mirror of https://github.com/grpc/grpc-java.git
2604ce8a55
This is missing behavior defined in gRFC A74:
> As per gRFC A31, the ConfigSelector gives each RPC a ref to the
> cluster that was selected for it to ensure that the cluster is not
> removed from the xds_cluster_manager LB policy config before the RPC
> is done with its LB picks. These cluster refs will also hold a
> subscription for the cluster from the XdsDependencyManager, so that
> the XdsDependencyManager will not stop watching the cluster resource
> until the cluster is removed from the xds_cluster_manager LB policy
> config.
Without the logic, RPCs can race and see the error:
> INTERNAL: CdsLb for cluster0: Unable to find non-dynamic root cluster
Fixes #12152. This fixes the regression introduced in
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