Adam Wang created HBASE-25370:
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Summary: Fix flaky test
TestClassFinder#testClassFinderDefaultsToOwnPackage
Key: HBASE-25370
URL: https://issues.apache.org/jira/browse/HBASE-25370
Project: HBase
Issue Type: Test
Reporter: Adam Wang
The test {{TestClassFinder#testClassFinderDefaultsToOwnPackage}} compares two
sets from {{allClassesFinder.findClasses}}. However, the function
{{allClassesFinder.findClasses}} does not return the deterministic order
result. From code trace, the root cause is at
{{ClassFinder.findClassesFromJar}} and {{ClassFinder.findClassesFromFiles}}.
They use {{HashSet}} to store {{classes}} and {{listFiles}} to get file array.
However, {{HashSet}} and {{listFiles}} do not guarantee that order, and the
assertion can fail if the order differs.
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