SpringBoot服务启动失败：gRPC服务器地址绑定异常求助

我用Gradle构建的SpringBoot服务启动失败，启动阶段连接gRPC服务器时出错。此前服务使用gRPC 1.24.0版本，现已升级至1.27.1。

gRPC连接实现代码 #

public static ManagedChannel getGrpcChannel(String host, int port, String serviceConfigJson) {
    return NettyChannelBuilder.forAddress(host, port)
        .enableRetry()
        .defaultServiceConfig(GrpcUtils.getServiceConfig(serviceConfigJson))
        .usePlaintext()
        .build();
}

启动时抛出的异常 #

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 
2022-12-23 16:54:54 [] ERROR [main] o.s.b.SpringApplication [SpringApplication.java:826] Application run failed 
org.springframework.context.ApplicationContextException: Failed to start bean 'shadedNettyGrpcServerLifecycle'; nested exception is java.lang.IllegalStateException: Failed to start the grpc server
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:185)
    at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:53)
    at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:360)
    at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:158)
    at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:122)
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:894)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:162)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)
    at com.test.SampleApplication.main(SampleApplication.java:37)
Caused by: java.lang.IllegalStateException: Failed to start the grpc server
    at net.devh.boot.grpc.server.serverfactory.GrpcServerLifecycle.start(GrpcServerLifecycle.java:51)
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:182)
    ... 14 common frames omitted
Caused by: java.io.IOException: Failed to bind
    at io.grpc.netty.shaded.io.grpc.netty.NettyServer.start(NettyServer.java:249)
    at io.grpc.internal.ServerImpl.start(ServerImpl.java:184)
    at io.grpc.internal.ServerImpl.start(ServerImpl.java:90)
    at net.devh.boot.grpc.server.serverfactory.GrpcServerLifecycle.createAndStartGrpcServer(GrpcServerLifecycle.java:90)
    at net.devh.boot.grpc.server.serverfactory.GrpcServerLifecycle.start(GrpcServerLifecycle.java:49)
    ... 15 common frames omitted
Caused by: java.net.BindException: Address already in use
    at sun.nio.ch.Net.bind0(Native Method)
    at sun.nio.ch.Net.bind(Net.java:461)
    at sun.nio.ch.Net.bind(Net.java:453)
    at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:222)
    at io.grpc.netty.shaded.io.netty.channel.socket.nio.NioServerSocketChannel.doBind(NioServerSocketChannel.java:132)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:551)
    at io.grpc.netty.shaded.io.netty.channel.DefaultChannelPipeline$HeadContext.bind(DefaultChannelPipeline.java:1346)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeBind(AbstractChannelHandlerContext.java:503)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.bind(AbstractChannelHandlerContext.java:488)
    at io.grpc.netty.shaded.io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:985)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannel.bind(AbstractChannel.java:247)
    at io.grpc.netty.shaded.io.netty.bootstrap.AbstractBootstrap$2.run(AbstractBootstrap.java:344)
    at io.grpc.netty.shaded.io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
    at io.grpc.netty.shaded.io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:510)
    at io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:518)
    at io.grpc.netty.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1044)
    at io.grpc.netty.shaded.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
    at io.grpc.netty.shaded.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    at java.lang.Thread.run(Thread.java:748)

已执行的排查操作 #

• 检查Netty默认端口及所有监听端口，未发现阻塞gRPC服务器启动的进程
• 尝试升降级gRPC依赖库版本

请问我还遗漏了哪些排查点？

内容的提问来源于stack exchange，提问作者N.Rajal