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xds: priority reset failover timer when connecting if seen ready or idle since TF (#9093) (1.46.x backport) #9098

Merged
merged 1 commit into from Apr 20, 2022
Merged

xds: priority reset failover timer when connecting if seen ready or idle since TF (#9093) (1.46.x backport) #9098

merged 1 commit into from Apr 20, 2022

Commits on Apr 20, 2022

  1. xds: priority reset failover timer when connecting if seen ready or i… 

    …dle since TF (grpc#9093)

changes in priority:
Keep track of whether a child has seen TRANSIENT_FAILURE more recently than IDLE or READY, and use this to decide whether to restart the failover timer when a child reports CONNECTING. This ensures that we properly start the failover timer when the ring_hash child policy transitions from IDLE to CONNECTING at startup.
Behaviour change also affects address updates the current priority from CONNECTING to CONNECTING, previously it reports one CONNECTING, right now it does not report and wait there due to failover timer in effect. This helps to try the next priority.
    @YifeiZhuang
    YifeiZhuang committed Apr 20, 2022
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