---
(If this PR fixes a github issue, please add `Fixes #<xyz>`)
Fixes#13023
(or if this PR is one task of a github issue, please add `Master Issue: #<xyz>`
to link to the master issue)
Master Issue: #13023
*Motivation*
Currently, StubServer can stop itself (by Stop()) before it start its
grpc server (created by Start()). This race condition may lead to a
goroutine leak mentioned by #13023.
*Modifications*
This PR add a channel to force the Stop() started after Start()
*Verify this change*
Please pick either of following options.
- This change is already covered by existing tests, such as *(please describe tests)*.
Test/TestEtcdGrpcResolver
