[CAMEL-17064] Investigate causes of flakes in camel unit tests

• Type: Task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.12.0
• Fix Version/s: 3.15.0
• Component/s: tests
• Estimated Complexity: Unknown
• Assignee: Karen Lease
• Reporter: Karen Lease
• Created: 11/Oct/21 09:42
• Updated: 03/Jan/22 20:56
• Resolved: 03/Jan/22 20:56

Description

When running tests on camel-core there are quite a lot of "flakes", where tests fail once or twice and then succeed. When using latest JUnit5, there are more flakes then previously and occasionally also failures. This is due to running tests in parallel.
Investigate the tests which are most often failing to detect common causes and propose improvements.

Issue Links

• Discovered while testing: CAMEL-17000 Upgrade to junit 5.8.x
• links to: GitHub Pull Request #6585

Sub-Tasks

• XXXParallelWithAggregationStrategyThrowingExceptionTest often fail: Resolved
• MulticastParallel tests for timeouts are often flaky: Resolved
• The file consumer finds files before they have content: Resolved
• DurationRoutePolicy tests often fail on first run: Resolved
• SedaDiscardWhenFullTest frequently fails: Resolved
• AggregateTimeoutWithExecutorServiceTest sometimes fails: Resolved