[IMPALA-4557] test_alloc_fail.py is flaky

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: Impala 2.8.0
• Fix Version/s: Impala 2.8.0
• Component/s: Backend
• Labels: broken-build
• Target Version: Impala 2.8.0
• Assignee: Michael Ho
• Reporter: Michael Ho
• Created: 29/Nov/16 23:17
• Updated: 01/Dec/16 18:57
• Resolved: 01/Dec/16 18:57

Description

An expected exception wasn't thrown in test_alloc_fail.py. It has happened twice recently.
The crash in the test infrastructure code is due to the fact that it's expecting test_section['CATCH'] to be strings but it's in fact a list of strings. The flakiness in the test may be due to how the stress counter in free-pool.h is updated racily.

select ndv(l_partkey), distinctpc(l_suppkey) from tpch.lineitem;

12:52:45         if 'CATCH' in test_section:
12:52:45 >         assert test_section['CATCH'].strip() == ''
12:52:45 E         AttributeError: 'list' object has no attribute 'strip'