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Posted to common-issues@hadoop.apache.org by GitBox <gi...@apache.org> on 2022/06/13 11:09:59 UTC

[GitHub] [hadoop] LennonChin commented on pull request #4435: YARN-11178. Avoid CPU busy idling and resource wasting in DelegationTokenRenewerPoolTracker thread

LennonChin commented on PR #4435:
URL: https://github.com/apache/hadoop/pull/4435#issuecomment-1153783910

   > @LennonChin I ask a question, Why do you need to add the synchronized keyword?
   
   @slfan1989  Hi, synchronized code block is needed for waiting operation, `Object.wait()` need a monitor object, otherwise it will throw java.lang.IllegalMonitorStateException.


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