Upgrade to Netty 4.2.15#12856
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Netty 4.2 has the thread classes interact in a new way, so they've deprecated the Netty 4.1 threading APIs. While we want to use Netty 4.2, not all build systems compiling gRPC may have upgraded to 4.2 yet, so let's not begin using Netty 4.2 APIs yet.
For Gradle we pull this in transitively.
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kannanjgithub
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Jun 11, 2026
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Netty 4.2 has the thread classes interact in a new way, so they've deprecated the Netty 4.1 threading APIs. While we want to use Netty 4.2, not all build systems compiling gRPC may have upgraded to 4.2 yet, so let's not begin using Netty 4.2 APIs yet.