修改配置文件
1.druid.host=cdhpreview01(当前机器host ,不能为localhost 因为多个节点之前都是localhost无法识别)
2.druid.extensions.loadList=["druid-parquet-extensions", "mysql-metadata-storage","druid-hdfs-storage", "druid-kafka-indexing-service", "druid-datasketches"] 增加"druid-parquet-extensions", "mysql-metadata-storage" 增加对parquet 和mysql的支持
3.将hadoop 的配置文件 core-site.xml hdfs-site.xml 等文件拷贝至 conf/druid/cluster/_common/
4.依次启动master server ,data server ,Query Server