Memory LEAK of quickstart example

[lavender-lee]

When I start the example of quickstart and test it via JMeter 5000 times, then I got the following error :

23:58:51.961 [nioEventLoopGroup-3-1] [] ERROR io.netty.util.ResourceLeakDetector  - LEAK: ByteBuf.release() was not called before it's garbage-collected. Enable advanced leak reporting to find out where the leak occurred. To enable advanced leak reporting, specify the JVM option '-Dio.netty.leakDetectionLevel=advanced' or call ResourceLeakDetector.setLevel()

so I add the JVM option -Dio.netty.leakDetectionLevel=advanced, then restarts this example

00:07:38.225 [nioEventLoopGroup-3-8] [] ERROR io.netty.util.ResourceLeakDetector  - LEAK: ByteBuf.release() was not called before it's garbage-collected.
Recent access records: 0
Created at:
	io.netty.buffer.CompositeByteBuf.<init>(CompositeByteBuf.java:59)
	io.netty.buffer.AbstractByteBufAllocator.compositeDirectBuffer(AbstractByteBufAllocator.java:191)
	io.netty.buffer.AbstractByteBufAllocator.compositeBuffer(AbstractByteBufAllocator.java:169)
	io.netty.handler.codec.http.HttpObjectAggregator.decode(HttpObjectAggregator.java:149)
	io.netty.handler.codec.http.HttpObjectAggregator.decode(HttpObjectAggregator.java:54)
	io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:89)
	io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
	io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
	io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:163)
	io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
	io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
	io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:787)
	io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:130)
	io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
	io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
	io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
	io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
	io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
	io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
	java.lang.Thread.run(Thread.java:748)