netty偶尔会出现ResourceLeakException

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netty偶尔会出现ResourceLeakException0

请教一下，netty为什么偶尔会出现ResourceLeakException异常

[WARN,ResourceLeakDetector,nioEventLoopGroup-3-2] LEAK: ByteBuf was GC'd before being released correctly.  The following stack trace shows where the leaked object was created, rather than where you failed to release it.
io.netty.util.ResourceLeakException: io.netty.buffer.CompositeByteBuf@72828ebf
	at io.netty.util.ResourceLeakDetector$DefaultResourceLeak.<init>(ResourceLeakDetector.java:175)
	at io.netty.util.ResourceLeakDetector.open(ResourceLeakDetector.java:117)
	at io.netty.buffer.CompositeByteBuf.<init>(CompositeByteBuf.java:59)
	at io.netty.buffer.Unpooled.compositeBuffer(Unpooled.java:353)
	at io.netty.handler.codec.http.HttpObjectAggregator.decode(HttpObjectAggregator.java:138)
	at io.netty.handler.codec.http.HttpObjectAggregator.decode(HttpObjectAggregator.java:50)
	at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:89)
	at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:338)
	at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:324)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:153)
	at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:338)
	at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:324)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:122)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:485)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:452)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:346)
	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101)
	at java.lang.Thread.run(Unknown Source)