xdebug time out errors debugging PHP v8 code

Basically, Netbeans is current unusable for developing and debugging code using PHP 8.0.

PHP v8.0 requires xdebug v3.0.1   Following the xdebug configuration instructions as follows

zend_extension = C:\Program Files\php\8.0\ext\php_xdebug-3.0.1-8.0-vs16-nts-x86_64.dll
xdebug.mode=debug
xdebug.remote_enable=on
xdebug.remote_host=localhost

I am finding that I receive a large number of xdebug timeout errors linked to the connection between the IDE and webbrowser.

[01-Jan-2021 11:31:36 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:31:36 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:31:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:31:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:32:36 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:32:36 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:32:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:32:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:34:36 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:34:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:34:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:34:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:36:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:36:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:36:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:36:38 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:38:36 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:38:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:38:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:38:38 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:40:36 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:40:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:40:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:40:37 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:45:15 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:45:15 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:45:15 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:45:16 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:45:32 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:45:33 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:45:33 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:45:33 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:45:34 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:45:46 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:45:46 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:45:47 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:45:47 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:45:47 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:46:00 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)
[01-Jan-2021 11:46:01 UTC] Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: localhost:9003 (through xdebug.client_host/xdebug.client_port)

It appears to be a state problem as the debugger session runs OK, but if you attempt to stop the debugging session from the Netbeans IDE, the communication between browser is stopped. The only workaround I have found is to reset the Netbeans workspace IDE.

As per the xdebug 3.0.1 installation instructions, I have change the debug port within the Netbeans IDE environment to use port 9003.