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From "Vrushali C (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-3650) Consider concurrency situations for TimelineWriter
Date Fri, 15 May 2015 04:33:00 GMT
Vrushali C created YARN-3650:
--------------------------------

             Summary: Consider concurrency situations for TimelineWriter
                 Key: YARN-3650
                 URL: https://issues.apache.org/jira/browse/YARN-3650
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Vrushali C



[~jrottinghuis] brought up an interesting point in YARN-3411. Filing jira to track to discuss
and handle the following: 

For TimelineWriter and its implementations, is there an expectation set around
concurrency? Is any synchronization expected / needed to ensure visibility when calls happen
from different threads?
How about entities, are they expected to be immutable once passed to the write method?
Similarly for the constructor, we're assuming that the configuration object will not be modified
while we're constructing a TimelineWriter?




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