On 08/04/2016 01:36 PM, Armando M. wrote:
Hi Neutrinos,
I have noticed that Liberty seems to be belly up [1]. I wonder if anyone knows
anything or has the time to look into it.
Many thanks,
Armando
[1] https://review.openstack.org/#/c/349039/
This could be due to this backport;
https://review.openstack.org/#/c/347062/
Before we were doing 'ping -c 3 -W 1 $IP', which will succeed as long as one
packet is returned.
Now there is an outer loop that runs 'ping -c 1 -W 1 $IP', so a single dropped
packet could cause an error. Since sometimes that first packet causes ARP to
happen, any delay near the 1-second mark looks like a lost packet, but is really
just transient and packets 2 and 3 are fine.
I've started a revert and will recheck, but if I'm right an async issue like
this is hard to reliably reproduce - I had to use iptables directly to test my
theory about the return code from ping when 1/3 packets were lost.
-Brian
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