Clicking Run on Cell Before Kernel is Ready for Spark Results in Fatal Error #4427
Description
For Spark kernels (the Analyze in Notebook is an easy example to test here), clicking the run button on a cell before the kernel shows as available in the kernels dropdown results in the following message in the cell, and users are stuck in this broken state unless they switch kernels:
The code failed because of a fatal error:
Error sending http request and maximum retry encountered..
Some things to try:
a) Make sure Spark has enough available resources for Jupyter to create a Spark context.
b) Contact your Jupyter administrator to make sure the Spark magics library is configured correctly.
c) Restart the kernel.