[LUCENE-4252] Detect/Fail tests when they leak RAM in static fields

• Type: Test
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0, 6.0
• Component/s: general/test
• Lucene Fields: New
• Assignee: Dawid Weiss
• Reporter: Robert Muir
• Created: 25/Jul/12 04:31
• Updated: 28/Aug/22 13:22
• Resolved: 12/Sep/12 08:20

Description

We run our junit tests without firing up a JVM each time.

But some tests initialize lots of stuff in @BeforeClass and don't properly null it out in an @AfterClass, which can cause a subsequent test in the same JVM to OOM, which is difficult to debug.

Inspiration for this was me committing Mike's cool TestPostingsFormat, which forgot to do this: then we were seeing OOMs in several jenkins runs.

We should try to detect these leaks in LuceneTestCase with RAMUsageEstimator and fail the test.