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https://issues.apache.org/jira/browse/HBASE-20548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16476568#comment-16476568
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Andrew Purtell commented on HBASE-20548:
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> My proposal is to refresh HDFS block distribution at the end of master
> initialization and not at retainAssignment()'s createCluster().
I think this makes sense. Reasonable to say that O(region) or O(file) tasks
shouldn't block initialization, even if done in parallel. Schedule it or start
it in the background.
> Master fails to startup on large clusters, refreshing block distribution
> ------------------------------------------------------------------------
>
> Key: HBASE-20548
> URL: https://issues.apache.org/jira/browse/HBASE-20548
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 1.4.4
> Reporter: Thiruvel Thirumoolan
> Assignee: Thiruvel Thirumoolan
> Priority: Major
> Fix For: 1.5.0, 1.4.5
>
>
> On our large clusters with, master has failed to startup within specified
> time and aborted itself since it was initializing HDFS block distribution.
> Enable table also takes time for larger tables for the same reason. My
> proposal is to refresh HDFS block distribution at the end of master
> initialization and not at retainAssignment()'s createCluster(). This would
> address HBASE-16570's intention, but avoid the problems we ran into.
> cc [~aoxiang] [~tedyu]
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