[HADOOP-17485] port UGI#getGroupsSet optimizations into 2.10

• Type: Bug
• Status: In Progress
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.10.1
• Labels: pull-request-available
• Assignee: Ahmed Hussein
• Reporter: Ahmed Hussein
• Created: 21/Jan/21 17:33
• Updated: 26/Oct/21 21:33

Description

HADOOP-17079 introduced an optimization adding a UGI#getGroupsSet and use Set#contains() instead of List#contains() to speed up large group look up while minimize List->Set conversions in Groups#getGroups() call.

This ticket is to port the changes into branch-2.10.

 

CC: Jim_Brennan, xyao

Issue Links

• is related to: HADOOP-17079 Optimize UGI#getGroups by adding UGI#getGroupsSet
• requires: HADOOP-17467 netgroup-user is not added to Groups.cache
• links to: GitHub Pull Request #2631