[CASSANDRA-19028] Python DTest does not release CQL connections, which can cause containers to hang for 2 hours trying to connect to a server thats already gone

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: NA
• Component/s: Test/dtest/python
• Bug Category: Degradation - Resource Management
• Severity: Normal
• Complexity: Low Hanging Fruit
• Discovered By: Unit Test
• Platform: All
• Since Version: NA

Source Control Link

https://github.com/apache/cassandra-dtest/commit/b355b84c5f7b53d390822332215e3751df562559

Test and Documentation Plan

test cross all branches

• Assignee: David Capwell
• Reporter: David Capwell

Authors

David Capwell

Reviewers

Brandon Williams

• Created: 15/Nov/23 14:45
• Updated: 15/Nov/23 18:11
• Resolved: 15/Nov/23 18:11

Description

While debugging why upgrade tests were taking 2 hours we noticed that the test completed 2 hours early… yet the process did not exit and was logging cassandra.pool trying to connect to a cluster (but python dtest already cleaned it up)…

After investigating the code I saw that we create connections and store them in an array, but only 2 tests actually clean up!

Issue Links

• is duplicated by: CASSANDRA-19027 Python DTest does not release CQL connections, which can cause containers to hang for 2 hours trying to connect to a server thats already gone
• links to: GH: python trunk