Bump grpc-java to 1.81.0 to silence Java 25 Unsafe deprecation warning#873
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ahmedmuhsin merged 4 commits intoJun 3, 2026
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Bumps io.grpc:grpc-netty-shaded (and grpc-protobuf, grpc-stub, protoc-gen-grpc-java) from 1.75.0 to 1.81.0, which pulls in shaded Netty 4.1.132. The previous shaded Netty (4.1.118 inside grpc-java 1.75.0) called the now terminally-deprecated sun.misc.Unsafe::allocateMemory, producing noisy warnings on JDK 23+ (and especially JDK 25). Netty 4.1.124+ routes direct-buffer allocation away from the deprecated method, so the warning goes away without any code or launch-argument changes. grpc-java 1.81.0 still targets Java 8 bytecode (animal-sniffer is still on the dependency tree), so this preserves Java 8 compatibility for the worker.
ahmedmuhsin
requested review from
TsuyoshiUshio,
gavin-aguiar,
hallvictoria,
swapnil-nagar and
vrdmr
as code owners
May 15, 2026 01:16
…unctions-java-worker into fix/grpc-netty-shaded-bump-java25
gavin-aguiar
previously approved these changes
May 19, 2026
| <mockito-core.version>4.11.0</mockito-core.version> | ||
| <appinsights.agents.version>3.7.6</appinsights.agents.version> | ||
| <grpc.version>1.75.0</grpc.version> | ||
| <grpc.version>1.81.0</grpc.version> |
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Do you also need to update protobuf to a compatible version?
Bumps protobuf-java (and the matching protoc artifact used by protobuf-maven-plugin) from 3.25.5 to 3.25.8. Same minor (3.25.x), patch-level fixes only, fully compatible with grpc-protobuf 1.81.0 which declares 3.25.5 as the minimum.
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@gavin-aguiar Good call. |
gavin-aguiar
approved these changes
Jun 3, 2026
ahmedmuhsin
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Jul 24, 2026
#873) * Bump grpc-java to 1.81.0 to silence Java 25 Unsafe deprecation warning Bumps io.grpc:grpc-netty-shaded (and grpc-protobuf, grpc-stub, protoc-gen-grpc-java) from 1.75.0 to 1.81.0, which pulls in shaded Netty 4.1.132. The previous shaded Netty (4.1.118 inside grpc-java 1.75.0) called the now terminally-deprecated sun.misc.Unsafe::allocateMemory, producing noisy warnings on JDK 23+ (and especially JDK 25). Netty 4.1.124+ routes direct-buffer allocation away from the deprecated method, so the warning goes away without any code or launch-argument changes. grpc-java 1.81.0 still targets Java 8 bytecode (animal-sniffer is still on the dependency tree), so this preserves Java 8 compatibility for the worker. * Bump protobuf-java and protoc to 3.25.8 Bumps protobuf-java (and the matching protoc artifact used by protobuf-maven-plugin) from 3.25.5 to 3.25.8. Same minor (3.25.x), patch-level fixes only, fully compatible with grpc-protobuf 1.81.0 which declares 3.25.5 as the minimum.
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Why
Running the worker on Java 25 produces these warnings on startup:
The warning comes from the shaded Netty inside
grpc-netty-shaded(Netty4.1.118.Finalships insidegrpc-java 1.75.0). Netty 4.1.x calls the now terminally-deprecatedsun.misc.Unsafe::allocateMemoryfor direct-buffer allocation; JDK 23+ flagged that method, and JDK 25 prints the warning on startup.What
Bumps
grpc.versionfrom1.75.0→1.81.0(latest stable). That pulls in shaded Netty4.1.132.Final, which routes direct-buffer allocation away from the deprecated method, so the warning disappears with no code or launch-argument changes.Java 8 compatibility
grpc-java 1.81.0still targets Java 8 bytecode and ships withanimal-snifferchecks intact (visible in the dependency tree), so this keeps the worker compatible with the full Java 8 → 25 range we support.Verification
mvn clean package -DskipTestssucceeds; uber-jar correctly bundlesgrpc-*-1.81.0andgrpc-netty-shaded-1.81.0.mvn test: 63/63 tests pass, no regressions.sun.misc.Unsafe::allocateMemorywarning no longer appears.