[jira] [Created] (SOLR-4413) SolrCore#getIndexDir() contract change between 3.6 and 4.1

["Gregg Donovan (JIRA)" <ji...@apache.org>]

Gregg Donovan created SOLR-4413:
-----------------------------------

             Summary: SolrCore#getIndexDir() contract change between 3.6 and 4.1
                 Key: SOLR-4413
                 URL: https://issues.apache.org/jira/browse/SOLR-4413
             Project: Solr
          Issue Type: Bug
    Affects Versions: 4.1, 4.0
            Reporter: Gregg Donovan


In [SVN 1420992|http://svn.apache.org/viewvc?view=revision&revision=1420992], {{SolrCore#getIndexDir()}} changed it's implementation from a version that would reflect the value of the index property in {{index.properties}} to one that does not. 

In 3.6, {{SolrCore#getIndexDir()}} was:
{code:java}
public String getIndexDir() {
  synchronized (searcherLock) {
    if (_searcher == null)	  	
      return dataDir + "index/";
    SolrIndexSearcher searcher = _searcher.get();
    return searcher.getIndexDir() == null ? dataDir + "index/" : searcher.getIndexDir();
}
{code}

In 3.6, {{SolrIndexSearcher}} would be passed the value of {{SolrCore#getNewIndexDir()}} -- which reads index.properties -- in its constructor and return it when {{SolrIndexSearcher#getIndexDir()}} was called.
 
In 4.1, {{SolrCore#getIndexDir()}} is:
{code:java}
  public String getIndexDir() {  
    return dataDir + "index/";
  }
{code}

Clients of {{SolrCore#getIndexDir()}} that were expecting the previous behavior are likely to have issues. E.g.:

--In {{CoreAdminHandler#handleUnloadAction(SolrQueryRequest, SolrQueryResponse)}} if the {{deleteIndex}} flag is set to true, it calls {{core.getDirectoryFactory().remove(core.getIndexDir())}}. If a value other than {{index/}} is set in {{index.properties}}, the wrong directory will be deleted.

--In {{CoreAdminHandler#getIndexSize(SolrCore)}}, the existence of {{SolrCore#getIndexDir()}} is checked before {{SolrCore#getNewIndexDir()}}. If a value other than {{index/}} is set in {{index.properties}}, this will return the size of the wrong directory.

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