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https://issues.apache.org/jira/browse/ACCUMULO-3132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14135773#comment-14135773
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Eric Newton commented on ACCUMULO-3132:
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I think the check only happens across major version (1.4.X -> 1.5.X, for
example). A serialization broke between 1.6.0 and 1.6.1-SNAPSHOT.
> Fate uses java serialization which is error-prone between upgrades
> ------------------------------------------------------------------
>
> Key: ACCUMULO-3132
> URL: https://issues.apache.org/jira/browse/ACCUMULO-3132
> Project: Accumulo
> Issue Type: Bug
> Components: master
> Affects Versions: 1.5.0, 1.5.1, 1.6.0
> Reporter: Eric Newton
>
> Fate uses java serialization to save objects to zookeeper. If an upgrade is
> performed while a Fate transaction is running, the data stored in Fate may
> not deserialize in the upgraded software unless developers are very careful
> about the Repo's internals.
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