[ZEPPELIN-3434] Error message shown to user should be consistent across interpreters

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 0.8.0
• Component/s: zeppelin-server
• Assignee: Unassigned
• Reporter: Supreeth Sharma
• Created: 27/Apr/18 17:49
• Updated: 28/Apr/18 00:05
• Resolved: 28/Apr/18 00:05

Description

Error message shown to the user should be consistent across interpreters.

For livy2 interpreter, if user tries to modify config(livy2.conf) then he is shown the error message :

Can not change interpreter session properties after this session is started

The error message shown in spark2 interpreter for the same scenario is :

Can not change interpreter properties when interpreter process has already been launched

Error messages should be consistent for both scenarios.

Test steps to reproduce this scenario :
1) Create livy2 config

%livy2.conf
livy.spark.app.name test_new_app
spark.executor.instances 2

2) Run any spark statement in new para

%livy2
sc.version

3) Once spark context is created, try to modify livy conf.

%livy2.conf
livy.spark.app.name test_new_app
spark.executor.instances 4

repeat the same steps for spark2 interpreter as well and see that error messages shown are same.