[dogstatsd] Parse distribution metrics and ignore them #3458
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What does this PR do?
Parses
distribution
metrics and ignores them.Motivation
distribution
is a new dogstatsd metric type that this implementation doesn'tsupport.
Instead of failing on known but unsupported metric types, ignore these
metrics and continue parsing the rest of the packet.
Without this, sending a new "distribution" type metric in a datagram
makes dogstatsd drop the whole datagram.
Additional Notes
This change has virtually no impact on the performance of the dogstatsd
parser.