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https://issues.apache.org/jira/browse/HADOOP-10545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13984535#comment-13984535
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Masatake Iwasaki commented on HADOOP-10545:
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[~sbarrier] Can you show the configs which can reproduce this? I think
dfs.nameservices and dfs.ha.namenodes.* and dfs.namenode.rpc-address.* are
relevant.
> hdfs zkfc NullPointerException
> ------------------------------
>
> Key: HADOOP-10545
> URL: https://issues.apache.org/jira/browse/HADOOP-10545
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.4.0
> Environment: Linux
> Reporter: Sebastien Barrier
> Priority: Minor
>
> Running hdfs zkfc on a node which is not a Namenode result of
> NullPointerException.
> An error message should be displayed telling that zkfc must be run only on a
> Namenode server and/or to verify configuration parameters.
> # hdfs zkfc -formatZK
> Exception in thread "main" java.lang.NullPointerException
> at
> com.google.common.base.Preconditions.checkNotNull(Preconditions.java:187)
> at
> org.apache.hadoop.hdfs.tools.NNHAServiceTarget.<init>(NNHAServiceTarget.java:57)
> at
> org.apache.hadoop.hdfs.tools.DFSZKFailoverController.create(DFSZKFailoverController.java:128)
> at
> org.apache.hadoop.hdfs.tools.DFSZKFailoverController.main(DFSZKFailoverController.java:172)
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