Re: TCP failed connection attempts

[Dan Van Der Ster <daniel.vanderster@xxxxxxx>]

On 26 Mar 2014 at 21:33:06, Sergey Malinin (hell@xxxxxxxxxxx) wrote:

This is typical (output from netstat -s):

    50329019 active connections openings

    15218590 passive connection openings

    44167087 failed connection attempts

Taking into account that presumably you don't have anything besides osd daemon running on the machine, i would say that this is extraordinarily large
number indicating that something is definitely going wrong.

This was my thinking as well. I am seeing this on a test cluster with very few real clients, so most of the connect attempts should be replication from other OSDs.

The suggested sysctl changes didn’t stop the failed conn attempts from increasing. I’m going to keep looking around…

Cheers, Dan

-- Dan van der Ster || Data & Storage Services || CERN IT Department --

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