Getting 'Desktop Client port is in use' message while installing the Standby server for an High Availability Configuration

Document ID : KB000023687
Last Modified Date : 14/02/2018
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Issue/Problem/Symptoms: 

Getting 'Desktop Client port is in use' message while installing the Standby server for an High Availability Configuration.

Environment:  

Linux

Cause: 

This problem happens when you are installing the Standby server for an High Availability configuration on a Linux environment.

During installation, the CA (dSeries) Workload Automation installation program prompts you for the High Availability settings, required for the installation.

As part of the information required are the port numbers, used to listen to Desktop Client and default System Agent.

The installation program checks to verify if the port number you specify is in use or not.

The problem is either;

  1. The Desktop Client port you specify is in use, or

  2. The server could not resolve its own hostname

Resolution/Workaround:

If you check (using netstat or lsof command) and discover that the port is in use, then specify a port number not in use (Note: ports 1 - 1024 is dedicated to the operating system).

If the port is not in use by any process, and regardless of the Desktop Client port number you specify, the installation program always states that the Desktop Client port is in use, then the likely problem is with the server hostname.

What happens is that during installation, the installation program obtains the hostname of the server being installed on, at the beginning of the installation and later use the hostname to determine if certain ports are in use.

In order to verify, please check:

  1. If the server hostname could resolve itself;

    Issue the command 'hostname'

  2. If the server could ping itself;

    Issue the command 'ping <hostname>'

If the server was not able to resolve its own hostname, edit and add the entry to the /etc/hosts files. For example;

127.0.0.1  localhost 
10.311.200.90  <hostname>

Then, repeat (1) and (2) above, and re-try the installation.