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https://issues.apache.org/jira/browse/HADOOP-5203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12672536#action_12672536
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Owen O'Malley commented on HADOOP-5203:
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It you build the releases like the HowToRelease page describes, you'll get both
32 and 64 bit binaries with a single date stamp.
Hadoop doesn't support rolling upgrades and patching 1/2 of the TaskTrackers
sounds like a recipe for disaster.
> TT's version build is too restrictive
> -------------------------------------
>
> Key: HADOOP-5203
> URL: https://issues.apache.org/jira/browse/HADOOP-5203
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.19.0
> Reporter: Runping Qi
>
> At start time, TT checks whether its version is compatible with JT.
> The condition is too restrictive.
> It will shut down itself if one of the following conditions fail:
> * the version numbers must match
> * the revision numbers must match
> * the user ids who build the jar must match
> * the build times must match
> I think it should check the major part of the version numbers only (thus any
> version like 0.19.xxxx should be compatible).
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