[jira] [Created] (FLINK-17827) scala-shell.sh should fail early if no mode is specified, or have default logging settings

[Shang Yuanchun (Jira)]

Chesnay Schepler created FLINK-17827:
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             Summary: scala-shell.sh should fail early if no mode is specified, or have default logging settings
                 Key: FLINK-17827
                 URL: https://issues.apache.org/jira/browse/FLINK-17827
             Project: Flink
          Issue Type: Improvement
          Components: Scala Shell
    Affects Versions: 1.11.0
            Reporter: Chesnay Schepler


The scala-shell has multiple modes it can run in: local, remote and yarn.
It is mandatory to specify such a mode, but this is only enforced on the scala side, not in the bash script.

The problem is that the scala-shell script derives the log4j properties from the mode, and if no mode is set, then the log4j properties are empty.
This leads to a warning from slf4j that no logger was defined and all that.

Either scala-shell.sh should fail early if no mode is specified, or it should have some default logging settings (e.g., the ones for local/remote).



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