[YARN-8195] Fix constraint cardinality check in the presence of multiple target allocation tags

• Type: Sub-task
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 3.2.0, 3.1.1
• Target Version/s: 3.2.0, 3.1.1
• Assignee: Weiwei Yang
• Reporter: Weiwei Yang
• Created: 21/Apr/18 07:55
• Updated: 01/May/18 01:53
• Resolved: 30/Apr/18 19:03

Description

While testing PC with multiple allocation tags, I found the behavior is not working as expected. To demonstrate this issue, imagine we have following PC

X=1, notin,node, A, B

this is to ask for a placement on a node that has no A or B.

now assume we have A, B tags on a node with following numbers of allocations,

A(0), B(1)

expectation, as B has 1 allocation on this node, this node should not satisfy the PC. However in actual, it passes the check.