PoolingHttpClientConnectionManager allows only limited connection to the host at a time

Question

My application's requirement is to run on multithreaded environment. I am using PoolingHttpClientConnectionManager to maintain pool of 20 connections per route.

PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();   

cm.setMaxTotal(200);
cm.setDefaultMaxPerRoute(20);

I am getting the HttpClient from this connection Manager and trying to execute the get request by multiple treads.

ExecutorService executor = Executors.newFixedThreadPool(50);

                for(int k =0; k <25; k++){       
                     executor.execute(getData);
                }
                executor.shutdown();

getData method is executing HttpGet request by using the HttpClient.

But the issue is, only 5-6 connection are being used at a time, instead of 20 mentioned above. So the HttpClient seems to blocking the connection call. Has anyone encounter the same issue or has better solution to it.