Re: poll() blocked / packets not received ?

[Nicolas Cannasse]

> TCP being reliable can block indefinitely, you can employ TCP keepalive
> to change indefinite to quite a long time.

Ok, funny thing is that we just found what is occurring...

We had a process that was on a regular basis doing the following :

conntrack -F

This was done in order to prevent the table to grow too big, because we 
were reaching the maximum size as told by :

/proc/sys/net/ipv4/netfilter/ip_conntrack_max
  and
/proc/sys/net/ipv4/netfilter/ip_conntrack_count

Seems like when there are active connections, this will break netfilter 
and stop delivering packets to the socket.

At least I will have nice sleep tonight.

Best,
Nicolas
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