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java.net.ConnectException: Connection timed out in HttpClient

 
Manju Havald
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I’m getting Connection timed out after processing about 20 records in HttpClient (code snippet is shown below). My requirement is to process about 30 records one after the other and read the response for each request.
Please let me known how to fix this limitation.

Code:
---------
import java.io.IOException;
import java.net.MalformedURLException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.CoreConnectionPNames;
import org.apache.http.params.CoreProtocolPNames;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;

public class Consumer {

public static void main(String[] args) {

Consumer consumer = new Consumer();
DefaultHttpClient httpClient = consumer.getHttpClientConnection("userId", "encrypted Password");
HttpPost postMethod = new HttpPost("https://destination.com/.../serviceName");

int loopCount = 30; // I need to send about 30 records one after the other. Here i kept loop count of 30 for testing purpose
for (int i = 0; i < loopCount; i++) {
System.out.println("Processing loop[" + i +"]");
consumer.sendHttpPostRequest(httpClient, postMethod);
}
consumer.closeHttpClientConnection(httpClient);
}

public DefaultHttpClient getHttpClientConnection(String userId, String encryptedPwd) {

HttpParams params = new BasicHttpParams();
params.setParameter(CoreProtocolPNames.PROTOCOL_VERSION,
HttpVersion.HTTP_1_1);
params.setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 0);
params.setParameter(CoreConnectionPNames.SO_TIMEOUT, 0);
params.setParameter(CoreConnectionPNames.TCP_NODELAY, true);
DefaultHttpClient httpClient = new DefaultHttpClient(params);

httpClient.getCredentialsProvider().setCredentials(
new AuthScope(AuthScope.ANY_HOST, AuthScope.ANY_PORT),
new UsernamePasswordCredentials(userId, encryptedPwd));

return httpClient;
}

public void sendHttpPostRequest(DefaultHttpClient httpClient,
HttpPost postMethod) {

try {
HttpContext localContext = new BasicHttpContext();
HttpResponse response = httpClient.execute(postMethod, localContext);
HttpEntity resEntity = response.getEntity();
EntityUtils.consume(resEntity);
} catch (MalformedURLException e) {
postMethod.abort();
e.printStackTrace();
} catch (IOException e) {
postMethod.abort();
e.printStackTrace();
}
}

public void closeHttpClientConnection(DefaultHttpClient httpClient) {
httpClient.getConnectionManager().closeExpiredConnections();
httpClient.getConnectionManager().shutdown();
System.gc();
}
}


Exception:
----------------
org.apache.http.conn.HttpHostConnectException: Connection to https://.....com refused
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:158)
at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:150)
at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:121)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:575)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:425)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:820)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:754)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:732)
..........
.........
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(Unknown Source)
at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:375)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:148)
... 10 more
 
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