问题: 为cdh新增节点时,在分配datanode后,启动报错 Can't open /iot/opt/cloudera-manager/cm-5.11.2/run/cloudera-scm-agent/process/642-hdfs-DATANODE/config.zip: 权限不够. Can't open /iot/opt/cloudera-manager/cm-5.11.2/run/cloudera-scm-agent/process/642-hdfs-DATANODE/proc.jso
一个常见的问题:格式化namenode,造成无法启动datanode的问题. 问题描述: 无法启动datanode,查看日志,datanote尝试n次启动无效后,会出现这个语句 INFO org.apache.hadoop.ipc.RPC: Server at localhost/127.0.0.1:9000 not available yet, Zzzzz... 解决办法: 1.先清空tmp目录下的所有文件.因为每次namenode format会重新创建一个namen