Problem using same instance of indexSearcher for multiple requests

Question

Am using Lucene API in a .net web application. I want to use the same instance of Indexsearcher for all the requests.Hence am storing indexsearcher instance in http cache.<

Answer 1

First of all it's not safe at all, it should be:

var searcher = (IndexSearcher)HttpRuntime.Cache["IndexSearcher"];
if(searcher == null)
{
     searcher = new IndexSearcher(jobIndexFolderPath);
     HttpRuntime.Cache["IndexSearcher"] = searcher;
}

In your code cache can expire between check and assignment