老师 reactive是支持Repository的 可以继承ReactiveMongoRepository 另外老师可以讲一些使用场景方面的吗，WebFlux适合什么，如果用来开发Web好像和Serverlet没多大区别，有没有现有的应用使用WebFlux开发的 谢谢老师

没听过reactive访问数据库，也不知道有啥用。早就想要知道了，老师居然在最后才说，哈哈。此外，reactive方式会不会造成新的安全问题？

之前都没有接触过reactive，老师有没有其他资料可以分享学习的呢

老师我这里出现了很诡异的情况，我模仿您把decreaseHighPrice放在startFromInsertion的外面执行程序的时候，Result is AcknowledgedUpdateResult确实是先输出了，但是输出为 Result is AcknowledgedUpdateResult{matchedCount=1, modifiedCount=1, upsertedId=null} 去MongoDB里查看，发现latte的修改时间比创建时间早一秒，金额改成25块了 这是因为什么原因造成的呢？麻烦您了

結合Spring Kafka做了一個小demo，需求是從特定的topic拿到數據並且逐一插入mongoDB，使用了reactiveMongoTemplate，但是會經常出現too many operations are already waiting for connection錯誤，這種情況要如何解決？

我的docker里面mongo服务是正常的！第四章的mongo例子都执行成功了！

您好，我执行本节的例子： startFromInsertion(() -> log.info("Runnable")); log.info("after starting"); 但抛出下面的异常，请问这是什么原因造成的？： ... 2019-06-03 17:59:02.327 INFO 2140 --- [ Thread-11] org.mongodb.driver.connection : Closed connection [connectionId{localValue:3}] to localhost:27017 because there was a socket exception raised by this connection. 2019-06-03 17:59:02.327 INFO 2140 --- [ elastic-2] g.s.d.r.m.MongodbDemoApplication : Finnally 1, onError

2019-06-03 17:59:02.038 INFO 2140 --- [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, 10]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=1463750} 2019-06-03 17:59:02.200 INFO 2140 --- [ main] g.s.d.r.m.MongodbDemoApplication : Started MongodbDemoApplication in 1.508 seconds (JVM running for 2.266) 2019-06-03 17:59:02.299 INFO 2140 --- [ main] g.s.d.r.m.MongodbDemoApplication : after starting 2019-06-03 17:59:02.327 INFO 2140 --- [ Thread-11] org.mongodb.driver.connection : Closed connection [connectionId{localValue:3}] to localhost:27017 because there was a socket exception raised by this connection. 2019-06-03 17:59:02.327 INFO 2140 --- [ elastic-2] g.s.d.r.m.MongodbDemoApplication : Finnally 1, onError