[HDFS-11290] TestFSNameSystemMBean should wait until JMX cache is cleared

• Type: Test
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.8.0
• Fix Version/s: 2.9.0, 2.7.4, 3.0.0-alpha2, 2.6.6, 2.8.2
• Component/s: test
• Hadoop Flags: Reviewed
• Assignee: Erik Krogen
• Reporter: Akira Ajisaka
• Created: 04/Jan/17 07:56
• Updated: 07/Jun/17 23:23
• Resolved: 18/Jan/17 08:57

Description

TestFSNamesystemMBean#testWithFSNamesystemWriteLock and #testWithFSEditLogLock get metrics after locking FSNameSystem/FSEditLog, but when the metrics are cached, the tests success even if the metrics acquire the locks. The tests should wait until the cache is cleared.
This issue was reported by xkrogen in HDFS-11180.

Issue Links

• is related to: HDFS-11180 Intermittent deadlock in NameNode when failover happens.
• relates to: HDFS-11352 Potential deadlock in NN when failing over