Análisis de excepción de ConcurrentModification encontrado al usar spring-cloud-gateway y nacos
reactor.core.Exceptions$ErrorCallbackNotImplemented: java.util.ConcurrentModificationException
Caused by: java.util.ConcurrentModificationException: null
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909)
at java.util.ArrayList$Itr.next(ArrayList.java:859)
at reactor.core.publisher.FluxIterable$IterableSubscription.poll(FluxIterable.java:389)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.drainLoop(FluxFlatMap.java:634)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.drain(FluxFlatMap.java:540)
at reactor.core.publisher.FluxFlatMap$FlatMapInner.onSubscribe(FluxFlatMap.java:924)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:139)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:63)
at reactor.core.publisher.Flux.subscribe(Flux.java:7777)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onNext(FluxFlatMap.java:389)
at reactor.core.publisher.FluxIterable$IterableSubscription.slowPath(FluxIterable.java:243)
at reactor.core.publisher.FluxIterable$IterableSubscription.request(FluxIterable.java:201)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onSubscribe(FluxFlatMap.java:335)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:139)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:63)
at reactor.core.publisher.FluxFlatMap.subscribe(FluxFlatMap.java:97)
at reactor.core.publisher.FluxMap.subscribe(FluxMap.java:62)
at reactor.core.publisher.FluxMap.subscribe(FluxMap.java:62)
at reactor.core.publisher.Flux.subscribe(Flux.java:7777)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onNext(FluxFlatMap.java:389)
at reactor.core.publisher.FluxIterable$IterableSubscription.slowPath(FluxIterable.java:243)
at reactor.core.publisher.FluxIterable$IterableSubscription.request(FluxIterable.java:201)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onSubscribe(FluxFlatMap.java:335)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:139)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:63)
at reactor.core.publisher.FluxFlatMap.subscribe(FluxFlatMap.java:97)
at reactor.core.publisher.MonoCollectList.subscribe(MonoCollectList.java:59)
at reactor.core.publisher.MonoMapFuseable.subscribe(MonoMapFuseable.java:59)
at reactor.core.publisher.MonoFlattenIterable.subscribe(MonoFlattenIterable.java:101)
at reactor.core.publisher.FluxMaterialize.subscribe(FluxMaterialize.java:40)
at reactor.core.publisher.MonoCollectList.subscribe(MonoCollectList.java:59)
at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:74)
at reactor.core.publisher.MonoFlattenIterable.subscribe(MonoFlattenIterable.java:101)
at reactor.core.publisher.FluxDematerialize.subscribe(FluxDematerialize.java:39)
at reactor.core.publisher.FluxDefer.subscribe(FluxDefer.java:54)
at reactor.core.publisher.Flux.subscribe(Flux.java:7777)
at reactor.core.publisher.Flux.subscribeWith(Flux.java:7941)
at reactor.core.publisher.Flux.subscribe(Flux.java:7770)
at reactor.core.publisher.Flux.subscribe(Flux.java:7734)
at reactor.core.publisher.Flux.subscribe(Flux.java:7652)
at org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter.lambda$onApplicationEvent$0(WeightCalculatorWebFilter.java:133)
at org.springframework.beans.factory.ObjectProvider.ifAvailable(ObjectProvider.java:93)
at org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter.onApplicationEvent(WeightCalculatorWebFilter.java:133)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
at org.springframework.cloud.gateway.route.RouteRefreshListener.reset(RouteRefreshListener.java:68)
at org.springframework.cloud.gateway.route.RouteRefreshListener.resetIfNeeded(RouteRefreshListener.java:63)
at org.springframework.cloud.gateway.route.RouteRefreshListener.onApplicationEvent(RouteRefreshListener.java:57)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
at org.springframework.cloud.alibaba.nacos.discovery.NacosWatch.lambda$nacosServicesWatch$0(NacosWatch.java:156)
at com.alibaba.nacos.client.naming.core.EventDispatcher$Notifier.run(EventDispatcher.java:128)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Después de buscar el problema durante mucho tiempo, finalmente encontré la respuesta en el artículo de un tipo grande:
Resuelve el problema.