[IMPALA-12194] DataCacheTest.SetReadOnly intermittently fails on debug builds

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: Impala 4.3.0
• Fix Version/s: Impala 4.3.0
• Component/s: Backend
• Labels: broken-build flaky
• Epic Color: ghx-label-6
• Assignee: Joe McDonnell
• Reporter: Joe McDonnell
• Created: 08/Jun/23 17:26
• Updated: 10/Nov/23 06:13
• Resolved: 15/Sep/23 18:14

Description

Some precommit jobs have been hitting intermittent test failures on DataCacheTest.SetReadOnly:

/home/ubuntu/Impala/be/src/runtime/io/data-cache-test.cc:165
Expected: (cache_misses) > (0), actual: 0 vs 0

The test has a race condition that means it can't guarantee that the cache_misses is strictly greater than zero.