[rrd-developers] rrdcached PID file and socket

[Daniel.Pocock at barclayscapital.com]

I've occasionally had segfaults in rrdcached. I'm still investigating
the root cause.

However, two things I notice:

- When I try to restart rrdcached, it refuses to run because the PID
file already exists - maybe it should check the validity of the PID
file, and delete it if the process has gone away

- After deleting the PID file, I start rrdcached again.  This time, the
socket file /var/run/rrdcached/rrdcached.sock is still present from the
instance that segfaulted.  rrdcached deletes the socket file, but then
aborts.  I then have to start the process again to make it run.

Regards,

Daniel
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