[ https://issues.apache.org/jira/browse/HDFS-3723?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jing Zhao reassigned HDFS-3723: ------------------------------- Assignee: Jing Zhao > All commands should support meaningful --help > --------------------------------------------- > > Key: HDFS-3723 > URL: https://issues.apache.org/jira/browse/HDFS-3723 > Project: Hadoop HDFS > Issue Type: Improvement > Components: scripts, tools > Affects Versions: 2.0.0-alpha > Reporter: E. Sammer > Assignee: Jing Zhao > > Some (sub)commands support -help or -h options for detailed help while others > do not. Ideally, all commands should support meaningful help that works > regardless of current state or configuration. > For example, hdfs zkfc --help (or -h or -help) is not very useful. Option > checking should occur before state / configuration checking. > {code} > [esammer@hadoop-fed01 ~]# hdfs zkfc --help > Exception in thread "main" org.apache.hadoop.HadoopIllegalArgumentException: > HA is not enabled for this namenode. > at > org.apache.hadoop.hdfs.tools.DFSZKFailoverController.setConf(DFSZKFailoverController.java:122) > at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:66) > at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84) > at > org.apache.hadoop.hdfs.tools.DFSZKFailoverController.main(DFSZKFailoverController.java:168) > {code} > This would go a long way toward better usability for ops staff. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira