Lighttpd

Graceful restart does not currently work with FastCGI (PHP, others too?). When the new lighttpd process starts, it sees the socket files for the existing FastCGI processes and uses them. When the old lighttpd process dies, the FastCGI processes go with it, leaving the new lighttpd running alone.

A simple fix would be to have the lighttpd pid available as a configuration variable (e.g. var.pid) for replacement as such:

fastcgi.server = (
...
"socket" => "/tmp/php-fastcgi-" + pid + ".socket",
...
)

Our workaround at present is to emulate this behavior using a timestamp that's manually updated in the configuration file at each restart. With this workaround, graceful restart works great :).

Thanks,
James

-- jbyers