Java21 + grpc 1.63.0 ServerBuilder.forPort() function error

[mengqing20101212]

EBUG|2024-05-11 14:13:10,249 +0800|io.grpc.netty.shaded.io.netty.util.internal.PlatformDependent0|direct buffer constructor: unavailable
java.lang.UnsupportedOperationException: Reflective setAccessible(true) disabled
	at io.grpc.netty.shaded.io.netty.util.internal.ReflectionUtil.trySetAccessible(ReflectionUtil.java:31) ~[grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.netty.util.internal.PlatformDependent0$5.run(PlatformDependent0.java:293) ~[grpc-netty-shaded-1.63.0.jar:1.63.0]
	at java.security.AccessController.doPrivileged(AccessController.java:319) ~[?:?]
	at io.grpc.netty.shaded.io.netty.util.internal.PlatformDependent0.<clinit>(PlatformDependent0.java:286) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.netty.util.internal.PlatformDependent.isAndroid(PlatformDependent.java:331) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.netty.util.internal.PlatformDependent.<clinit>(PlatformDependent.java:86) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.netty.util.AsciiString.<init>(AsciiString.java:225) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.netty.util.AsciiString.<init>(AsciiString.java:212) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.netty.util.AsciiString.cached(AsciiString.java:1403) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.netty.util.AsciiString.<clinit>(AsciiString.java:48) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.grpc.netty.Utils.<clinit>(Utils.java:80) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.grpc.netty.NettyServerBuilder.<clinit>(NettyServerBuilder.java:83) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.grpc.netty.NettyServerProvider.builderForPort(NettyServerProvider.java:40) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.grpc.netty.NettyServerProvider.builderForPort(NettyServerProvider.java:25) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.ServerBuilder.forPort(ServerBuilder.java:44) [grpc-api-1.63.0.jar:1.63.0]
	at com.tiktaalik.gs.GrpcServer.initGrpcServer(GrpcServer.java:89) [classes/:?]



DEBUG|2024-05-11 14:13:10,322 +0800|io.grpc.netty.shaded.io.netty.util.internal.PlatformDependent0|jdk.internal.misc.Unsafe.allocateUninitializedArray(int): unavailable
java.lang.IllegalAccessException: class io.grpc.netty.shaded.io.netty.util.internal.PlatformDependent0$7 cannot access class jdk.internal.misc.Unsafe (in module java.base) because module java.base does not export jdk.internal.misc to unnamed module @470734c3
	at jdk.internal.reflect.Reflection.newIllegalAccessException(Reflection.java:394) ~[?:?]
	at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:714) ~[?:?]
	at java.lang.reflect.Method.invoke(Method.java:571) ~[?:?]
	at io.grpc.netty.shaded.io.netty.util.internal.PlatformDependent0$7.run(PlatformDependent0.java:429) ~[grpc-netty-shaded-1.63.0.jar:1.63.0]
	at java.security.AccessController.doPrivileged(AccessController.java:319) ~[?:?]
	at io.grpc.netty.shaded.io.netty.util.internal.PlatformDependent0.<clinit>(PlatformDependent0.java:420) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.netty.util.internal.PlatformDependent.isAndroid(PlatformDependent.java:331) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.netty.util.internal.PlatformDependent.<clinit>(PlatformDependent.java:86) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.netty.util.AsciiString.<init>(AsciiString.java:225) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.netty.util.AsciiString.<init>(AsciiString.java:212) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.netty.util.AsciiString.cached(AsciiString.java:1403) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.netty.util.AsciiString.<clinit>(AsciiString.java:48) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.grpc.netty.Utils.<clinit>(Utils.java:80) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.grpc.netty.NettyServerBuilder.<clinit>(NettyServerBuilder.java:83) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.grpc.netty.NettyServerProvider.builderForPort(NettyServerProvider.java:40) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.netty.shaded.io.grpc.netty.NettyServerProvider.builderForPort(NettyServerProvider.java:25) [grpc-netty-shaded-1.63.0.jar:1.63.0]
	at io.grpc.ServerBuilder.forPort(ServerBuilder.java:44) [grpc-api-1.63.0.jar:1.63.0]
	at com.tiktaalik.gs.GrpcServer.initGrpcServer(GrpcServer.java:89) [classes/:?]

What version of gRPC-Java are you using?

What is your environment?

java21

What did you expect to see?

What did you see instead?

Steps to reproduce the bug

[ejona86]

These are DEBUG logs. Did anything actually go wrong?

[mengqing20101212]

no, I just saw the exception being thrown, so I came to ask if it's caused by Java 21

[kannanjgithub]

It is just debugging logging to record why direct buffer constructor could not be used in the Netty library. Reg the first stacktrace for example, Netty code has different control flows for when direct buffer constructor is available vs not available, and it should not have any impact on the functionality.
It looks like this log would be seen for any Java version 9 or above based on the check here.

[mengqing20101212]

ok , I know , Thank you very much