sockets disabled, out-of-fds

Miroslav Lachman 000.fbsd at quip.cz
Thu Dec 8 11:55:03 CET 2016


Uz podruhe v relativne kratkem case se mi na jednom serveru stalo 
nasledujici:

Dec  7 14:09:30 XXX kernel: sonewconn: pcb 0xfffff80185dad188: Listen 
queue overflow: 193 already in queue awaiting acceptance (4946 occurrences)
Dec  7 14:10:24 XXX kernel: [zone: pf states] PF states limit reached
Dec  7 14:10:30 XXX kernel: sonewconn: pcb 0xfffff80185dad188: Listen 
queue overflow: 193 already in queue awaiting acceptance (15373 occurrences)
Dec  7 14:11:30 XXX kernel: sonewconn: pcb 0xfffff80185dad188: Listen 
queue overflow: 193 already in queue awaiting acceptance (13537 occurrences)

Kratce pred tim prestane odpovidat Lighttpd a v jeho logu je

2016-12-07 14:08:53: (connections.c.139) (warning) close: 55 Connection 
reset by peer
2016-12-07 14:08:59: (server.c.1759) [note] sockets disabled, out-of-fds

Takze predpokladam, ze ta sonewconn hlaska a PF states limit je az 
dusledek problemu Lighttpd.

Proces Lighttpd bezi, ale neodpovida, "service lighttpd restart" problem 
vyresi.

Da se tomu nejak predejit? Je tu neco, co bych mohl na systemu "vytunit"?

Ten server je v provozu radu let a nikdy predtim jsem tento problem 
nezpozoroval. Na grafech zateze a sitoveho provozu zadne vyrazne 
anomalie nevidim. Takze jestli tam probehne nejaky velky sitovy provoz, 
je to jen na tak kratkou dobu, ze se to neprojevi v grafu, ktery 
zobrazuje prumer za 5 minut.

Mirek


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