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https://issues.apache.org/jira/browse/HADOOP-5075?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matei Zaharia updated HADOOP-5075:
----------------------------------
Resolution: Fixed
Hadoop Flags: [Reviewed]
Status: Resolved (was: Patch Available)
I've committed this fix into 0.20 and trunk. It didn't affect 0.19, I had
mislabeled the JIRA originally.
> Potential infinite loop in updateMinSlots
> -----------------------------------------
>
> Key: HADOOP-5075
> URL: https://issues.apache.org/jira/browse/HADOOP-5075
> Project: Hadoop Core
> Issue Type: Bug
> Components: contrib/fair-share
> Reporter: Matei Zaharia
> Priority: Blocker
> Fix For: 0.20.0, 0.21.0
>
> Attachments: hadoop-5075-v2.patch, hadoop-5075-v3.patch,
> hadoop-5075-v4.patch, hadoop-5075.patch
>
>
> We ran into a problem at Facebook where the updateMinSlots loop in the
> scheduler was repeating infinitely. This might happen if, due to rounding, we
> are unable to assign the last few slots in a pool. This patch adds a break
> statement to ensure that the loop exists if it hasn't managed to assign any
> slots.
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