core: Apply RetryingNameResolver in ManagedChannelImpl (1.56.x backport) #10373
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Wrapping the DnsNameResolver in DnsNameResolverProvider can cause problems to external name resolvers that delegate to a DnsResolver already wrapped in RetryingNameResolver. ManagedChannelImpl would end up wrapping these name resolvers again, causing an exception later from a RetryingNameResolver safeguard that checks for double wrapping.
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Backport of #10371
Wrapping the
DnsNameResolverinDnsNameResolverProvidercan cause problems to external name resolvers that delegate to aDnsResolveralready wrapped in aRetryingNameResolver.ManagedChannelImplwould end up wrapping these name resolvers again, causing an exception later from aRetryingNameResolversafeguard that checks for double wrapping.This removes the wrapping logic from
DnsNameResolverProviderand hasManagedChannelImplalways explicitly do it