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  1. ,

    Its saying that a Java application is trying to connect on port but that port is already being used by some other process and JVM Bind to that particular port is failed.

  2. ,
    via Stack Overflow by Coffee

    Check which program is running on the given port.

    Windows: netstat -a -b -n (Use Resource Monitor if you are admin) Linux: lsof -i:<port>

    Kill the process.

    Windows taskkill -pid <process-id> /f Linux kill -9 <process-id>

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, 1 year ago Address already in use Address already in use: bind	at Method)	at Source)	at Source)	at Source)	at Source)	at org.xnio.nio.NioXnioWorker.createTcpConnectionServer(	at org.xnio.XnioWorker.createStreamConnectionServer(	at io.undertow.Undertow.start(	at org.springframework.boot.context.embedded.undertow.UndertowEmbeddedServletContainer.start(	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.startEmbeddedServletContainer(	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(	at	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(	at org.springframework.boot.SpringApplication.refresh(	at org.springframework.boot.SpringApplication.createAndRefreshContext(	at	at	at	at	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at	at org.springframework.boot.loader.Launcher.launch(	at org.springframework.boot.loader.Launcher.launch(	at org.springframework.boot.loader.JarLauncher.main(