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netty: Eagerly create SslContext - #3060
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Creating the SslContext can throw, generally due to broken ALPN. We want that to propagate to the caller of build(), instead of within the channel where it could easily cause hangs. We still delay creation until actual build() time, since TLS is not guaranteed to work and the application may be configuring plaintext or similar later before calling build() where SslContext is unnecessary. The only externally-visible change should be the exception handling. I'd add a test, but the things throwing are static and trying to inject them would be pretty messy. Fixes grpc#2599
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Creating the SslContext can throw, generally due to broken ALPN. We want
that to propagate to the caller of build(), instead of within the
channel where it could easily cause hangs.
We still delay creation until actual build() time, since TLS is not
guaranteed to work and the application may be configuring plaintext or
similar later before calling build() where SslContext is unnecessary.
The only externally-visible change should be the exception handling.
I'd add a test, but the things throwing are static and trying to inject
them would be pretty messy.
Fixes #2599