#18582
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master: 89%

Ran 25 Apr 2023 10:21PM UTC

Jobs 1

Files 554

Run time 11s

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Build # #18582

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push

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Committed by

web-flow

Commit Message

xds: Allow child of cluster_impl LB to change (#10091) (#10098)

Under normal conditions the child LB of `ClusterImplLoadBalancer` does
not fluctuate, based on the field used to configure load balancing in
the xDS `Cluster` proto it is either:

1. `WrrLocalityLoadBalancer` if the newer `load_balancing_policy` field
   is used
2. `WeightedTargetLoadBalancer` if the legacy `lb_policy` field is used

`ClusterImplLoadBalancer` currently assumes that this child does not
change and so does not change the child LB when the name resolver sends an
update. If the control plane does switch to using a different field for
LB config, that update will have an LB config meant for the other child
LB type. This will result in a ClassCastException and a channel panic.

To address this, `ClusterImplLoadBalancer` will now use
`GracefulSwitchLoadBalancer` and makes sure if the child policy changes
the correct LB implementation is switched to.

Run Details

30828 of 34984 relevant lines covered (88.12%)

0.88 hits per line

Jobs

ID	Job ID	Ran	Files	Coverage
1	#18582.1	25 Apr 2023 10:21PM UTC	554	88.12

grpc / grpc-java / #18582
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master: 89%

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