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https://issues.apache.org/jira/browse/HDFS-3439?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo Nicholas Sze resolved HDFS-3439.
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Resolution: Cannot Reproduce
Target Version/s: (was: )
Resolving as Cannot Reproduce.
{code}
$hadoop balancer -Dfs.defaultFS=hdfs://foo.example.com:8020/
-Ddfs.namenode.servicerpc-address=hdfs://foo.example.com:8020
DEPRECATED: Use of this script to execute hdfs command is deprecated.
Instead use the hdfs command for it.
15/12/03 13:47:12 INFO balancer.Balancer: namenodes =
[hdfs://foo.example.com:8020]
{code}
> Balancer exits if fs.defaultFS is set to a different, but semantically
> identical, URI from dfs.namenode.rpc-address
> -------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-3439
> URL: https://issues.apache.org/jira/browse/HDFS-3439
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: balancer & mover
> Affects Versions: 2.0.0-alpha
> Reporter: Aaron T. Myers
>
> The balancer determines the set of NN URIs to balance by looking at
> fs.defaultFS and all possible dfs.namenode.(service)rpc-address settings. If
> fs.defaultFS is, for example, set to "hdfs://foo.example.com:8020/" (note the
> trailing "/") and the rpc-address is set to "hdfs://foo.example.com:8020"
> (without a "/"), then the balancer will conclude that there are two NNs and
> try to balance both. However, since both of these URIs refer to the same
> actual FS instance, the balancer will exit with "java.io.IOException: Another
> balancer is running. Exiting ..."
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