[FLINK-19852] Managed memory released check can block IterativeTask

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.11.0, 1.10.2, 1.12.0, 1.11.1, 1.11.2
• Fix Version/s: 1.12.0, 1.11.3
• Component/s: Runtime / Task
• Labels: pull-request-available
• Assignee: Roman Khachatryan
• Reporter: shaomeng.wang
• Created: 28/Oct/20 10:11
• Updated: 27/Nov/20 15:04
• Resolved: 27/Nov/20 15:04

Description

UnsafeMemoryBudget#reserveMemory, called on TempBarrier, needs time to wait on GC of all allocated/released managed memory at every iteration.

 

stack:

new TempBarrier in BatchTask

 

These will be very slow than before.

Issue Links

• is caused by: FLINK-15758 Investigate potential out-of-memory problems due to managed unsafe memory allocation
• links to: GitHub Pull Request #14184
• links to: GitHub Pull Request #14221