Wilfred Spiegelenburg created YUNIKORN-2445:
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Summary: Add comments around locking setup in tracker code
Key: YUNIKORN-2445
URL: https://issues.apache.org/jira/browse/YUNIKORN-2445
Project: Apache YuniKorn
Issue Type: Task
Components: core - scheduler
Reporter: Wilfred Spiegelenburg
The QueueTracker code is lock free and should stay lock free. Each queue
tracker object is always only linked to one UserTracker or GroupTracker.
Locking is thus handled from those objects.
This does mean that calls to the user or group trackers that can modify the
underlying queue tracker structure must take a write lock.
This specifically impacts the {{canRunApp()}} and {{headroom()}} calls as they
add new entries in the queue hierarchy.
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