IllegalReferenceCountException: refCnt: 0, decrement: 1

IllegalReferenceCountException: refCnt: 0, decrement: 1

记录一次线上报错：IllegalReferenceCountException: refCnt: 0, decrement: 1

2021-12-28 16:00:46,606 [reactor-http-epoll-8 ] WARN  r.n.h.c.HttpClientConnect - [id: 0x2543b1a8, L:/192.168.0.1:123456- R:yuming.yuming.com/127.0.0.1:80] The connection observed an error
io.netty.handler.codec.EncoderException: io.netty.util.IllegalReferenceCountException: refCnt: 0, decrement: 1
	at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:104)
	at io.netty.channel.CombinedChannelDuplexHandler.write(CombinedChannelDuplexHandler.java:346)
	at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717)
	at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709)
	at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:792)
	at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:702)
	at reactor.netty.channel.MonoSendMany$SendManyInner.run(MonoSendMany.java:317)
	at reactor.netty.channel.MonoSendMany$SendManyInner.trySchedule(MonoSendMany.java:419)
	at reactor.netty.channel.MonoSendMany$SendManyInner.onNext(MonoSendMany.java:219)
	at org.springframework.cloud.sleuth.instrument.reactor.ScopePassingSpanSubscriber.onNext(ScopePassingSpanSubscriber.java:90)
	at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:121)
	at org.springframework.cloud.sleuth.instrument.reactor.ScopePassingSpanSubscriber.onNext(ScopePassingSpanSubscriber.java:90)
	at reactor.core.publisher.FluxContextStart$ContextStartSubscriber.onNext(FluxContextStart.java:96)
	at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2393)
	at reactor.core.publisher.FluxContextStart$ContextStartSubscriber.request(FluxContextStart.java:125)
	at org.springframework.cloud.sleuth.instrument.reactor.ScopePassingSpanSubscriber.request(ScopePassingSpanSubscriber.java:76)
	at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:162)
	at org.springframework.cloud.sleuth.instrument.reactor.ScopePassingSpanSubscriber.request(ScopePassingSpanSubscriber.java:76)
	at reactor.netty.channel.MonoSendMany$SendManyInner.onSubscribe(MonoSendMany.java:250)
	at org.springframework.cloud.sleuth.instrument.reactor.ScopePassingSpanSubscriber.onSubscribe(ScopePassingSpanSubscriber.java:69)
--
	at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireExceptionCaught(CombinedChannelDuplexHandler.java:424)
	at io.netty.channel.ChannelHandlerAdapter.exceptionCaught(ChannelHandlerAdapter.java:92)
	at io.netty.channel.CombinedChannelDuplexHandler.fireExceptionCaught(CombinedChannelDuplexHandler.java:145)
	at io.netty.channel.ChannelInboundHandlerAdapter.exceptionCaught(ChannelInboundHandlerAdapter.java:143)
	at io.netty.channel.CombinedChannelDuplexHandler.exceptionCaught(CombinedChannelDuplexHandler.java:231)
	at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:302)
	at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:281)
	at io.netty.channel.AbstractChannelHandlerContext.fireExceptionCaught(AbstractChannelHandlerContext.java:273)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.exceptionCaught(DefaultChannelPipeline.java:1377)
	at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:302)
	at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:281)
	at io.netty.channel.DefaultChannelPipeline.fireExceptionCaught(DefaultChannelPipeline.java:907)
	at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.handleReadException(AbstractEpollStreamChannel.java:728)
	at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:821)
	at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:480)
	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)
	at io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:989)
	at io.netty.util.internal.ThreadExecutorMap.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.lang.Thread.run(Thread.java:745)
Caused by: io.netty.util.IllegalReferenceCountException: refCnt: 0, decrement: 1
	at io.netty.util.internal.ReferenceCountUpdater.toLiveRealRefCnt(ReferenceCountUpdater.java:74)
	at io.netty.util.internal.ReferenceCountUpdater.release(ReferenceCountUpdater.java:138)
	at io.netty.buffer.AbstractReferenceCountedByteBuf.release(AbstractReferenceCountedByteBuf.java:100)
	at io.netty.util.ReferenceCountUtil.release(ReferenceCountUtil.java:88)
	at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:91)

直接上解决方案：

注销掉释放内存的代码

//释放掉内存

//DataBufferUtils.release(buffer);

参考文章：

那些年我们一起踩过的Spring Cloud Gateway获取body的那些坑 - 天马行空~_~ - 博客园

Netty io.netty.util.IllegalReferenceCountException: refCnt: 0 问题解决_潘建南的博客-CSDN博客