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Our development servers sends HTTP 502 when somebody on server restarts php-fpm. When this happens (or any other case causing HTTP 502) NetBeans loses connection with server, which is natural and then is not able to work again with xdebug again without restart. Scenario summary: 1. Start debugging with xdebug and php-fpm (other cases not tested). 2. Cause HTTP 5xx error in web-server. 3. Try to start to debug again. 4. NetBeans will be not able to handle again connections from web-server and PHP to debug.
I'm not able to test it with php-fpm right now. But I tried it with apache and it works properly for me. So P4 as a reminder.
Thank you! I should add that our web-server is nginx on Debian machine. Can I attach some debug information to help you guys to solve the problem?