Camunda Optimize cannot be started. Port already in used - spring

Question

As I'm trying to exploit the Camunda Enterprise version, now I'm stuck at the Optimize server. I'm not able to start the Optimize server followed by instruction. Here is the log file
16:59:37.322 [main] DEBUG o.e.j.u.component.AbstractLifeCycle - starting ServerConnector#48974e45{HTTP/1.1,[http/1.1]}{0.0.0.0:8095}
16:59:37.325 [main] WARN o.e.j.u.component.AbstractLifeCycle - FAILED ServerConnector#48974e45{HTTP/1.1,[http/1.1]}{0.0.0.0:8095}: java.io.IOException: Failed to bind to /0.0.0.0:8095
java.io.IOException: Failed to bind to /0.0.0.0:8095
at org.eclipse.jetty.server.ServerConnector.openAcceptChannel(ServerConnector.java:346)
at org.eclipse.jetty.server.ServerConnector.open(ServerConnector.java:307)
at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:80)
at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:231)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
at org.eclipse.jetty.server.Server.doStart(Server.java:385)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:72)
at org.camunda.optimize.jetty.EmbeddedCamundaOptimize.startOptimize(EmbeddedCamundaOptimize.java:169)
at org.camunda.optimize.Main.main(Main.java:17)
Caused by: java.net.BindException: Address already in use: bind
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:433)
at sun.nio.ch.Net.bind(Net.java:425)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
at org.eclipse.jetty.server.ServerConnector.openAcceptChannel(ServerConnector.java:342)
... 8 common frames omitted
I know it is obvious but I tried to changing different port. It's still showing the same error, no matter which port I choose. Please help to take a look.

Answer 1

The port is already in use, the message is obvious. All you can do is to kill the process that is listening to this thread.
I use Windows, but you can search for Linux way to do, the principle is the same.
Windows:
Find a process that uses the port 8095 using netstat -aon | find "8095". The result looks like:
TCP 0.0.0.0:8003 0.0.0.0:0 LISTENING 23332
TCP [::]:8003 [::]:0 LISTENING 23332
Find in the Task Manager in the Details tab what runs under the PID (process ID) number 23332.
End such a task. It will be probably java.exe since there is a pending process listening to the port. Restart the IDE and everything should work well. If it is ex. a database or anything else, you have to use a different port than 8095 either at your side or the application that already uses it.
Linux: https://unix.stackexchange.com/questions/140482/kill-any-service-running-at-a-specific-port