core: DelayedStream should start() real stream immediately #7750
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DelayedClientTransport needs to avoid becoming terminated while it owns RPCs. Previously DelayedClientTransport could terminate when some of its RPCs had their realStream but realStream.start() hadn't yet been called. To avoid that, we now make sure to call realStream.start() synchronously with setting realStream. Since start() and the method calls before start execute quickly, we can run it in-line. But it does mean we now need to split the Stream methods into "before start" and "after start" categories for queuing. Fixes grpc#6283
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A test will be added as part of #7749 |
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We went through the flow, and here is an over simplified chart to illustrate why RPCs will never be orphaned after the fix. FYI @dapengzhang0 |
dapengzhang0
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Jan 7, 2021
YifeiZhuang
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Jan 7, 2021
YifeiZhuang
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Jan 20, 2021
YifeiZhuang
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Jan 29, 2021
Add more delayedStream tests related to #7750, where we changed to call realStream.start() synchronously with setting realStream.
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DelayedClientTransport needs to avoid becoming terminated while it owns
RPCs. Previously DelayedClientTransport could terminate when some of its
RPCs had their realStream but realStream.start() hadn't yet been called.
To avoid that, we now make sure to call realStream.start()
synchronously with setting realStream. Since start() and the method
calls before start execute quickly, we can run it in-line. But it does
mean we now need to split the Stream methods into "before start" and
"after start" categories for queuing.
Fixes #6283
CC @voidzcy