[collectd] traffic plugin overflow

[Daniel Poelzleithner]

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Hi,

We use the traffic plugin primary to monitor openvpn traffic in a uml.
Usually there is constant 30kB/s traffic on the tap device. The problem
is, that traffic plugin seems to overflow when the openvpn server is
restarted, the tap0 device goes down and later up again. Causing to
generate a peak of traffic of many hundert or thousands of megabytes and
making the statistic useless.

I made a workaround to stop collectd before openvpn is stopped or
restarted, but still could cause problems if someone doesn't use the script.

Is this a know bug or a better fix for this ?

PS: please CC me, i'm not on the list :)

kindly regards
  Daniel
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