when trying to run Zeppelin for the first time i get this error ? Any help please !

[#1]

[#2]

@Emil yes, i run it on HDP Sandbox and the Spark Thrift Server was Stopped , but connection still refused for the same exception even after i start it !!

[#3]

Which version of the HDP Sandbox are you running? (2.4 or 2.3.x)

There is a chance that zeppelin can't connect to the Spark interpreter, so from the Interpreter page (shown), click on the [restart] button, wait for 5 seconds, and go back and refresh the notebook page. Also, from the notebook page in zeppelin, click on the gears icon to make sure Spark is one of the listed interpreters.

[#4]

i'm running HDP 2.4 , i restarted Spark and it appear in the list of my notebook's interpreter but the problem still exists !