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https://issues.apache.org/jira/browse/HADOOP-12734?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved HADOOP-12734.
-------------------------------------
Resolution: Invalid
> NameNode with naming contained underline "_" can not be started
> ----------------------------------------------------------------
>
> Key: HADOOP-12734
> URL: https://issues.apache.org/jira/browse/HADOOP-12734
> Project: Hadoop Common
> Issue Type: Bug
> Components: conf
> Affects Versions: 2.7.1
> Reporter: Wei Guo
> Priority: Minor
>
> I wrote core-site.xml with nameNode contains "_" char , the nameNode will
> not be able to start up, which with error msg like:
> "Incorrect configuration: namenode address dfs.namenode.rpc-address is not
> configured"
> -->"hdp_m1:9000"
> --------------------
> <property>
> <name>fs.default.name</name>
> <value>hdfs://hdp_m1:9000</value>
> </property>
> --------------------
> NameNode starts up after removing "_".
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