[CASSANDRA-13764] SelectTest.testMixedTTLOnColumnsWide is flaky

• Type: Bug
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 3.0.15, 3.11.1, 4.0-alpha1, 4.0
• Component/s: Legacy/Testing
• Severity: Low
• Assignee: Jeff Jirsa
• Reporter: Joel Knighton

Authors

Jeff Jirsa

Reviewers

Joel Knighton

• Created: 15/Aug/17 02:21
• Updated: 15/May/20 07:59
• Resolved: 29/Aug/17 22:53

Description

org.apache.cassandra.cql3.validation.operations.SelectTest.testMixedTTLOnColumnsWide is flaky. This is because it inserts rows and then asserts their contents using ttl() in the select, but if the test is sufficiently slow, the remaining ttl may change by the time the select is run. Anecdotally, testSelectWithAlias in the same class uses a fudge factor of 1 second that would fix all the failures I've seen, but it might make more sense to measure the elapsed time in the test and calculate the acceptable variation from that time.

Issue Links

• relates to: CASSANDRA-13711 Invalid writetime for null columns in cqlsh