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Samebug tips

  1. ,
    Expert tip

    A few things cause this exception:
    1) Check if you have all jars and if they're in the correct path.
    2) Your classpath might be broken, you can define it in the command line with java -cp yourClassPath or at your IDE if you're using one.

  2. ,

    you can change your scala version to 2.11.11

Solutions on the web

via Spring JIRA by Brian Clozel, 1 year ago
java.lang.ClassNotFoundException: javax.servlet.ServletRequest	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)	at org.springframework.web.reactive.accept.PathExtensionContentTypeResolver.extractKey(PathExtensionContentTypeResolver.java:89)	at org.springframework.web.reactive.accept.AbstractMappingContentTypeResolver.resolveMediaTypes(AbstractMappingContentTypeResolver.java:91)	at org.springframework.web.reactive.accept.CompositeContentTypeResolver.resolveMediaTypes(CompositeContentTypeResolver.java:77)	at org.springframework.web.reactive.result.ContentNegotiatingResultHandlerSupport.getAcceptableTypes(ContentNegotiatingResultHandlerSupport.java:130)	at org.springframework.web.reactive.result.ContentNegotiatingResultHandlerSupport.selectMediaType(ContentNegotiatingResultHandlerSupport.java:102)	at org.springframework.web.reactive.result.method.annotation.AbstractMessageConverterResultHandler.writeBody(AbstractMessageConverterResultHandler.java:118)	at org.springframework.web.reactive.result.method.annotation.ResponseBodyResultHandler.handleResult(ResponseBodyResultHandler.java:119)	at org.springframework.web.reactive.DispatcherHandler.handleResult(DispatcherHandler.java:126)	at org.springframework.web.reactive.DispatcherHandler.lambda$handle$2(DispatcherHandler.java:113)	at reactor.core.publisher.MonoThenApply$MonoThenApplyManager.onNext(MonoThenApply.java:99)	at reactor.core.publisher.Operators$DeferredScalarSubscriber.complete(Operators.java:796)	at reactor.core.publisher.MonoThenApply$MonoThenApplyManager$SecondSubscriber.onNext(MonoThenApply.java:204)	at reactor.core.publisher.FluxResume$ResumeSubscriber.onNext(FluxResume.java:75)	at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:131)	at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:1292)	at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:187)	at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:1009)	at reactor.core.publisher.FluxResume$ResumeSubscriber.onSubscribe(FluxResume.java:70)	at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:100)	at reactor.core.publisher.FluxFlatMap.trySubscribeScalarMap(FluxFlatMap.java:172)	at reactor.core.publisher.MonoThenApply.subscribe(MonoThenApply.java:51)	at reactor.core.publisher.MonoMapFuseable.subscribe(MonoMapFuseable.java:69)	at reactor.core.publisher.MonoOtherwise.subscribe(MonoOtherwise.java:47)	at reactor.core.publisher.MonoThenApply$MonoThenApplyManager.onNext(MonoThenApply.java:133)	at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:71)	at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:82)	at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:391)	at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:192)	at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:95)	at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:59)	at reactor.core.publisher.FluxConcatMap.subscribe(FluxConcatMap.java:116)	at reactor.core.publisher.MonoNext.subscribe(MonoNext.java:45)	at reactor.core.publisher.MonoOtherwiseIfEmpty.subscribe(MonoOtherwiseIfEmpty.java:47)	at reactor.core.publisher.MonoThenApply.subscribe(MonoThenApply.java:58)	at reactor.core.publisher.MonoThenApply.subscribe(MonoThenApply.java:58)	at reactor.core.publisher.MonoOtherwise.subscribe(MonoOtherwise.java:47)	at reactor.core.publisher.MonoOtherwise.subscribe(MonoOtherwise.java:47)	at reactor.core.publisher.MonoOtherwise.subscribe(MonoOtherwise.java:47)	at reactor.core.publisher.MonoThenSupply$MonoConcatIgnoreManager.drain(MonoThenSupply.java:169)	at reactor.core.publisher.MonoThenSupply.subscribe(MonoThenSupply.java:55)	at reactor.io.netty.http.NettyHttpServerHandler.channelRead(NettyHttpServerHandler.java:91)	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:372)	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:358)	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:350)	at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:435)	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293)	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:267)	at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:250)	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:372)	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:358)	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:350)	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334)	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:372)	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:358)	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926)	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:123)	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:571)	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:512)	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:426)	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:398)	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:877)	at java.lang.Thread.run(Thread.java:745)