212            ESTABLISHED     5896
===

If the connection fails to be created, it indicates that there is a configuration issue of the loopback address (i.e on Ipv6 [::1]) on the host. Consult your System Administrator or Microsoft Support.

 

EMS server can not be started and logs the following exception: "FATAL: Unable to start Network IO Thread(s). Error: 67 File descriptor limit".

SR 01245415