错误日志

Buffer has already been freed

2025-11-26 12:31:26 | ERROR | reactor-http-epoll-7 | reactor.core.publisher.Operators | Operator called default onErrorDropped
java.lang.IllegalStateException: UT000091: 2025-11-26 12:31:26 | ERROR | reactor-http-epoll-7 | reactor.core.publisher.Operators | Operator called default onErrorDropped
java.lang.IllegalStateException: UT000091: Buffer has already been freed
        at io.undertow.server.DefaultByteBufferPool$DefaultPooledBuffer.getBuffer(DefaultByteBufferPool.java:260)
        at io.undertow.server.AbstractServerConnection.getExtraBytes(AbstractServerConnection.java:196)
        at io.undertow.conduits.ReadDataStreamSourceConduit.resumeReads(ReadDataStreamSourceConduit.java:89)
        at io.undertow.conduits.FixedLengthStreamSourceConduit.resumeReads(FixedLengthStreamSourceConduit.java:289)
        at org.xnio.conduits.ConduitStreamSourceChannel.resumeReads(ConduitStreamSourceChannel.java:135)
        at io.undertow.server.HttpServerExchange$ReadDispatchChannel.resumeReads(HttpServerExchange.java:2238)
        at org.springframework.http.server.reactive.UndertowServerHttpRequest$RequestBodyPublisher.checkOnDataAvailable(UndertowServerHttpRequest.java:164)
        at org.springframework.http.server.reactive.AbstractListenerReadPublisher.changeToDemandState(AbstractListenerReadPublisher.java:235)
        at org.springframework.http.server.reactive.AbstractListenerReadPublisher.access$1000(AbstractListenerReadPublisher.java:50)
        at org.springframework.http.server.reactive.AbstractListenerReadPublisher$State$2.request(AbstractListenerReadPublisher.java:350)
        at org.springframework.http.server.reactive.AbstractListenerReadPublisher$ReadSubscription.request(AbstractListenerReadPublisher.java:276)
        at reactor.core.publisher.FluxMap$MapSubscriber.request(FluxMap.java:164)
        at reactor.netty.channel.MonoSendMany$SendManyInner.onSubscribe(MonoSendMany.java:254)
        at reactor.core.publisher.FluxMap$MapSubscriber.onSubscribe(FluxMap.java:92)
        at org.springframework.http.server.reactive.AbstractListenerReadPublisher$State$1.subscribe(AbstractListenerReadPublisher.java:318)
        at org.springframework.http.server.reactive.AbstractListenerReadPublisher.subscribe(AbstractListenerReadPublisher.java:109)
        at reactor.core.publisher.FluxSource.subscribe(FluxSource.java:67)
        at reactor.core.publisher.Flux.subscribe(Flux.java:8642)
        at reactor.netty.channel.MonoSendMany.subscribe(MonoSendMany.java:102)
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:240)
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onComplete(MonoIgnoreThen.java:203)
        at reactor.core.publisher.Operators.complete(Operators.java:137)
        at reactor.netty.FutureMono.doSubscribe(FutureMono.java:122)
        at reactor.netty.FutureMono$DeferredFutureMono.subscribe(FutureMono.java:114)
        at reactor.core.publisher.Mono.subscribe(Mono.java:4490)
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:263)
        at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:51)
        at reactor.core.publisher.Mono.subscribe(Mono.java:4490)
        at reactor.netty.NettyOutbound.subscribe(NettyOutbound.java:336)
        at reactor.core.publisher.MonoSource.subscribe(MonoSource.java:69)
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
        at reactor.netty.http.client.HttpClientConnect$HttpIOHandlerObserver.onStateChange(HttpClientConnect.java:445)
        at reactor.netty.ReactorNetty$CompositeConnectionObserver.onStateChange(ReactorNetty.java:707)
        at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.run(DefaultPooledConnectionProvider.java:280)
        at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174)
        at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167)
        at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470)
        at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:403)
        at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
        at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
        at java.base/java.lang.Thread.run(Thread.java:833)
        at io.undertow.server.DefaultByteBufferPool$DefaultPooledBuffer.getBuffer(DefaultByteBufferPool.java:260)
        at io.undertow.server.AbstractServerConnection.getExtraBytes(AbstractServerConnection.java:196)
        at io.undertow.conduits.ReadDataStreamSourceConduit.resumeReads(ReadDataStreamSourceConduit.java:89)
        at io.undertow.conduits.FixedLengthStreamSourceConduit.resumeReads(FixedLengthStreamSourceConduit.java:289)
        at org.xnio.conduits.ConduitStreamSourceChannel.resumeReads(ConduitStreamSourceChannel.java:135)
        at io.undertow.server.HttpServerExchange$ReadDispatchChannel.resumeReads(HttpServerExchange.java:2238)
        at org.springframework.http.server.reactive.UndertowServerHttpRequest$RequestBodyPublisher.checkOnDataAvailable(UndertowServerHttpRequest.java:164)
        at org.springframework.http.server.reactive.AbstractListenerReadPublisher.changeToDemandState(AbstractListenerReadPublisher.java:235)
        at org.springframework.http.server.reactive.AbstractListenerReadPublisher.access$1000(AbstractListenerReadPublisher.java:50)
        at org.springframework.http.server.reactive.AbstractListenerReadPublisher$State$2.request(AbstractListenerReadPublisher.java:350)
        at org.springframework.http.server.reactive.AbstractListenerReadPublisher$ReadSubscription.request(AbstractListenerReadPublisher.java:276)
        at reactor.core.publisher.FluxMap$MapSubscriber.request(FluxMap.java:164)
        at reactor.netty.channel.MonoSendMany$SendManyInner.onSubscribe(MonoSendMany.java:254)
        at reactor.core.publisher.FluxMap$MapSubscriber.onSubscribe(FluxMap.java:92)
        at org.springframework.http.server.reactive.AbstractListenerReadPublisher$State$1.subscribe(AbstractListenerReadPublisher.java:318)
        at org.springframework.http.server.reactive.AbstractListenerReadPublisher.subscribe(AbstractListenerReadPublisher.java:109)
        at reactor.core.publisher.FluxSource.subscribe(FluxSource.java:67)
        at reactor.core.publisher.Flux.subscribe(Flux.java:8642)
        at reactor.netty.channel.MonoSendMany.subscribe(MonoSendMany.java:102)
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:240)
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onComplete(MonoIgnoreThen.java:203)
        at reactor.core.publisher.Operators.complete(Operators.java:137)
        at reactor.netty.FutureMono.doSubscribe(FutureMono.java:122)
        at reactor.netty.FutureMono$DeferredFutureMono.subscribe(FutureMono.java:114)
        at reactor.core.publisher.Mono.subscribe(Mono.java:4490)
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:263)
        at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:51)
        at reactor.core.publisher.Mono.subscribe(Mono.java:4490)
        at reactor.netty.NettyOutbound.subscribe(NettyOutbound.java:336)
        at reactor.core.publisher.MonoSource.subscribe(MonoSource.java:69)
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
        at reactor.netty.http.client.HttpClientConnect$HttpIOHandlerObserver.onStateChange(HttpClientConnect.java:445)
        at reactor.netty.ReactorNetty$CompositeConnectionObserver.onStateChange(ReactorNetty.java:707)
        at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.run(DefaultPooledConnectionProvider.java:280)
        at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174)
        at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167)
        at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470)
        at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:403)
        at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
        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:833)

原因

一个已经被释放（或关闭）的缓冲区（Buffer），在后续的操作中又被尝试访问或使用了。

出现场景

用户发起请求，请求结束前，用户取消了请求。