How to get ThreadSafeClientConnManager not to lock

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I am using httpcomponents 4.1.2 and the ThreadSafeClientConnManager runs out of connections. There does not appear to be any way to release a connection unlike the older commons HttpClient. My goal is to have a number of concurrent threads doing HTTP POSTs to a URL. Anyone have an idea of how to 'release' the connections? Or should i be doing it a different way?\[code\]import java.util.ArrayList;import java.util.List;import org.apache.http.HttpResponse;import org.apache.http.NameValuePair;import org.apache.http.client.HttpClient;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;import org.apache.http.message.BasicNameValuePair;import org.apache.http.protocol.HTTP;public class HttpThread implements Runnable{ private static ThreadSafeClientConnManager cm; private static HttpClient httpClient; static { cm = new ThreadSafeClientConnManager(); cm.setDefaultMaxPerRoute( 10 ); cm.setMaxTotal( 100 ); httpClient = new DefaultHttpClient( cm ); } private String id; private int iterations; public HttpThread( String id, int iterations ) { this.id= id; this.iterations = iterations; } @Override public void run() { long start = System.currentTimeMillis(); for( int i = 0; i < this.iterations; i++ ) { HttpPost post = new HttpPost( "http://127.0.0.1:7001/in/iServlet" ); List<NameValuePair> nvps = new ArrayList<NameValuePair>(); nvps.add( new BasicNameValuePair( "p1", "0123456789" ) ); nvps.add( new BasicNameValuePair( "p2", "7" ) ); nvps.add( new BasicNameValuePair( "p3", "80027-48taPS4lQVu7q6RjEA40kg-1207276200-75-2-1-0" ) ); nvps.add( new BasicNameValuePair( "p4", "1-30--1-2-_60--2-Y-RED,XL__2-30-5-3-A-" ) ); try { post.setEntity( new UrlEncodedFormEntity( nvps, HTTP.UTF_8 ) ); System.out.println("before post: " + i); HttpResponse response = httpClient.execute( post ); System.out.println("after post: " + i); } catch( Exception e ) { e.printStackTrace(); } finally { } } long stop = System.currentTimeMillis(); System.out.println( this.id + " finished: " + (stop - start) + " ms" ); }}\[/code\]With my driver being:\[code\]public class ThreadTest{ private ExecutorService executor = Executors.newCachedThreadPool(); protected void spawnThreads( int numberOfThreads, int iterations ) { for( int i = 1; i <= numberOfThreads; i++ ) { HttpThread thread = new HttpThread( "thread-" + i, 100 ); executor.execute( thread ); System.out.println( "Launching: thread-" + i + " for: " + iterations + " iterations" ); } } public static void main(String[] args) { ThreadTest t= new ThreadTest(); t.spawnThreads( 1, 100 ); }}\[/code\]My output is then:\[code\]Launching: thread-1 for: 100 iterationsbefore post: 0after post: 0before post: 1after post: 1before post: 2after post: 2before post: 3after post: 3before post: 4after post: 4before post: 5after post: 5before post: 6after post: 6before post: 7after post: 7before post: 8after post: 8before post: 9after post: 9before post: 10\[/code\]