Tomcat won't start - how to check that port 8080 is not in use

Question

Tomcat won't start, and it has worked perfectly before. I suspect something else is running on port 8080. I am running Windows Vista. How do I check that nothing else is using port 8080?

I have recently downloaded several versions of Jetty. Could this be the problem? I am not running them concurrently so I can't see how.

Does this answer your question? [How do I see if a port is in use on a windows machine?](https://serverfault.com/questions/2699/how-do-i-see-if-a-port-is-in-use-on-a-windows-machine) — Michael Freidgeim, Mar 18 '21 at 02:29

score 18 · Accepted Answer · edited May 02 '14 at 12:40

18

Open up a command prompt and run

netstat -ano | findstr 8080

Rightmost column is PID

In task manager you can add column for PID then find the app that is using the port.

edited May 02 '14 at 12:40

Jim Ford

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answered Jul 21 '09 at 16:42

dexedrine

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use | findstr 8080 or | findstr LISTENING to filter the netstat output – radius Jul 21 '09 at 16:48

score 1 · Answer 2 · answered Jul 21 '09 at 16:41

1

I think you can run cmd as administrator and use netstat command to see if port 8080 is being used. Use netstat /? for help with netstat command. I do not know any GUI based approach for the same.

answered Jul 21 '09 at 16:41

Saurabh Barjatiya

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score 1 · Answer 3 · answered Jul 22 '09 at 00:06

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In addition to netstat you can also use Process Hacker or ActivePorts to view open ports in real-time (ok, specific refresh intervals...)

answered Jul 22 '09 at 00:06

squillman

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score 0 · Answer 4 · edited Dec 04 '12 at 00:18

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Try this command:

netstat -aon | findstr "8080"

This command will give process ID's. Then go to task manager and stop the process with this process id and then restart tomcat.

edited Dec 04 '12 at 00:18

Mark Henderson

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answered Apr 16 '12 at 12:20

Anil Sharma

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score 0 · Answer 5 · answered Jul 21 '09 at 16:41

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This can be done easily using the netstat utility.

answered Jul 21 '09 at 16:41

Jan Jungnickel

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score 0 · Answer 6 · answered Jul 21 '09 at 16:42

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use NETSTAT in a command prompt.

Wikipedia also lists the parameters.

answered Jul 21 '09 at 16:42

Sander Versluys

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score -1 · Answer 7 · answered Jul 21 '09 at 16:41

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telnet localhost 8080

If you can connect, then something's listening on the port.

answered Jul 21 '09 at 16:41

theotherreceive

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Tomcat could be listening just on internal / external interface and not on all / loopback interface. This test is not perfect. – Saurabh Barjatiya Jul 21 '09 at 16:42
also, a port is not necessarily available just because there is no application properly accepting connections. – Jan Jungnickel Jul 21 '09 at 16:48

Tomcat won't start - how to check that port 8080 is not in use

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