Oh nvm, didn't see the later msg about just posting what your fix was.
R
On 10/30/19, 4:24 PM, "Reid Pinchback" <rpinchb...@tripadvisor.com> wrote:
Message from External Sender
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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