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https://issues.apache.org/jira/browse/FLINK-3560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15193078#comment-15193078
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ASF GitHub Bot commented on FLINK-3560:
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Github user tillrohrmann commented on the pull request:
https://github.com/apache/flink/pull/1752#issuecomment-196248133
`ProgramDescription` has not been marked as deprecated so far. Furthermore
it can be used to show information about the program using `bin/flink info` and
is not mandatory.
Admittedly, this feature isn't used by many programs but I think it does
not hurt to keep and implement this interface, unless we plan to remove it
soon. There was a
[discussion](http://mail-archives.apache.org/mod_mbox/flink-dev/201505.mbox/%3ccagco--b_vig6nx-7c1_oenekiurgdqjtrvrfu8+zxw96nfw...@mail.gmail.com%3E)
which also involved `ProgramDescription`. However, it does not look to me as
if it converged to some real action points.
> Examples shouldn't always print usage statement
> -----------------------------------------------
>
> Key: FLINK-3560
> URL: https://issues.apache.org/jira/browse/FLINK-3560
> Project: Flink
> Issue Type: Improvement
> Components: Examples
> Affects Versions: 1.0.0
> Reporter: Till Rohrmann
> Assignee: Till Rohrmann
> Priority: Minor
>
> At the moment all our examples print a usage statement no matter whether the
> parameters have been provided or not. This can be confusing for people
> because an usage statement is usually only printed if one has specified a
> wrong parameter or if a parameter is missing.
> I propose to remove the unchecked printing of the usage statement.
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