Java 调试IllegalReferenceCountException:refCnt:0，减量：1

我有个问题要问。有没有一个好的技巧/简单的方法来调试异常，使用

非法引用countexception:refCnt:0，减量：1

。我尝试了很多方法来调试它，但是没有找到一个很好的解决方案。我想知道是否有一些配置更改（除了在日志记录中启用

DEBUG

，它没有太多有用的信息）或一些代码更改，我可以更新以启用此类Netty异常的更多调试信息

Java代码

WebClient.Builder webClientBuilder=WebClient.Builder（）；
if（端点需要代理包含（端点））{
反应器客户端TTP连接器proxyConnector=
新的ReactorClientHttpConnector（proxyHTTPClient）；
webClientBuilder.clientConnector（proxyConnector）；
}
返回请求bodyspec
.header（“内容类型”，header\u值\u内容\u类型）
.body（Mono.just（requestBody），requestBodyClass）
.retrieve（）
.bodyToMono（String.class）
.timeout（持续时间为.ofmills（alloyConfig.GetTimeoutInmillizes（）））
.block（）；

环境

• 使用的反应器版本：

  • org.projectreactor:reactor spring:1.0.1.发布

  • org.springframework.boot'version'2.3.4.RELEASE

  • io.spring.dependency management“版本”1.0.9.发行版

• JVM版本（

  java-version

  ）：

• 操作系统和版本（例如

  uname-a

  ）：

  Darwin19.6.0达尔文内核版本19.6.0:Thu Oct 29 22:56:45 PDT 2020；根目录：xnu-6153.141.2.2~1/发行版\u X86\u 64 X86\u 64

---

我认为这个错误是由spring框架团队报告并解决的。检查

或

您可以在属性文件中添加

codec

属性

spring
  codec:
    max-in-memory-size: 10MB

---

我认为这在服务器端是有效的，但我的错误发生在客户端，也许这是一种更好的方法？

2020-12-11 00:29:12.498 ERROR 11918 --- [ctor-http-nio-2] r.n.channel.ChannelOperationsHandler     : [id: 0xebbe5eff, L:0.0.0.0/0.0.0.0:55189] Error was received while reading the incoming data. The connection will be closed.

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.handler.codec.http.DefaultHttpContent.release(DefaultHttpContent.java:92)
        at io.netty.util.ReferenceCountUtil.release(ReferenceCountUtil.java:88)
        at reactor.netty.channel.FluxReceive.onInboundNext(FluxReceive.java:340)
        at reactor.netty.channel.ChannelOperations.onInboundNext(ChannelOperations.java:358)
        at reactor.netty.http.client.HttpClientOperations.onInboundNext(HttpClientOperations.java:647)
        at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:96)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
        at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
        at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324)
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296)
        at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
        at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1526)
        at io.netty.handler.ssl.SslHandler.decodeNonJdkCompatible(SslHandler.java:1287)
        at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1324)
        at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:501)
        at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:440)
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
        at io.netty.handler.proxy.ProxyHandler.channelRead(ProxyHandler.java:253)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
        at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
        at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:253)
        at io.netty.handler.proxy.HttpProxyHandler$HttpClientCodecWrapper.channelRead(HttpProxyHandler.java:272)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
        at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
        at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
        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.base/java.lang.Thread.run(Thread.java:834)

2020-12-11 00:29:12.498 [reactor-http-nio-2] ERROR r.n.channel.ChannelOperationsHandler - [id: 0xebbe5eff, L:0.0.0.0/0.0.0.0:55189] Error was received while reading the incoming data. The connection will be closed.
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.handler.codec.http.DefaultHttpContent.release(DefaultHttpContent.java:92)
        at io.netty.util.ReferenceCountUtil.release(ReferenceCountUtil.java:88)
        at reactor.netty.channel.FluxReceive.onInboundNext(FluxReceive.java:340)
        at reactor.netty.channel.ChannelOperations.onInboundNext(ChannelOperations.java:358)
        at reactor.netty.http.client.HttpClientOperations.onInboundNext(HttpClientOperations.java:647)
        at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:96)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
        at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
        at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324)
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296)
        at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
        at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1526)
        at io.netty.handler.ssl.SslHandler.decodeNonJdkCompatible(SslHandler.java:1287)
        at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1324)
        at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:501)
        at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:440)
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
        at io.netty.handler.proxy.ProxyHandler.channelRead(ProxyHandler.java:253)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
        at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
        at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:253)
        at io.netty.handler.proxy.HttpProxyHandler$HttpClientCodecWrapper.channelRead(HttpProxyHandler.java:272)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
        at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
        at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
        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.base/java.lang.Thread.run(Thread.java:834)

spring
  codec:
    max-in-memory-size: 10MB