[KUDU-2420] Support parallel java tests

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7.0
• Fix Version/s: 1.8.0
• Assignee: Grant Henke
• Reporter: Grant Henke
• Created: 27/Apr/18 19:47
• Updated: 12/Jul/18 14:46
• Resolved: 12/Jul/18 14:46

Description

Java tests (integration or otherwise) that use the MiniCluster should do @Before/@After for cluster start/cleanup, so that they don't need to individually clean up after themselves. They shouldn't use @BeforeClass/@AfterClass when possible to support parallel unit tests. Each test should be run in it's own JVM to ensure isolation as well.

Tests that use 3 masters currently run serially as their master ports are all hard coded. Using ephemeral ports should eliminate this requirement.