netty: Differentiate GOAWAY closure status descriptions #7502
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| @dapengzhang0, ping |
With this, it will be clear if the RPC failed because the server didn't use a double-GOAWAY or if it failed because of MAX_CONCURRENT_STREAMS or if it was due to a local race. It also fixes the status code to be UNAVAILABLE except for the RPCs included in the GOAWAY error (modulo the Netty bug). Fixes grpc#5855
ejona86 force-pushed the netty-differentiate-goaways branch from 610a8d7 to 99914ff Compare 
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With this, it will be clear if the RPC failed because the server didn't
use a double-GOAWAY or if it failed because of MAX_CONCURRENT_STREAMS or
if it was due to a local race. It also fixes the status code to be
UNAVAILABLE except for the RPCs included in the GOAWAY error (modulo the
Netty bug).
Fixes #5855
This depends on #7501