fix(pubsublite): prevent subscriber flow control token races #4060
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product-auto-label
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the
api: pubsublite
google-cla
bot
added
the
cla: yes
hongalex
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May 5, 2021
tmdiep
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kokoro:force-run
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kokoro:force-run
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Ensure that we send flowControlBatcher.RequestForRestart immediately after a new Subscribe stream is connected, before any batched flow control tokens are sent.
This hasn't been detected by tests or observed, but theoretically can occur via onAckAsync().