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I have a Springboot application and want to change the default port, I am using the kotlin language.

I have deployed it on a server and there it works fine, but when unning locally I get this stack trace:

org.apache.catalina.LifecycleException: Failed to start component [Connector[HTTP/1.1-9093]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167) ~[tomcat-embed-core-8.5.34.jar:8.5.34]

Plus the following warning message:

Description:

The Tomcat connector configured to listen on port 9093 failed to start. The port may already be in use or the connector may be misconfigured.

Action:

Verify the connector's configuration, identify and stop any process that's listening on port 9093, or configure this application to listen on another port.

I have changed the port by my application.properties file: 

server.port = 9093

There is an explicit reason that I have chosen for port 9093, because that is the only port I have acces to on the companies development server, I don't want to change the ports all the time when switching from running locallyand running in the cloud. The default port 8080 works fine.

So my questions is: How to change the default port in Springboot when running locally?

Jayson Minard
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SparklyUnicorn
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    It appears that the port is changing correctly but that you have some other service already running on port `9093` locally. – Mark Nov 19 '18 at 09:57
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    Just override it when launching the application `java -jar --server.port=8080`. However even better will be to create environment specific configurations and use a profile to switch/select the right one. – M. Deinum Nov 19 '18 at 10:03
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    I actually saw it right now, I was running one instance from my IDE and another on command line. But forgot it was there, so that was the problem. – SparklyUnicorn Nov 19 '18 at 10:04
  • @M.Deinum Thanks for your comment, that is an actual usefull command I was not aware off. +1 – SparklyUnicorn Nov 19 '18 at 10:06
  • Does this answer your question? [Spring Boot: Change Port for Web Application](https://stackoverflow.com/questions/30219255/spring-boot-change-port-for-web-application) – miken32 Jul 25 '22 at 23:24

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