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In this blog I am going to share how to resolve the issue in a simplest way.
Before going into the problem just learn about what is port number.
A port number is used to identify the specified process. A port number is an endpoint for the communication. In TCP/IP and UDP networks, a port is an endpoint to a logical connection and the way a client program specifies a specific server program on a computer in a network. … Some ports have numbers that are pre-assigned to them by the IANA, and these are called the “well-known ports” which are specified in RFC 1700.
By using simple steps we are going to change the Tomcat server port number and solve the issue.
Step1:
In the IDE work space go to server tab and double click on it.

Step 2:
Choose HTTP/1.1 in the port name and number box appears in the work space.
Remove the old port number and give new port number.

Step 3 :
Save the file and start the server.
