NoHostAvailableException: All host(s) tried for query failed (no host was tried)，

NoHostAvailableException: All host(s) tried for query failed (no host was tried)

cassandra连接报错：tried：localhost 127 0 0 1：9042

去除这个依赖即可，也有可能是版本高了。

<dependency> <groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-cassandra</artifactId>
</dependency>