[IMPALA-8612] NPE when DropTableOrViewStmt analysis leaves serverName_ NULL

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: Impala 2.12.0, Impala 3.2.0
• Fix Version/s: Impala 3.3.0
• Component/s: Frontend
• Epic Color: ghx-label-2
• Assignee: Gabor Kaszab
• Reporter: Gabor Kaszab
• Created: 03/Jun/19 11:03
• Updated: 27/Aug/19 13:22
• Resolved: 27/Aug/19 13:22

Description

This line is skipped when analyzer.getTable() throws few lines above:
https://github.com/apache/impala/blob/cd30949102425e28adadb51232653d910ac8422f/fe/src/main/java/org/apache/impala/analysis/DropTableOrViewStmt.java#L117

As a result a drop table statement (with permissions ON) can throw NullPointerException here:
https://github.com/apache/impala/blob/master/fe/src/main/java/org/apache/impala/authorization/sentry/SentryCatalogdAuthorizationManager.java#L381