zengxiaowengit opened a new issue #3037: spring cloud gateway 2.0.x exception URL: https://github.com/apache/skywalking/issues/3037 Please answer these questions before submitting your issue. - Why do you submit this issue? - [ ] Question or discussion - [x] Bug - [ ] Requirement - [ ] Feature or performance improvement ___ ### Question - What do you want to know? How to fix this bug? is this version skywalking cannot supported? OR now which spring cloud version is supported so I can switch to. ___ ### Bug - Which version of SkyWalking, OS and JRE? SkyWalking version: 6.2.0 OS: ubuntu 16.04 jre: oracle jre-8u161-linux-x64 spring-cloud-dependencies: Greenwich.RELEASE spring-cloud-starter-gateway: 2.1.0.RELEASE ( depend on spring-boot-starter-webflux ) - Which company or project? Guo Tai Jun An Futures. - What happen? when I start project, many warn Exception occured like this: > java.lang.IllegalStateException: Cannot resolve type description for javax.servlet.http.HttpServlet the first trace print this Exception: > ERROR 2019-07-10 02:50:52:881 reactor-http-epoll-6 InstMethodsInter : class[class reactor.netty.http.client.HttpClientOperations] before method[send] intercept failure java.lang.IllegalArgumentException: ContextSnapshot can't be null. at org.apache.skywalking.apm.agent.core.context.ContextManager.continued(ContextManager.java:145) at org.apache.skywalking.apm.plugin.spring.cloud.gateway.v2.HttpClientOperationsSendInterceptor.beforeMethod(HttpClientOperationsSendInterceptor.java:59) at org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstMethodsInter.intercept(InstMethodsInter.java:82) at reactor.netty.http.client.HttpClientOperations.send(HttpClientOperations.java) at org.springframework.http.client.reactive.ReactorClientHttpRequest.lambda$writeWith$0(ReactorClientHttpRequest.java:87) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1374) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) at org.springframework.http.client.reactive.AbstractClientHttpRequest.doCommit(AbstractClientHttpRequest.java:133) at org.springframework.http.client.reactive.ReactorClientHttpRequest.writeWith(ReactorClientHttpRequest.java:83) at org.springframework.http.codec.FormHttpMessageWriter.lambda$write$0(FormHttpMessageWriter.java:139) at reactor.core.publisher.FluxFlatMap.trySubscribeScalarMap(FluxFlatMap.java:141) at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:53) at reactor.core.publisher.Mono.subscribe(Mono.java:3710) at reactor.core.publisher.FluxFlatMap.trySubscribeScalarMap(FluxFlatMap.java:169) at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:53) at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) at reactor.netty.http.client.HttpClientConnect$HttpIOHandlerObserver.onStateChange(HttpClientConnect.java:441) at reactor.netty.ReactorNetty$CompositeConnectionObserver.onStateChange(ReactorNetty.java:470) at reactor.netty.resources.PooledConnectionProvider$DisposableAcquire.onStateChange(PooledConnectionProvider.java:515) at reactor.netty.resources.PooledConnectionProvider$DisposableAcquire.run(PooledConnectionProvider.java:544) at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:405) at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:338) at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:906) at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) at java.lang.Thread.run(Thread.java:745) And only the first request trace item can be sent to oap server, then oap server can not receive trace any more. the detail log please see the attatchment. [skywalking-api.log](https://github.com/apache/skywalking/files/3375583/skywalking-api.log) ___ ### Requirement or improvement - could you provide the supported version of webflux or gateway version? Thanks a lot.
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