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https://issues.apache.org/jira/browse/FLINK-20687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17252516#comment-17252516
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Kostas Kloudas commented on FLINK-20687:
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Hi [~jiang7chengzitc], you are right about the behaviour you describe. Although
this is the expected behaviour. The intention is that we display only the
{{target}} options that you can actually use. In addition, in terms of code, to
include even the non-available ones, like the {{yarn-application}} when hadoop
is not in the classpath, we would have to hardcode them in the error message,
something that is not so future-proof. That is because if in the future we
choose to add another framework, then we should again remember to hardcode the
new executor in the help message.
> Missing 'yarn-application' target in CLI help message
> -----------------------------------------------------
>
> Key: FLINK-20687
> URL: https://issues.apache.org/jira/browse/FLINK-20687
> Project: Flink
> Issue Type: Improvement
> Components: Command Line Client
> Affects Versions: 1.12.0
> Reporter: Ruguo Yu
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.13.0, 1.12.1
>
> Attachments: image-2020-12-20-21-48-18-391.png,
> image-2020-12-20-22-02-01-312.png
>
>
> Missing 'yarn-application' target in CLI help message when i enter command
> 'flink run-application -h', as follows:
> !image-2020-12-20-21-48-18-391.png|width=516,height=372!
> The target name is obtained through SPI, and I checked the SPI
> META-INF/servicesis is correct.
>
> Next i put flink-shaded-hadoop-*-.jar to flink lib derectory or set
> HADOOP_CLASSPATH, it can show 'yarn-application', as follows:
> !image-2020-12-20-22-02-01-312.png|width=808,height=507!
> However, I think it is reasonable to show 'yarn-application' without any
> action.
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