我习惯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);
}
}
有时服务器会关闭,但会出现以下异常:
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
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)
在Ubuntu 16.04上
请帮我在这里找出问题所在。如果需要任何其他细节,请告诉我。
答案 0 :(得分:1)
这很可能是因为在关闭100%完成之前卸载了jar。 .shutdownGracefully(...)
是异步的,因此您应在此处使用.shutdownGracefully(...).sync()
。