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From "Eli Collins (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-2983) Relax the build version check to permit rolling upgrades within a release
Date Wed, 22 Feb 2012 18:17:49 GMT
Relax the build version check to permit rolling upgrades within a release
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                 Key: HDFS-2983
                 URL: https://issues.apache.org/jira/browse/HDFS-2983
             Project: Hadoop HDFS
          Issue Type: Improvement
    Affects Versions: 0.23.0
            Reporter: Eli Collins


Currently the version check for DN/NN communication is strict (it checks the exact svn revision
or git hash, Storage#getBuildVersion calls VersionInfo#getRevision), which prevents rolling
upgrades across any releases. Once we have the PB-base RPC in place (coming soon to branch-23)
we'll have the necessary pieces in place to loosen this restriction, though perhaps it takes
another 23 minor release or so before we're ready to commit to making the minor versions compatible.

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