[jira] [Created] (HDFS-9157) [OEV and OIV] : Unnecessary parsing for mandatory arguements if "-h" option is specified as the only option

["nijel (JIRA)" <ji...@apache.org>]

nijel created HDFS-9157:
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             Summary: [OEV and OIV] : Unnecessary parsing for mandatory arguements if "-h" option is specified as the only option
                 Key: HDFS-9157
                 URL: https://issues.apache.org/jira/browse/HDFS-9157
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: nijel
            Assignee: nijel


In both tools, if "-h" is specified as the only option, it throws error as input and output not specified.
{noformat}
master:/home/nijel/hadoop-3.0.0-SNAPSHOT/bin # ./hdfs oev -h
Error parsing command-line options: Missing required options: o, i
Usage: bin/hdfs oev [OPTIONS] -i INPUT_FILE -o OUTPUT_FILE
{noformat}

In code the parsing is happening before the "-h" option is verified
Can add code to return after initial check.

{code}
    if (argv.length == 1 && argv[1] == "-h") {
      printHelp();
      return 0;
    }
{code}



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