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From "Li Lu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-11398) RetryUpToMaximumTimeWithFixedSleep needs to behave more accurately
Date Fri, 12 Dec 2014 23:15:15 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-11398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14244963#comment-14244963
] 

Li Lu commented on HADOOP-11398:
--------------------------------

The three findbugs warnings are not introduced by this Jira. There are on-going work to fix
them in separate Jiras. 

> RetryUpToMaximumTimeWithFixedSleep needs to behave more accurately
> ------------------------------------------------------------------
>
>                 Key: HADOOP-11398
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11398
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Li Lu
>            Assignee: Li Lu
>         Attachments: HADOOP-11398-121114.patch
>
>
> RetryUpToMaximumTimeWithFixedSleep now inherits RetryUpToMaximumCountWithFixedSleep and
just acts as a wrapper to decide maxRetries. The current implementation uses (maxTime / sleepTime)
as the number of maxRetries. This is fine if the actual for each retry is significantly less
than the sleep time, but it becomes less accurate if each retry takes comparable amount of
time as the sleep time. The problem gets worse when there are underlying retries. 
> We may want to use timers inside RetryUpToMaximumTimeWithFixedSleep to perform accurate
timing. 



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