我有一个服务将数据流式传输到第二个服务，该服务接收对象流并将它们保存到我的 MongoDB 中。在从流服务获取的 Flux 对象的订阅函数中，我使用 ReactiveMongoRepository 接口中的 save 方法。当我尝试使用块函数并获取数据时，出现以下错误：
2019-10-11 13:30:38.559 INFO 19584 --- [localhost:27017] org.mongodb.driver.connection : Opened connection [connectionId{localValue:1, serverValue:25}] to localhost:27017
2019-10-11 13:30:38.566 INFO 19584 --- [localhost:27017] org.mongodb.driver.cluster : Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 1]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=6218300}
2019-10-11 13:30:39.158 INFO 19584 --- [ctor-http-nio-4] quote-monitor-service : onNext(Quote(id=null, ticker=AAPL, price=164.8, instant=2019-10-11T10:30:38.800Z))
2019-10-11 13:30:39.411 INFO 19584 --- [ctor-http-nio-4] quote-monitor-service : cancel()
2019-10-11 13:30:39.429 INFO 19584 --- [ntLoopGroup-2-2] org.mongodb.driver.connection : …