Metric for requests with request hedging enabled
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area/http
area/stats
help wanted
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Description
*Title*: *Metric for request hedging*
*Description*:
Looking at the source
https://github.com/envoyproxy/envoy/blob/3e9b84809fbe78d0dd2c3c2e960aa2519505d251/source/common/router/router.cc#L240-L259
there doesn't appear to be a metric being emitted when request hedging is enabled. I'd like to have one there so I can tell how many requests it's been enabled for.
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