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https://issues.apache.org/jira/browse/HDFS-9790?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaobing Zhou updated HDFS-9790:
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Fix Version/s: 2.8.0
> HDFS Balancer should exit with a proper message if upgrade is not finalized
> ---------------------------------------------------------------------------
>
> Key: HDFS-9790
> URL: https://issues.apache.org/jira/browse/HDFS-9790
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Xiaobing Zhou
> Assignee: Xiaobing Zhou
>
> PROBLEM: Currently if the upgrade is not finalized the balancer just exits as
> it cannot move any blocks as no deletes can go through the datanodes before a
> finalize. This is not clear to customers as many in the field do not even
> understand what an upgrade finalized action does in HDFS.
> EXPECTED BEHAVIOR:
> Balancer should exit saying something like "Balancer exiting as upgrade is
> not finalized. Please finalize the hdfs upgrade before running the balancer"
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