xds: Avoid PriorityLb re-enabling timer on duplicate CONNECTING (v1.75.x backport)#12290
Merged
ejona86 merged 1 commit intogrpc:v1.75.xfrom Aug 19, 2025
Merged
Conversation
…#12289) Since c4256ad we no longer fabricate a TRANSIENT_FAILURE update from children. However, previously that would have set seenReadyOrIdleSinceTransientFailure = false and prevented future timer creation. If a LB policy gives extraneous updates with state CONNECTING, then it was possible to re-create failOverTimer which would then wait the 10 seconds for the child to finish CONNECTING. We only want to give the child one opportunity after transitioning out of READY/IDLE. grpc/proposal#509
shivaspeaks
approved these changes
Aug 19, 2025
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to subscribe to this conversation on GitHub.
Already have an account?
Sign in.
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Backport of #12289 to v1.75.x.
Since c4256ad we no longer fabricate a TRANSIENT_FAILURE update from children. However, previously that would have set
seenReadyOrIdleSinceTransientFailure = false and prevented future timer creation. If a LB policy gives extraneous updates with state CONNECTING, then it was possible to re-create failOverTimer which would then wait the 10 seconds for the child to finish CONNECTING. We only want to give the child one opportunity after transitioning out of READY/IDLE.
grpc/proposal#509