Luke Ashworth created ZEPPELIN-3065:
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Summary: Personalized mode does not allow multiple users to run
the same paragraph at the same time
Key: ZEPPELIN-3065
URL: https://issues.apache.org/jira/browse/ZEPPELIN-3065
Project: Zeppelin
Issue Type: Bug
Components: Core
Reporter: Luke Ashworth
In personalized mode, if user A is running a paragraph and user B starts
running the paragraph before user A's run has completed then user A's paragraph
will remain stuck in the "running" state. Furthermore, all messages from user
B's run be appended to the output for user A.
The cause of the issue is:
- Both user A's and user B's runs will be executed by calling the jobRun
method on the same Paragraph instance. The personalised state of each user's
paragraph is supposed to be stored in the userParagraphMap Map.
- The user field on the paragraph instance is set to the last user to start
running the paragraph. This will initially be user A but change to user B when
they start running it.
- The user field on the paragraph instance is used to decide which user to set
paragraph status updates for (in the setStatusToUserParagraph method, which
sets the status on the relevant paragraph in the userParagraphMap). This means
that both status updates for the "FINISHED" state will go to user B.
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