Check if Port 8080 is in Use – Troubleshoot Tomcat Startup Issues

startuptomcatwindows

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.

Best Answer

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.

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Tomcat – Can a naughty database app crash tomcat

I don't think anybody will have the answer to your problem, but only leads & ideas. Here are some:

you need robots that will check the health of each part of your service. (testing a single connection to your database, getting a static web page, getting a dynamic web page...). This way, you'll see what breaks first or response time increase.
do you have a monitoring/stats service? You need to keep track of the "number of active database connections", "number of active web sessions", "number of tomcat threads", "memory available", CPU...

My advice, there is no tomcat process left because they're all stuck waiting for a resource (maybe a database connection, or they're just an infinite loop!). The tools I listed before will definitely help you understand why your server is dying slowly every week.

run netstat on your server and look at the number of connections to the database server (and check it against your pool size and database server capacity).
run jstack on your app server and cut/grep/sort them to see what your threads are doing.

Tomcat – Unable to setup and access tomcat on EC2 with AMI

Looks like there is only a ipv6 tomcat socket and not an ipv4

:::8080 :::* LISTEN 1162/java

Best Answer

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Tomcat – Can a naughty database app crash tomcat

Tomcat – Unable to setup and access tomcat on EC2 with AMI

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