Hi Cristoph, On 7/6/19 9:39 PM, Christoph wrote: > we run a small DoH server using dnsdist > and are observing an almost linear growth > of dnsdist's file descriptor usage > (initially about ~1k/day now down to ~500/day) > > Is this expected behavior?
No, it's not. Would you be able to issue a lsof -n -p <pid of the dnsdist process>? If you don't want to shared the whole output, for example because of the IP addresses listed in there, can you at least confirm that most of the file descriptors are incoming TCP sockets from clients to the DoH port? It could also be TCP connections from dnsdist to your backend but we do clean these up regularly. I wonder if that might be related to , which fixes an issue with timeouts. Would you be willing to test it? We can provide packages if needed. > What will happen when it hits the limit > of 16k? We might refuse new TCP connections, or if we fail to properly handle a case you might see dnsdist restarting after an unhandled exception. : https://github.com/PowerDNS/pdns/pull/7927 Best regards, -- Remi Gacogne PowerDNS.COM BV - https://www.powerdns.com/
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