James Ji created SOLR-3997:
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             Summary: Have solr config and index files on HDFS.
                 Key: SOLR-3997
                 URL: https://issues.apache.org/jira/browse/SOLR-3997
             Project: Solr
          Issue Type: Wish
          Components: SearchComponents - other
    Affects Versions: 4.0
            Reporter: James Ji


We are currently working on having Solr files read from HDFS. We extended some 
of the classes so as to avoid modifying the original Solr code and make it 
compatible with the future release. So here comes the question, I found in 
QueryElevationComponent, there is a piece of code checking whether elevate.xml 
exists at local file system. I am wondering if there is a way to by pass this?
QueryElevationComponent.inform(){
    ....
    File fC = new File(core.getResourceLoader().getConfigDir(), f);
    File fD = new File(core.getDataDir(), f);
    if (fC.exists() == fD.exists()) {
         throw new SolrException(SolrException.ErrorCode.SERVER_ERROR,
             "QueryElevationComponent missing config file: '" + f + "\n"
             + "either: " + fC.getAbsolutePath() + " or " +                     
 fD.getAbsolutePath() + " must exist, but not both.");
          }
     if (fC.exists()) {
            exists = true;
            log.info("Loading QueryElevation from: "+fC.getAbsolutePath());
            Config cfg = new Config(core.getResourceLoader(), f);
            elevationCache.put(null, loadElevationMap(cfg));
     }
    ....
}

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