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gRPC Unavailable error code MAY be returned for any RPC that the plugin cannot currently process due to a transient condition. #345

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jdef opened this issue Jan 16, 2019 · 1 comment

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jdef commented Jan 16, 2019 •

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Some use cases:

plugin is still booting up and CO invoked a non-probe func before Probe returned OK.
plugin is overwhelmed with requests and cannot process further requests until it catches up
plugin is encountering transient network error conditions when communicating w/ the storage backend (e.g. read/write timeouts), and/or storage backend has indicated "too many requests" (so the plugin should try to shed load).

In response to receiving this error code a CO can choose to:

give up
back off and retry later

jdef mentioned this issue

Limit backlog of incoming requests. mesosphere/csilvm#84

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saad-ali commented Mar 6, 2019

Seems reasonable considering we don't define behavior for this (so no backwards compat worries).

saad-ali added the priority/p2 label

saad-ali added this to the v1.2 milestone

jdef modified the milestones: v1.2, v1.3

saad-ali modified the milestones: v1.3, v1.4

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