如何使用lucene.net查询Solr索引

Question

I have and index created using solr DIH. I want to query that index data using the Lucene.net library.

the path of solr index is D:\\Tests\\solr\\example\\example-DIH\\solr\\db\\data\\index

the code I use to create lucene index directory object is as follows:

Analyzer anz = new StandardAnalyzer();
Directory dir = 
 FSDirectory.GetDirectory(@"D:\Tests\solr\example\example DIH\solr\db\data\index", false);
IndexSearcher isearcher = new IndexSearcher(dir);

while executing the last line of code I get the following exception:

Could not find file 'D:\\Tests\\solr\\example\\example-DIH\\solr\\db\\data\\index\\segments'.

Given that the files within my solr index folder are

• _0.fdt
• _0.fdx
• _0.fnm
• _0.frq
• _0.nrm
• _0.prx
• _0.tii
• _0.tis
• segments.gen
• segments_2

So what is the problem??

Answer 1

Lucene.NET is only up to Lucene version 2.9.2.2 or so while solr is running on Lucene 2.9.3. This means that Lucene.NET can't index a SOLR index so easily.

Now, what you can do is use something like SolrSharp to access Solr directly, sidestepping this version issue.