1.Exception in thread "main" java.lang.NoSuchMethodError: scala.collection.immutable.HashSet$.empty()Lscala/collection/immutable/HashSet;
pom导入这个依赖
<dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.4.4</version> </dependency>
刷新maven
更改scala版本
2.无法消费nc的数据,连不上
检测防火墙,2种防火墙都要检查,centos7检测firewall,centos7以下检测 iptables