您好，我在为 Kafka 安装 elasticsearch 连接器时遇到了问题。我听过这个教程：https://sematext.com/blog/kafka-connect-elasticsearch-how-to/
我尝试在独立模式下启动连接器时的错误是：
(org.apache.kafka.connect.cli.ConnectStandalone:74)
Exception in thread "main" java.lang.NoSuchMethodError: com.google.common.collect.Sets$SetView.iterator()Lcom/google/common/collect/UnmodifiableIterator;
at org.reflections.Reflections.expandSuperTypes(Reflections.java:380)
at org.reflections.Reflections.<init>(Reflections.java:126)
at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader.scanPluginPath(DelegatingClassLoader.java:263)
at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader.scanUrlsAndAddPlugins(DelegatingClassLoader.java:206)
at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader.initPluginLoader(DelegatingClassLoader.java:154)
at org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader.initLoaders(DelegatingClassLoader.java:147)
at org.apache.kafka.connect.runtime.isolation.Plugins.<init>(Plugins.java:47)
at org.apache.kafka.connect.cli.ConnectStandalone.main(ConnectStandalone.java:75)
我使用 AWS EC2 小实例来测试此连接器。
我该如何解决这个错误？