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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-10544) Balancer doesn't work with IPFailoverProxyProvider
Date Fri, 17 Jun 2016 18:12:05 GMT
Zhe Zhang created HDFS-10544:

             Summary: Balancer doesn't work with IPFailoverProxyProvider
                 Key: HDFS-10544
                 URL: https://issues.apache.org/jira/browse/HDFS-10544
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Zhe Zhang
            Assignee: Zhe Zhang

Right now {{Balancer}} gets the NN URIs through {{DFSUtil#getNameServiceUris}}, which returns
logical URIs in HA is enabled. If {{IPFailoverProxyProvider}} is used, {{Balancer}} will not
be able to start.

I think the bug is at {{DFSUtil#getNameServiceUris}}:
    for (String nsId : getNameServiceIds(conf)) {
      if (HAUtil.isHAEnabled(conf, nsId)) {
        // Add the logical URI of the nameservice.
        try {
          ret.add(new URI(HdfsConstants.HDFS_URI_SCHEME + "://" + nsId));

Then {{if}} clause should also consider if the {{FailoverProxyProvider}} has {{useLogicalURI}}
enabled. If not, {{getNameServiceUris}} should try to resolve the physical URI for this nsId.

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