[KUDU-1236] Maintenance manager schedules empty flushes when server is above memory limit

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: Public beta
• Fix Version/s: 0.6.0
• Component/s: tserver
• Target Version/s: 0.6.0
• Code Review: http://gerrit.cloudera.org:8080/1358
• Assignee: Jean-Daniel Cryans
• Reporter: Todd Lipcon
• Created: 29/Oct/15 03:05
• Updated: 29/Feb/16 09:52
• Resolved: 03/Nov/15 22:19

Description

If a server is configured with a small memory limit, it's possible for its non-flushable memory to end up being more than the hard limit. In this case, the maintenance manager will decide that it should prioritize flushing, and does so even when there is no data that can actually be flushed. This causes it to go into a tight loop flushing empty MRSes.

Issue Links

• relates to: KUDU-1237 When compaction generates no output, blocks are leaked