Ting Yuan 1b700e5ed8 Fix the goroutine leak in StubServer ...

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(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

2021-05-21 20:54:06 +08:00

..

stub_server.go

Fix the goroutine leak in StubServer

2021-05-21 20:54:06 +08:00