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From "Akira AJISAKA (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-11398) RetryUpToMaximumTimeWithFixedSleep needs to behave more accurately
Date Tue, 14 Jul 2015 22:42:05 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-11398?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Akira AJISAKA updated HADOOP-11398:
-----------------------------------
    Attachment: HADOOP-11398.003.patch

Attaching a patch to fail after t2+delta_t.

> 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, HADOOP-11398.002.patch, HADOOP-11398.003.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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