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https://issues.apache.org/jira/browse/SOLR-3997?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13485234#comment-13485234
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Otis Gospodnetic commented on SOLR-3997:
----------------------------------------

James - try asking on the mailing list, not in JIRA.
                
> 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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