netty memory leak in spring-cloud-gateway

[kiidgajdekk]

1、environment: java 8,netty 4.1.51.Final,spring-cloud-gateway 2.2.6-RELEASE
2、stack trace:
io.netty.util.ResourceLeakDetector : LEAK: ByteBuf.release() was not called before it's garbage-collected. See https://netty.io/wiki/reference-counted-objects.html for more information.Recent access records: #1:io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:285)io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:792)io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe$1.run(AbstractEpollChannel.java:387)io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:384)io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)java.lang.Thread.run(Thread.java:748)#2:io.netty.buffer.AdvancedLeakAwareByteBuf.forEachByte(AdvancedLeakAwareByteBuf.java:670)io.netty.handler.codec.http.HttpObjectDecoder$HeaderParser.parse(HttpObjectDecoder.java:940)io.netty.handler.codec.http.HttpObjectDecoder.readHeaders(HttpObjectDecoder.java:616)io.netty.handler.codec.http.HttpObjectDecoder.decode(HttpObjectDecoder.java:258)io.netty.handler.codec.http.HttpServerCodec$HttpServerRequestDecoder.decode(HttpServerCodec.java:123)io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:501)io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:440)io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:792)io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:475)io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)java.lang.Thread.run(Thread.java:748)#3:io.netty.buffer.AdvancedLeakAwareByteBuf.forEachByte(AdvancedLeakAwareByteBuf.java:670)io.netty.handler.codec.http.HttpObjectDecoder$HeaderParser.parse(HttpObjectDecoder.java:940)io.netty.handler.codec.http.HttpObjectDecoder.readHeaders(HttpObjectDecoder.java:596)io.netty.handler.codec.http.HttpObjectDecoder.decode(HttpObjectDecoder.java:258)io.netty.handler.codec.http.HttpServerCodec$HttpServerRequestDecoder.decode(HttpServerCodec.java:123)io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:501)io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:440)io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:792)io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:475)io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)java.lang.Thread.run(Thread.java:748)#4:io.netty.buffer.AdvancedLeakAwareByteBuf.forEachByte(AdvancedLeakAwareByteBuf.java:670)io.netty.handler.codec.http.HttpObjectDecoder$HeaderParser.parse(HttpObjectDecoder.java:940)io.netty.handler.codec.http.HttpObjectDecoder$LineParser.parse(HttpObjectDecoder.java:996)io.netty.handler.codec.http.HttpObjectDecoder.decode(HttpObjectDecoder.java:239)io.netty.handler.codec.http.HttpServerCodec$HttpServerRequestDecoder.decode(HttpServerCodec.java:123)io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:501)io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:440)io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:792)io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:475)io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)java.lang.Thread.run(Thread.java:748)#5:Hint: 'reactor.left.httpCodec' will handle the message from this point.io.netty.channel.DefaultChannelPipeline.touch(DefaultChannelPipeline.java:116)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:792)io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:475)io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)java.lang.Thread.run(Thread.java:748)#6:Hint: 'DefaultChannelPipeline$HeadContext#0' will handle the message from this point.io.netty.channel.DefaultChannelPipeline.touch(DefaultChannelPipeline.java:116)io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:792)io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:475)io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)java.lang.Thread.run(Thread.java:748)Created at:io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:363)io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:187)io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:178)io.netty.channel.unix.PreferredDirectByteBufAllocator.ioBuffer(PreferredDirectByteBufAllocator.java:53)io.netty.channel.DefaultMaxMessagesRecvByteBufAllocator$MaxMessageHandle.allocate(DefaultMaxMessagesRecvByteBufAllocator.java:114)io.netty.channel.epoll.EpollRecvByteAllocatorHandle.allocate(EpollRecvByteAllocatorHandle.java:75)io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:777)io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:475)io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)java.lang.Thread.run(Thread.java:748): 1 leak records were discarded because they were duplicates: 40 leak records were discarded because the leak record count is targeted to 4. Use system property io.netty.leakDetection.targetRecords to increase the limit.

[normanmaurer]

This means you did not call release()