即使在发布后 Netty 资源泄漏
Netty resource leak even after release
为什么以下内容被认为是泄漏？
2016-12-04 09:24:01,534 ERROR [epollEventLoopGroup-2-1] [io.netty.util.ResourceLeakDetector] - LEAK: ByteBuf.release() was not called before it's garbage-collected. See http://netty.io/wiki
/reference-counted-objects.html for more information.
Recent access records: 5
#5:
io.netty.buffer.AdvancedLeakAwareByteBuf.release(AdvancedLeakAwareByteBuf.java:955)
com.example.network.listener.netty.PreprocessHandler.handle(PreprocessHandler.java:42)
com.example.network.listener.netty.UdpHandlerChain.handle(UdpHandlerChain.java:17)
com.example.network.listener.netty.UdpRequestExecutor.run(UdpRequestExecutor.java:89)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
java.lang.Thread.run(Thread.java:745)
#4:
io.netty.buffer.AdvancedLeakAwareByteBuf.readBytes(AdvancedLeakAwareByteBuf.java:495)
com.example.network.listener.netty.PreprocessHandler.handle(PreprocessHandler.java:39)
com.example.network.listener.netty.UdpHandlerChain.handle(UdpHandlerChain.java:17)
com.example.network.listener.netty.UdpRequestExecutor.run(UdpRequestExecutor.java:89)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
java.lang.Thread.run(Thread.java:745)
#3:
io.netty.buffer.AdvancedLeakAwareByteBuf.retain(AdvancedLeakAwareByteBuf.java:927)
io.netty.buffer.AdvancedLeakAwareByteBuf.retain(AdvancedLeakAwareByteBuf.java:35)
io.netty.util.ReferenceCountUtil.retain(ReferenceCountUtil.java:36)
io.netty.channel.DefaultAddressedEnvelope.retain(DefaultAddressedEnvelope.java:89)
io.netty.channel.socket.DatagramPacket.retain(DatagramPacket.java:67)
io.netty.channel.socket.DatagramPacket.retain(DatagramPacket.java:27)
io.netty.util.ReferenceCountUtil.retain(ReferenceCountUtil.java:36)
com.example.network.listener.netty.UdpRequestExecutor.channelRead(UdpRequestExecutor.java:71)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:373)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:359)
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:351)
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:373)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:359)
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926)
io.netty.channel.epoll.EpollDatagramChannel$EpollDatagramChannelUnsafe.epollInReady(EpollDatagramChannel.java:580)
io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:402)
io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:307)
io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:873)
io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
java.lang.Thread.run(Thread.java:745)
#2:
Hint: 'UdpRequestExecutor#0' will handle the message from this point.
io.netty.channel.DefaultAddressedEnvelope.touch(DefaultAddressedEnvelope.java:117)
io.netty.channel.socket.DatagramPacket.touch(DatagramPacket.java:85)
io.netty.channel.socket.DatagramPacket.touch(DatagramPacket.java:27)
io.netty.channel.DefaultChannelPipeline.touch(DefaultChannelPipeline.java:107)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:356)
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:351)
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:373)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:359)
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926)
io.netty.channel.epoll.EpollDatagramChannel$EpollDatagramChannelUnsafe.epollInReady(EpollDatagramChannel.java:580)
io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:402)
io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:307)
io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:873)
io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
java.lang.Thread.run(Thread.java:745)
#1:
Hint: 'DefaultChannelPipeline$HeadContext#0' will handle the message from this point.
io.netty.channel.DefaultAddressedEnvelope.touch(DefaultAddressedEnvelope.java:117)
io.netty.channel.socket.DatagramPacket.touch(DatagramPacket.java:85)
io.netty.channel.socket.DatagramPacket.touch(DatagramPacket.java:27)
io.netty.channel.DefaultChannelPipeline.touch(DefaultChannelPipeline.java:107)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:356)
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926)
io.netty.channel.epoll.EpollDatagramChannel$EpollDatagramChannelUnsafe.epollInReady(EpollDatagramChannel.java:580)
io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:402)
io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:307)
io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:873)
io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
java.lang.Thread.run(Thread.java:745)
Created at:
io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:271)
io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:179)
io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:170)
io.netty.buffer.AbstractByteBufAllocator.ioBuffer(AbstractByteBufAllocator.java:131)
io.netty.channel.DefaultMaxMessagesRecvByteBufAllocator$MaxMessageHandle.allocate(DefaultMaxMessagesRecvByteBufAllocator.java:73)
io.netty.channel.RecvByteBufAllocator$DelegatingHandle.allocate(RecvByteBufAllocator.java:124)
io.netty.channel.epoll.EpollDatagramChannel$EpollDatagramChannelUnsafe.epollInReady(EpollDatagramChannel.java:544)
io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:402)
io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:307)
io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:873)
io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
java.lang.Thread.run(Thread.java:745)
最后一次访问是显式的release()...
我正在使用 Netty 4.1。6.Final。
异常消息指向Netty Wiki。从该信息和跟踪来看，com.example.network.listener.netty.UdpRequestExecutor.channelRead(UdpRequestExecutor.java:71) 处的 buf.retain() 调用似乎是错误的。无论如何，在 GC 时，您的缓冲区引用计数是 > 0。您应该研究示例和责任矩阵才能正确使用引用计数。
为什么以下内容被认为是泄漏？
2016-12-04 09:24:01,534 ERROR [epollEventLoopGroup-2-1] [io.netty.util.ResourceLeakDetector] - LEAK: ByteBuf.release() was not called before it's garbage-collected. See http://netty.io/wiki
/reference-counted-objects.html for more information.
