[IMPALA-1050] NPE error when pool placement policy cannot map user to pool

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: Impala 1.3.1
• Fix Version/s: Impala 1.4
• Assignee: Matthew Jacobs
• Reporter: Matthew Jacobs
• Created: 13/Jun/14 16:15
• Updated: 20/Dec/15 00:05
• Resolved: 16/Jun/14 19:12

Description

The admission controller will reject a query if the pool placement policy (specified by the fair-scheduler.xml) cannot resolve a pool. Currently, an NPE error is returned but we should return a helpful error message.

Currently:

[localhost:21000] > select 1;
Query: select 1
ERROR: NullPointerException: null

Expected:

[localhost:21000] > select 1;
Query: select 1
ERROR: No mapping found for request from user 'mj' with requested pool ''