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https://issues.apache.org/jira/browse/FLINK-15786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17044263#comment-17044263
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Piotr Nowojski commented on FLINK-15786:
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I second [~fly_in_gis]'s question. When we were designing/thinking about
plugins, we had connectors in mind as well. There were couple of reasons why we
didn't do that in the first version though.
> Load connector code with separate classloader
> ---------------------------------------------
>
> Key: FLINK-15786
> URL: https://issues.apache.org/jira/browse/FLINK-15786
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Task
> Reporter: Guowei Ma
> Priority: Major
> Labels: usability
>
> Currently, connector code can be seen as part of user code. Usually, users
> only need to add the corresponding connector as a dependency and package it
> in the user jar. This is convenient enough.
> However, connectors usually need to interact with external systems and often
> introduce heavy dependencies, there is a high possibility of a class conflict
> of different connectors or the user code of the same job. For example, every
> one or two weeks, we will receive issue reports relevant with connector class
> conflict from our users. The problem can get worse when users want to analyze
> data from different sources and write output to different sinks.
> Using separate classloader to load the different connector code could resolve
> the problem.
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