Recent access records: 5
#5:
io.netty.buffer.AdvancedLeakAwareByteBuf.release(AdvancedLeakAwareByteBuf.java:955)
com.example.network.listener.netty.PreprocessHandler.handle(PreprocessHandler.java:42)
com.example.network.listener.netty.UdpHandlerChain.handle(UdpHandlerChain.java:17)
com.example.network.listener.netty.UdpRequestExecutor.run(UdpRequestExecutor.java:89)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
java.lang.Thread.run(Thread.java:745)
#4:
io.netty.buffer.AdvancedLeakAwareByteBuf.readBytes(AdvancedLeakAwareByteBuf.java:495)
com.example.network.listener.netty.PreprocessHandler.handle(PreprocessHandler.java:39)
com.example.network.listener.netty.UdpHandlerChain.handle(UdpHandlerChain.java:17)
com.example.network.listener.netty.UdpRequestExecutor.run(UdpRequestExecutor.java:89)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
java.lang.Thread.run(Thread.java:745)
#3:
io.netty.buffer.AdvancedLeakAwareByteBuf.retain(AdvancedLeakAwareByteBuf.java:927)
io.netty.buffer.AdvancedLeakAwareByteBuf.retain(AdvancedLeakAwareByteBuf.java:35)
io.netty.util.ReferenceCountUtil.retain(ReferenceCountUtil.java:36)
io.netty.channel.DefaultAddressedEnvelope.retain(DefaultAddressedEnvelope.java:89)
io.netty.channel.socket.DatagramPacket.retain(DatagramPacket.java:67)
io.netty.channel.socket.DatagramPacket.retain(DatagramPacket.java:27)
io.netty.util.ReferenceCountUtil.retain(ReferenceCountUtil.java:36)
com.example.network.listener.netty.UdpRequestExecutor.channelRead(UdpRequestExecutor.java:71)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:373)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:359)
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:351)
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:373)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:359)
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926)
io.netty.channel.epoll.EpollDatagramChannel$EpollDatagramChannelUnsafe.epollInReady(EpollDatagramChannel.java:580)
io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:402)
io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:307)
io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:873)
io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
java.lang.Thread.run(Thread.java:745)
#2:
Hint: 'UdpRequestExecutor#0' will handle the message from this point.
io.netty.channel.DefaultAddressedEnvelope.touch(DefaultAddressedEnvelope.java:117)
io.netty.channel.socket.DatagramPacket.touch(DatagramPacket.java:85)
io.netty.channel.socket.DatagramPacket.touch(DatagramPacket.java:27)
io.netty.channel.DefaultChannelPipeline.touch(DefaultChannelPipeline.java:107)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:356)
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:351)
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:373)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:359)
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926)
io.netty.channel.epoll.EpollDatagramChannel$EpollDatagramChannelUnsafe.epollInReady(EpollDatagramChannel.java:580)
io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:402)
io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:307)
io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:873)
io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
java.lang.Thread.run(Thread.java:745)
#1:
Hint: 'DefaultChannelPipeline$HeadContext#0' will handle the message from this point.
io.netty.channel.DefaultAddressedEnvelope.touch(DefaultAddressedEnvelope.java:117)
io.netty.channel.socket.DatagramPacket.touch(DatagramPacket.java:85)
io.netty.channel.socket.DatagramPacket.touch(DatagramPacket.java:27)
io.netty.channel.DefaultChannelPipeline.touch(DefaultChannelPipeline.java:107)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:356)
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926)
io.netty.channel.epoll.EpollDatagramChannel$EpollDatagramChannelUnsafe.epollInReady(EpollDatagramChannel.java:580)
io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:402)
io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:307)
io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:873)
io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
java.lang.Thread.run(Thread.java:745)
Created at:
io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:271)
io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:179)
io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:170)
io.netty.buffer.AbstractByteBufAllocator.ioBuffer(AbstractByteBufAllocator.java:131)
io.netty.channel.DefaultMaxMessagesRecvByteBufAllocator$MaxMessageHandle.allocate(DefaultMaxMessagesRecvByteBufAllocator.java:73)
io.netty.channel.RecvByteBufAllocator$DelegatingHandle.allocate(RecvByteBufAllocator.java:124)
io.netty.channel.epoll.EpollDatagramChannel$EpollDatagramChannelUnsafe.epollInReady(EpollDatagramChannel.java:544)
io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:402)
io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:307)
io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:873)
io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
java.lang.Thread.run(Thread.java:745)
最后一次访问是显式的release()...
我正在使用 Netty 4.1。6.Final。
异常消息指向Netty Wiki。从该信息和跟踪来看，com.example.network.listener.netty.UdpRequestExecutor.channelRead(UdpRequestExecutor.java:71) 处的 buf.retain() 调用似乎是错误的。无论如何，在 GC 时，您的缓冲区引用计数是 > 0。您应该研究示例和责任矩阵才能正确使用引用计数。