jason ogaard created ZEPPELIN-5691:
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             Summary: Code completion for ipython causes exception (sometimes)
                 Key: ZEPPELIN-5691
                 URL: https://issues.apache.org/jira/browse/ZEPPELIN-5691
             Project: Zeppelin
          Issue Type: Bug
          Components: zeppelin-interpreter
    Affects Versions: 0.10.1
            Reporter: jason ogaard
         Attachments: image-2022-03-24-11-37-04-519.png

The first time a user tries to use code completion for the iPython interpreter 
the notebook will hang for a long time (I believe it's waiting for the 
websocket to return) and will get the pop up below (tested on the latest docker 
image for apache zeppelin found on docker hub)

 

!image-2022-03-24-11-37-04-519.png|width=680,height=181!

After this code completion usually works but will sometimes throw this error 
again. This error will happen again if the user restarts the interpreter.

 

We do not get this error when attempting code completion for the python 
interpreter. I've traced through the code as well as I can and believe the 
issue is that code completion is trying to use the PythonInterpreter class to 
get the completion list, but since we're using the iPython interpreter the 
PythonInterpreter class is not instantiated, and therefore get the NPE. I could 
be wrong though.

 

 



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