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linkerd should read and write the l5d-ctx-retries header #880

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adleong opened this issue Jan 3, 2017 · 0 comments
Open

linkerd should read and write the l5d-ctx-retries header #880

adleong opened this issue Jan 3, 2017 · 0 comments

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@adleong
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adleong commented Jan 3, 2017

This is analogous to the Retries context in com.twitter.finagle.http.codec.HttpContext.
@adleong adleong mentioned this issue Jan 3, 2017
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Tim-Brooks pushed a commit to Tim-Brooks/linkerd that referenced this issue Dec 20, 2018
@olix0r
proxy: Expire metrics that have not been updated for 10 minutes (link…
ada5cb2 
…erd#880)

The proxy is now configured with the CONDUIT_PROXY_METRICS_RETAIN_IDLE
environment variable that dictates the amount of time that the proxy will retain
metrics that have not been updated.

A timestamp is maintained for each unique set of labels, indicating the last time
that the scope was updated. Then, when metrics are read, all metrics older than
CONDUIT_PROXY_METRICS_RETAIN_IDLE are dropped from the stats registry.

A ctx::test_utils module has been added to aid testing.

Fixes linkerd#819
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