\nbproject\build-impl.xml:1030: Deployment error: Starting of Tomcat failed, the server port 8080 is already in use.
goto command prompt
Windows
netstat -aon
for linux
netstat -tulpn | grep 'your_port_number'
it will show you something like
TCP 192.1.200.48:2053 24.43.246.60:443 ESTABLISHED 248
TCP 192.1.200.48:2055 24.43.246.60:443 ESTABLISHED 248
TCP 192.1.200.48:2126 213.146.189.201:12350 ESTABLISHED 1308
TCP 192.1.200.48:3918 192.1.200.2:8073 ESTABLISHED 1504
TCP 192.1.200.48:3975 192.1.200.11:49892 TIME_WAIT 0
TCP 192.1.200.48:3976 192.1.200.11:49892 TIME_WAIT 0
TCP 192.1.200.48:4039 209.85.153.100:80 ESTABLISHED 248
TCP 192.1.200.48:8080 209.85.153.100:80 ESTABLISHED 248
check which process has binded your port. here in above example its 248 now if you are sure that you need to kill that process fire
Linux:
kill -9 248
Windows:
taskkill /f /pid 248
it will kill that process