Netty:Netty 4.0.14中的非法引用计数异常问题？

嗨，我对Netty很陌生，因为我最近刚从一位同事那里接管了Netty定制项目。抱歉，如果以前有人问过这个问题（我已经搜索过了）。我们的Netty版本是

4.0.14

我对

channel.writeAndFlush（response）调用的一小部分不断得到
IllegalReferenceCountException


因此，我在Netty中添加了一些调试打印输出，对于相同的writeAndFlush调用，Netty可能会多次释放（ByteBuf）response.content（）。这是一个在4.0.14之后已经修复的已知问题，还是我用错了？


我的调试输出如下。有四次调用ByteBuf的保留/释放。

发布
（参考CNT 1->0）
，然后是保留
（参考CNT 0->1）
，然后是发布
（1->0）
和发布
（0->-1）
：

1->0| io.netty.buffer.AbstractReferenceCountedByteBuf.release 142|
io.netty.handler.codec.http.DefaultFullHttpResponse.release 79|
io.netty.util.ReferenceCountUtil.release 68|
io.netty.handler.codec.MessageToMessageEncoder.write 91|
io.netty.handler.codec.MessageToMessageCodec.write 116|
io.netty.channel.DefaultChannelHandlerContext.invokeWrite 645|
io.netty.channel.DefaultChannelHandlerContext.write 699|
io.netty.channel.DefaultChannelHandlerContext.write 638|
io.netty.handler.timeout.IdleStateHandler.write 265|
io.netty.channel.DefaultChannelHandlerContext.invokeWrite 645|
io.netty.channel.DefaultChannelHandlerContext.access$2000 29|
io.netty.channel.DefaultChannelHandlerContext$WriteTask.run 906|
io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks 354|
io.netty.channel.nio.NioEventLoop.run 353|
io.netty.util.concurrent.SingleThreadEventExecutor$2.run 101|
java.lang.Thread.run 745

0->1| io.netty.buffer.AbstractReferenceCountedByteBuf.retain 99|
io.netty.buffer.CompositeByteBuf.retain 1570|
io.netty.buffer.CompositeByteBuf.retain 40|
io.netty.handler.codec.http.HttpObjectEncoder.encodeAndRetain 165|
io.netty.handler.codec.http.HttpObjectEncoder.encode 92|
io.netty.handler.codec.MessageToMessageEncoder.write 89|
io.netty.channel.CombinedChannelDuplexHandler.write 193|
io.netty.channel.DefaultChannelHandlerContext.invokeWrite 645|
io.netty.channel.DefaultChannelHandlerContext.write 699|
io.netty.channel.DefaultChannelHandlerContext.write 638|
io.netty.handler.codec.MessageToMessageEncoder.write 115|
io.netty.handler.codec.MessageToMessageCodec.write 116|
io.netty.channel.DefaultChannelHandlerContext.invokeWrite 645|
io.netty.channel.DefaultChannelHandlerContext.write 699|
io.netty.channel.DefaultChannelHandlerContext.write 638|
io.netty.handler.timeout.IdleStateHandler.write 265|
io.netty.channel.DefaultChannelHandlerContext.invokeWrite 645|
io.netty.channel.DefaultChannelHandlerContext.access$2000 29|
io.netty.channel.DefaultChannelHandlerContext$WriteTask.run 906|
io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks 354|
io.netty.channel.nio.NioEventLoop.run 353|
io.netty.util.concurrent.SingleThreadEventExecutor$2.run 101|
java.lang.Thread.run 745

1->0| io.netty.buffer.AbstractReferenceCountedByteBuf.release 142
|io.netty.handler.codec.http.DefaultFullHttpResponse.release 79|
io.netty.util.ReferenceCountUtil.release 68|
io.netty.handler.codec.MessageToMessageEncoder.write 91|
io.netty.channel.CombinedChannelDuplexHandler.write 193|
io.netty.channel.DefaultChannelHandlerContext.invokeWrite 645|
io.netty.channel.DefaultChannelHandlerContext.write 699|
io.netty.channel.DefaultChannelHandlerContext.write 638|
io.netty.handler.codec.MessageToMessageEncoder.write 115|
io.netty.handler.codec.MessageToMessageCodec.write 116|
io.netty.channel.DefaultChannelHandlerContext.invokeWrite 645|
io.netty.channel.DefaultChannelHandlerContext.write 699|
io.netty.channel.DefaultChannelHandlerContext.write 638|
io.netty.handler.timeout.IdleStateHandler.write 265|
io.netty.channel.DefaultChannelHandlerContext.invokeWrite 645|
io.netty.channel.DefaultChannelHandlerContext.access$2000 29|
io.netty.channel.DefaultChannelHandlerContext$WriteTask.run 906|
io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks 354|
io.netty.channel.nio.NioEventLoop.run 353|
io.netty.util.concurrent.SingleThreadEventExecutor$2.run 101|
java.lang.Thread.run 745

0->-1| io.netty.buffer.AbstractReferenceCountedByteBuf.release 142
|io.netty.util.ReferenceCountUtil.release 68|
io.netty.channel.ChannelOutboundBuffer.safeRelease 509|
io.netty.channel.ChannelOutboundBuffer.remove 294|
io.netty.channel.ChannelOutboundBuffer.failFlushed 448|
io.netty.channel.AbstractChannel$abstractsafe.flush0 684|
io.netty.channel.nio.AbstractNioChannel$AbstractNiosafsafe.flush0 271|
io.netty.channel.AbstractChannel$abstractsafe.flush 651|
io.netty.channel.DefaultChannelPipeline$HeadHandler.flush 1038|
io.netty.channel.DefaultChannelHandlerContext.invokeFlush 675|
io.netty.channel.DefaultChannelHandlerContext.flush 656|
io.netty.channel.ChannelOutboundHandlerAdapter.flush 115|
io.netty.channel.CombinedChannelDuplexHandler.flush 198|
io.netty.channel.DefaultChannelHandlerContext.invokeFlush 675|
io.netty.channel.DefaultChannelHandlerContext.flush 656|
io.netty.channel.ChannelDuplexHandler.flush 117|
io.netty.channel.DefaultChannelHandlerContext.invokeFlush 675|
io.netty.channel.DefaultChannelHandlerContext.flush 656|
io.netty.channel.ChannelDuplexHandler.flush 117|
io.netty.channel.DefaultChannelHandlerContext.invokeFlush 675|
io.netty.channel.DefaultChannelHandlerContext.access$160029|
io.netty.channel.DefaultChannelHandlerContext$WriteTask.run 908|
io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks 354|
io.netty.channel.nio.NioEventLoop.run 353|
io.netty.util.concurrent.SingleThreadEventExecutor$2.run 101|
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