[jira] [Created] (FLINK-29144) Enable multiple jar entries for jarURI

[Arseniy Tashoyan (Jira)]

Arseniy Tashoyan created FLINK-29144:
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             Summary: Enable multiple jar entries for jarURI
                 Key: FLINK-29144
                 URL: https://issues.apache.org/jira/browse/FLINK-29144
             Project: Flink
          Issue Type: Improvement
          Components: Kubernetes Operator
    Affects Versions: 1.15.1
            Reporter: Arseniy Tashoyan


The setting _job.jarURI_ accepts a string with the path to the jar-file:

{code:yaml}
 job:
  jarURI: local:///opt/flink/examples/streaming/StateMachineExample.jar
{code}

This could be improved to accept a list of jars:

{code:yaml}
 job:
    jarURIs:
    - local:///opt/flink/examples/streaming/StateMachineExample.jar
    - local:///opt/libext/scala-logging.jar
{code}

This could also be improved to accept a directory with jars:

{code:yaml}
 job:
    jarDir: ///opt/basic/lib
{code}

Internally, Flink Kubernetes Operator uses the property _pipeline.jars_ - see 
[FlinkConfigBuilder.java 
|https://github.com/apache/flink-kubernetes-operator/blob/main/flink-kubernetes-operator/src/main/java/org/apache/flink/kubernetes/operator/config/FlinkConfigBuilder.java#L259]:

{code:java}
effectiveConfig.set(PipelineOptions.JARS, 
Collections.singletonList(uri.toString()));
{code}

The property _pipeline.jars_ allows to pass more than one jar entry.

This improvement allows to avoid building a fat-jar. Instead we could provide a 
directory with normal jars.



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