[ZEPPELIN-1492] Web Socket not updating notebook content correctly

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.7.2, 0.8.0

Environment

Google Chrome 53.0.2785.116 m
Zeppelin Version 0.6.1

• Assignee: Frank Rosner
• Reporter: Aleksandar Buha
• Created: 26/Sep/16 12:11
• Updated: 04/Apr/17 20:04
• Resolved: 04/Apr/17 20:04

Description

While accessing and editing the same notebook via two web-browser windows, synchronization is failing if I do two consecutive updates from one of the browser windows.

This issue can be reproduced with the following two browser-windows and a single notebook.

Browser A:

%pyspark
print "Original Zeppelin Notebook"

In Browser B, edit the notebook and the above command to:

%pyspark
print "Notebook is updated...."

If I run the notebook via browser A followed by Browser B, everything is updated nicely. However, if I add the following line to the Notebook though Browser B:

print "....once again"

and run the notebook through Browser B again, the content in Browser A is not updated.

Inside WebSocket object (Browser A) I can see that "op":"NOTE" has attribute "text":"%pyspark\nprint \"Notebook is updated....\"\nprint \"....once again\"". Unfortunately, I do not see the second print statement displayed on screen.

Issue Links

• links to: GitHub Pull Request #2120