Hi Sergio,
Assuming nobody is actually mounting a SYN flood attack, then this sounds like
you're either being hammered with connection requests in very short periods of
time, or your TCP backlog tuning is off. At least, that's where I'd start
looking. If you take that log message and google it (Possible SYN flooding...
Sending cookies") you'll find explanations. Or just googling "TCP backlog
tuning".
R
On 10/30/19, 3:29 PM, "Sergio Bilello" <lapostadiser...@gmail.com> wrote:
>
>Oct 17 00:23:03 prod-personalization-live-data-cassandra-08 kernel: TCP:
request_sock_TCP: Possible SYN flooding on port 9042. Sending cookies. Check
SNMP counters.
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