Avery Ching commented on GIRAPH-136:

+1, much better.

First try.

$ ./bin/giraph target/giraph-0.1-SNAPSHOT-jar-with-dependencies.jar 
No lib directory, assuming dev environment
No HADOOP_CONF_DIR set, using /conf 
./bin/giraph: line 112: /bin/hadoop: No such file or directory
./bin/giraph: line 112: exec: /bin/hadoop: cannot execute: No such file or 

Second try after setting HADOOP_CONF_DIR.

$ ./bin/giraph target/giraph-0.1-SNAPSHOT-jar-with-dependencies.jar 
No lib directory, assuming dev environment
usage: org.apache.giraph.GiraphRunner [-aw <arg>] [-c <arg>] [-h] [-if
       <arg>] [-ip <arg>] [-of <arg>] [-op <arg>] [-q] [-w <arg>] [-wc
 -aw,--aggregatorWriter <arg>   AggregatorWriter class
 -c,--combiner <arg>            VertexCombiner class
 -h,--help                      Help
 -if,--inputFormat <arg>        Graph inputformat
 -ip,--inputPath <arg>          Graph input path
 -of,--outputFormat <arg>       Graph outputformat
 -op,--outputPath <arg>         Graph output path
 -q,--quiet                     Quiet output
 -w,--workers <arg>             Number of workers
 -wc,--workerContext <arg>      WorkerContext class

> Erorr message for bin/giraph could be improved
> ----------------------------------------------
>                 Key: GIRAPH-136
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-136
>             Project: Giraph
>          Issue Type: Improvement
>    Affects Versions: 0.1.0
>            Reporter: Jakob Homan
>            Assignee: Jakob Homan
>             Fix For: 0.2.0
>         Attachments: GIRAPH-136-b.patch, GIRAPH-136.patch
> Currently when one just runs bin/giraph without the required jar, the message 
> isn't very helpful:
> {noformat}[tardis giraph-0.1]$ bin/giraph
> Can't find user jar to execute.{noformat}
> It would be better to have a more in-depth message explaining Giraph and what 
> is expected.

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