Github user rmetzger commented on the pull request: https://github.com/apache/flink/pull/1097#issuecomment-157645907 Thank you for reviewing the pull request while I was away @fhueske. I've just tried it out with this code: ```java RequiredParameters rp = new RequiredParameters(); rp.add("input"); rp.add("output"); rp.add(new Option("parallelism").alt("p").help("Set the parallelism for all operators").type(OptionType.INTEGER)); ParameterTool pt = ParameterTool.fromArgs(args); try { rp.applyTo(pt); } catch(RequiredParametersException rpe) { System.out.println(rp.getHelp()); System.exit(1); } ``` and the output is the following: ``` Required Parameter name, short name, help text, default valueinput null output null parallelism p Set the parallelism for all operators ``` I think the `getHelp` method is not producing helpful output here. How about something like: ``` Required Parameters: --input --output -p, --parallelism Set the parallelism for all operators ``` The `RequiredParametersException` could list the missing arguments.
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