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https://issues.apache.org/jira/browse/TOREE-508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16995558#comment-16995558
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ASF GitHub Bot commented on TOREE-508:
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gmcoringa commented on pull request #180: [TOREE-508] Reply errors to 
iopub.error instead of iopub.exec_result
URL: https://github.com/apache/incubator-toree/pull/180
 
 
   Fix string values within Metadata, the values needs to be json string.
   Reply errors to iopub.error instead of iopub.exec_result
   
 
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> Reply errors to iopub.error instead of iopub.exec_result
> --------------------------------------------------------
>
>                 Key: TOREE-508
>                 URL: https://issues.apache.org/jira/browse/TOREE-508
>             Project: TOREE
>          Issue Type: Bug
>            Reporter: Fabiano V. Santos
>            Priority: Major
>
> Errors of any kind (compilation, exceptions, etc) returns as normal results 
> instead of using iopub.error, so jupyter interpret the cell execution as 
> success which lead to problems if you use tools like papermill to schedule 
> notebooks, as you never know if the notebook execution was successfully or 
> not.



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