Upgrade to Netty 4.2.15 - #12856
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ejona86 merged 3 commits intoJun 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.
For Gradle we pull this in transitively.
kannanjgithub
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…13005) In #12969, updating the `1.81.x-` row in place inadvertently overwrote the entries for past releases. Because a few updates #12805 and #12856 were missed in `SECURITY.md`, releases `1.82.x` and `1.83.x` were omitted. This PR restores the accurate Netty and netty-tcnative version mappings for each release: - `1.81.x`: Netty `4.1.132.Final` / netty-tcnative `2.0.75.Final` (#12738) - `1.82.x`: Netty `4.1.133.Final` / netty-tcnative `2.0.75.Final` (#12805) - `1.83.x`: Netty `4.2.15.Final` / netty-tcnative `2.0.75.Final` (#12856) - `1.84.x-`: Netty `4.2.16.Final` / netty-tcnative `2.0.81.Final` (#12969) Resolves #12969 (comment)
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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.