Could not start GlassFish 4.0 (Windows) - port 1527 - Address already in use

To find the process¹ that keeps the busy port, try the following command:

netstat -ano | find "1527"

This will show a line with the port and the identifier of the process. e.g.:

TCP    127.0.0.1:1527         0.0.0.0:0              LISTENING       2268

Once you have the process ID (e.g. 2268), run the following command for release the port (this will kill the process):

taskkill /F /PID 2268

Now, try to start Glassfish.

On Linux:

lsof -Pnl +M -i6 | grep 1527

Produces:

java    31139     1001   32u  IPv6 114916062      0t0  TCP 127.0.0.1:1527 (LISTEN)

Killed with:

kill -9 31139

¹ If you want to know the associated program, see How do I find out what service is using a certain port?

If the above doesn't work for anyone pls follow the below steps.. Sure It will work..

1. Go to C:\Program Files\glassfish-4.1\glassfish\domains\domain1\config

2. Open "domain.xml" in a xml editor or u can use notepad++

3. Find "8080"(below highlighted for ur reference)

   network-listener port="8080" protocol="http-listener-1" transport="tcp" name="http-listener-1" thread-pool="http-thread-pool"

4. Replace "8080" with any open port. If you don't know how to find out open port try to use port no "3702" then save your file

5. now run your project

After running the project please have an eye on the URL

http://localhost:8080/...... should be http://localhost:3702/.....

To get open ports follow the below steps

1. open cmd.exe

2. execute cmd "netstat -ano"

Pick any one which you find is free(Like inside the green box above )

This is not an error you need to worry about. When you start GlassFish, NetBeans will also start the JavaDB (aka, Derby) database, which listens on port 1527 by default. When you shut down NetBeans, it will shut down GlassFish but will not shut down JavaDB. Therefore, when you start NetBeans a second time, NetBeans will try to start JavaDB again and fail because it is already running and listening on port 1527.

To shut down the database, you can use the NetBeans Services(Tab)->Databases->JavaDB(right click->Stop Server. To shut down from the command line use $NETBEANS_HOME/glassfish-4.0/javadb/bin/stopNetworkServer, where $NETBEANS_HOME is the top-level directory where NetBeans is installed (at least on Mac/Linux/Unix).