[GEODE-5292] Replace with concurrent clear and destroy leaks off heap memory

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.7.0
• Component/s: regions
• Labels: pull-request-available swat
• Assignee: Dan Smith
• Reporter: Dan Smith
• Created: 05/Jun/18 23:56
• Updated: 03/Oct/18 21:37
• Resolved: 16/Jul/18 19:07

Description

For a region that has been configured with off-heap storage and overflow to disk, memory can be leaked if

• region clear
• region destroy 
• region replace

all happen concurrently. The root cause appears to be region clear modifying entries for values stored on disk without synchronizing the entries. This prevents replace from freeing the off-heap memory for the new value when the replace fails because the region is being destroyed.

Issue Links

• links to: GitHub Pull Request #2031
• links to: GitHub Pull Request #2042
• links to: GitHub Pull Request #2140