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$1.fireExceptionCaught(CombinedChannelDuplexHandler.java:145) at io.netty.channel.ChannelInboundHandlerAdapter.exceptionCaught(ChannelInboundHandlerAdapter.java:143) at io.netty.channel.CombinedChannelDuplexHandler.exceptionCaught(CombinedChannelDuplexHandler.java:231) at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:302) at io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:281) at io.netty.channel.AbstractChannelHandlerContext.fireExceptionCaught(AbstractChannelHandlerContext.java:273) at io.netty.channel.DefaultChannelPipeline$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$4.run(SingleThreadEventExecutor.java:989) at io.netty.util.internal.ThreadExecutorMap$2.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
