[英]Netty server shutdown exception
I have used to following code to handle server shutdown:我曾经使用以下代码来处理服务器关闭:
public void stop() {
try {
this.channelFuture.channel().close();
this.channelFuture.channel().closeFuture().sync();
} catch (InterruptedException e) {
Log.exceptionStack(e);
} finally {
this.bootstrap.config().childGroup().shutdownGracefully(10, 30, TimeUnit.SECONDS);
this.bootstrap.config().group().shutdownGracefully(5, 10, TimeUnit.SECONDS);
}
}
Sometimes the server shutsdown with the following exception:有时服务器会因以下异常而关闭:
Exception in thread "nioEventLoopGroup-3-1" java.lang.NoClassDefFoundError: io/netty/buffer/PoolArena$1
at io.netty.buffer.PoolArena.freeChunk(PoolArena.java:293)
at io.netty.buffer.PoolThreadCache$MemoryRegionCache.freeEntry(PoolThreadCache.java:471)
at io.netty.buffer.PoolThreadCache$MemoryRegionCache.free(PoolThreadCache.java:441)
at io.netty.buffer.PoolThreadCache$MemoryRegionCache.free(PoolThreadCache.java:433)
at io.netty.buffer.PoolThreadCache.free(PoolThreadCache.java:290)
at io.netty.buffer.PoolThreadCache.free(PoolThreadCache.java:281)
at io.netty.buffer.PoolThreadCache.free0(PoolThreadCache.java:254)
at io.netty.buffer.PoolThreadCache.free(PoolThreadCache.java:250)
at io.netty.buffer.PooledByteBufAllocator$PoolThreadLocalCache.onRemoval(PooledByteBufAllocator.java:431)
at io.netty.buffer.PooledByteBufAllocator$PoolThreadLocalCache.onRemoval(PooledByteBufAllocator.java:408)
at io.netty.util.concurrent.FastThreadLocal.remove(FastThreadLocal.java:226)
at io.netty.util.concurrent.FastThreadLocal.removeAll(FastThreadLocal.java:67)
at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:146)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: io.netty.buffer.PoolArena$1
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 14 more
Exception in thread "Thread-1" java.lang.NoClassDefFoundError: io/netty/channel/AbstractChannelHandlerContext$13
at io.netty.channel.AbstractChannelHandlerContext.close(AbstractChannelHandlerContext.java:610)
at io.netty.channel.AbstractChannelHandlerContext.close(AbstractChannelHandlerContext.java:465)
at io.netty.channel.DefaultChannelPipeline.close(DefaultChannelPipeline.java:964)
at io.netty.channel.AbstractChannel.close(AbstractChannel.java:234)
at co.gps.smaartly.TrackerServer.stop(TrackerServer.java:59)
at co.gps.smaartly.ServerManager.stop(ServerManager.java:90)
at co.gps.smaartly.App$1.run(App.java:22)
Caused by: java.lang.ClassNotFoundException: io.netty.channel.AbstractChannelHandlerContext$13
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more
I am using netty version 4.1.9.Final on JVM version:我在 JVM 版本上使用 netty 版本 4.1.9.Final:
java version "1.8.0_121"
Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)
On Ubuntu 16.04在 Ubuntu 16.04 上
Please help me identify the issue here.请帮我确定这里的问题。 Let me know if any other details are required.
如果需要任何其他详细信息,请告诉我。
This is most likely because the jar is unloaded before the shutdown is 100 % complete.这很可能是因为 jar 在关闭 100% 完成之前被卸载。
.shutdownGracefully(...)
is asynchronous so you should use .shutdownGracefully(...).sync()
here. .shutdownGracefully(...)
是异步的,所以你应该在这里使用.shutdownGracefully(...).sync()
。
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