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https://issues.apache.org/jira/browse/HADOOP-8231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13502996#comment-13502996
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liang xie commented on HADOOP-8231:
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"hdfs dfsadmin -printTopology" is a good way to dump topology state
> Make topologies easier to set up and debug
> ------------------------------------------
>
> Key: HADOOP-8231
> URL: https://issues.apache.org/jira/browse/HADOOP-8231
> Project: Hadoop Common
> Issue Type: Improvement
> Components: util
> Affects Versions: 0.23.1
> Reporter: Steve Loughran
> Priority: Minor
> Fix For: 3.0.0
>
>
> Topology scripts are a source of problems as they
> # are site-specific.
> # hard to get right.
> # can have adverse consequences on cluster operation when they go wrong.
> This issue is to group up the features needed to make it easier for ops
> people to get their scripts up and running.
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