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https://issues.apache.org/jira/browse/FLINK-2037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14548064#comment-14548064
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Robert Metzger commented on FLINK-2037:
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I'm not sure how to resolve this issue.
The problem is that the python code assumed that there is a flink-python.jar in
the {{lib/}} folder.
Since we're packaging everything in one fat-jar, this assumption is not true.
However the code required by the Python API is contained in the fat jar (called
{{flink-dist.jar}}.
The easiest workaround for the issue is to submit the fat jar itself to the job
client. But I don't think this is a feasible solution because the system should
have loaded all the classes already ;)
I see the following approaches to resolve the issue:
* Create a flink-python.jar in {{lib/}} which contains the python stuff.
* Allow the CliFrontend to run without a valid jar file (i suspect this breaks
a lot of code and reduces usability because we can not hint a user that the jar
file is missing anymore).
* We do not submit Python jobs to a cluster using the client.
For now, I'll see whether the first option is easily doable.
> Unable to start Python API using ./bin/pyflink*.sh
> --------------------------------------------------
>
> Key: FLINK-2037
> URL: https://issues.apache.org/jira/browse/FLINK-2037
> Project: Flink
> Issue Type: Bug
> Components: Python API
> Affects Versions: 0.9
> Reporter: Robert Metzger
> Assignee: Robert Metzger
> Priority: Critical
>
> Calling {{./bin/pyflink3.sh}} will lead to
> {code}
> ./bin/pyflink3.sh
> log4j:WARN No appenders could be found for logger
> (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).
> log4j:WARN Please initialize the log4j system properly.
> log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more
> info.
> JAR file does not exist:
> /home/robert/incubator-flink/build-target/bin/../lib/flink-python-0.9-SNAPSHOT.jar
> Use the help option (-h or --help) to get help on the command.
> {code}
> This is due to the script expecting a {{flink-python-0.9-SNAPSHOT.jar}} file
> to exist in {{lib}} (its wrong anyways that the version name is included
> here. That should be replaced by a {{*}}).
> I'll look into the issue ...
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