Mehrdad Nurolahzade created AURORA-1820:
-------------------------------------------
Summary: Reduce storage write lock contention by adopting
Double-Checked Locking pattern in TimedOutTaskHandler
Key: AURORA-1820
URL: https://issues.apache.org/jira/browse/AURORA-1820
Project: Aurora
Issue Type: Task
Components: Efficiency, Scheduler
Reporter: Mehrdad Nurolahzade
Assignee: Mehrdad Nurolahzade
Priority: Critical
{{TimedOutTaskHandler}} acquires storage write lock for every task every time
they transition to a transient state. It then verifies after a default time-out
period of 5 minutes if the task has transitioned out of the transient state.
The verification step takes place while holding the storage write lock. In over
99% of cases the logic short-circuits and returns from
{{StateManagerImpl.updateTaskAndExternalState()}} once it learns task has
transitioned out of the transient state.
Reduce storage write lock contention by adopting [Double-Checked
Locking|https://en.wikipedia.org/wiki/Double-checked_locking] pattern in
{{TimedOutTaskHandler.run()}}.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
