我安装了Cloudera Manager 5.13。
第一次安装并运行时YARN ..我遇到以下错误
Error starting JobHistoryServer
org.apache.hadoop.yarn.exceptions.YarnRuntimeException: Error creating done directory: [hdfs://vmi150132.contaboserver.net:8020/user/history/done]
at org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager.tryCreatingHistoryDirs(HistoryFileManager.java:682)
at org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager.createHistoryDirs(HistoryFileManager.java:618)
at org.apache.hadoop.mapreduce.v2.hs.HistoryFileManager.serviceInit(HistoryFileManager.java:579)
at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
at org.apache.hadoop.mapreduce.v2.hs.JobHistory.serviceInit(JobHistory.java:95)
at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
at org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:107)
at org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer.serviceInit(JobHistoryServer.java:154)
at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
at org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer.launchJobHistoryServer(JobHistoryServer.java:229)
at org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer.main(JobHistoryServer.java:239)
Caused by: org.apache.hadoop.security.AccessControlException: Permission denied: user=mapred, access=WRITE, inode="/":hdfs:supergroup:drwxr-xr-x
at org.apache.hadoop.hdfs.server.namenode.DefaultAuthorizationProvider.checkFsPermission(DefaultAuthorizationProvider.java:279)
at org.apache.hadoop.hdfs.server.namenode.DefaultAuthorizationProvider.check(DefaultAuthorizationProvider.java:260)
at org.apache.hadoop.hdfs.server.namenode.DefaultAuthorizationProvider.check(DefaultAuthorizationProvider.java:240)
[....和其他行的堆栈异常错误]
所以基本上问题是HDFS文件夹的权限。
像：
sudo -u hdfs hdfs dfs -chmod -R 777 /
将修复错误。
但我的问题是......不安全吗？为什么Cloudera不处理此权限？