项目启动时报死锁io.netty.util.concurrent.BlockingOperationException: AbstractChannel$CloseFuture@5a74c9ec(incomplete)

[qingshuhu]

An exception was thrown by com.newlandframework.rpc.netty.MessageRecvExecutor$2.operationComplete()
io.netty.util.concurrent.BlockingOperationException: AbstractChannel$CloseFuture@12f3c0d1(incomplete)
at io.netty.util.concurrent.DefaultPromise.checkDeadLock(DefaultPromise.java:391) ~[netty-all-4.0.36.Final.jar:4.0.36.Final]
at io.netty.channel.DefaultChannelPromise.checkDeadLock(DefaultChannelPromise.java:157) ~[netty-all-4.0.36.Final.jar:4.0.36.Final]
at io.netty.util.concurrent.DefaultPromise.await(DefaultPromise.java:252) ~[netty-all-4.0.36.Final.jar:4.0.36.Final]
at io.netty.channel.DefaultChannelPromise.await(DefaultChannelPromise.java:129) ~[netty-all-4.0.36.Final.jar:4.0.36.Final]
at io.netty.channel.DefaultChannelPromise.await(DefaultChannelPromise.java:28) ~[netty-all-4.0.36.Final.jar:4.0.36.Final]
at io.netty.util.concurrent.DefaultPromise.sync(DefaultPromise.java:219) ~[netty-all-4.0.36.Final.jar:4.0.36.Final]
at io.netty.channel.DefaultChannelPromise.sync(DefaultChannelPromise.java:117) ~[netty-all-4.0.36.Final.jar:4.0.36.Final]
at io.netty.channel.DefaultChannelPromise.sync(DefaultChannelPromise.java:28) ~[netty-all-4.0.36.Final.jar:4.0.36.Final]
at com.newlandframework.rpc.netty.MessageRecvExecutor$2.operationComplete(MessageRecvExecutor.java:144) ~[classes/:?]
at com.newlandframework.rpc.netty.MessageRecvExecutor$2.operationComplete(MessageRecvExecutor.java:135) ~[classes/:?]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:683) [netty-all-4.0.36.Final.jar:4.0.36.Final]
at io.netty.util.concurrent.DefaultPromise$LateListeners.run(DefaultPromise.java:854) [netty-all-4.0.36.Final.jar:4.0.36.Final]
at io.netty.util.concurrent.DefaultPromise$LateListenerNotifier.run(DefaultPromise.java:882) [netty-all-4.0.36.Final.jar:4.0.36.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:358) [netty-all-4.0.36.Final.jar:4.0.36.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:374) [netty-all-4.0.36.Final.jar:4.0.36.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112) [netty-all-4.0.36.Final.jar:4.0.36.Final]
at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137) [netty-all-4.0.36.Final.jar:4.0.36.Final]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
[id: 0x891ad835] REGISTERED
[id: 0x891ad835] BIND(0.0.0.0/0.0.0.0:18886)
You can open your web browser see NettyRPC server api interface: http://127.0.0.1:18886/NettyRPC.html
[id: 0x891ad835, L:/0:0:0:0:0:0:0:0:18886] ACTIVE
Disconnected from the target VM, address: '127.0.0.1:51430', transport: 'socket'

[tang-jie]

之前的服务有没有停干净？18886端口有没有被占用？

[helloktz]

不能在同一个线程中调用sync方法,会触发NioEventLoop的死锁检查。 此处sync()方法实际会执行失败。
可以在operationComplete方法结尾尝试System.out.println标志来验证。

[yiwuwang]

请问如何解决这个异常，（虽然即使有这个异常，程序也能正常运行）

[helloktz]

去掉sync(),: channelFuture.channel().closeFuture().addListener(...

[yiwuwang]

@helloktz 哦，谢谢

[wxz1211]

可以不用channelFuture.channel().closeFuture().addListener这种方式 ，
把netty服务端和http协议都改成线程模型，sync不用去掉

[gccdChen]

可以不用channelFuture.channel().closeFuture().addListener这种方式 ，
把netty服务端和http协议都改成线程模型，sync不用去掉

怎么改成线程模型?