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From "Zhihong Zhang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HTTPCLIENT-813) HttpClient throws NPE on Invalid Port when used with MultiThreadedHttpConnectionManager
Date Thu, 08 Jan 2009 16:10:59 GMT

    [ https://issues.apache.org/jira/browse/HTTPCLIENT-813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12662021#action_12662021
] 

Zhihong Zhang commented on HTTPCLIENT-813:
------------------------------------------

You said 4.0 doesn't throw exception at all. That's not right behavior either. Since the input
is invalid, it should throw a checked exception.

We want to switch to 4.0 but we have a policy not to use software in beta. Do you have an
estimate on the official release?

Thanks for your quick response.

Zhihong

> HttpClient throws NPE on Invalid Port when used with MultiThreadedHttpConnectionManager
> ---------------------------------------------------------------------------------------
>
>                 Key: HTTPCLIENT-813
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-813
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: HttpClient
>    Affects Versions: 3.1 Final
>         Environment: Linux AS 3.1/Java 1.5
>            Reporter: Zhihong Zhang
>         Attachments: HttpTest.java, HttpTest2.java
>
>
> The HttpClient throws NullPointerException in the main thread when an invalid port (like
80001) is used in the URL. An IllegalArgumentException is thrown in TimeoutGuard thread.
>  
> Exception in thread "Timeout guard" java.lang.IllegalArgumentException: port out of range:80001
> 	at java.net.InetSocketAddress.<init>(InetSocketAddress.java:118)
> 	at java.net.Socket.<init>(Socket.java:240)
> 	at org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:80)
> 	at org.apache.commons.httpclient.protocol.ControllerThreadSocketFactory$1.doit(ControllerThreadSocketFactory.java:91)
> 	at org.apache.commons.httpclient.protocol.ControllerThreadSocketFactory$SocketTask.run(ControllerThreadSocketFactory.java:158)
> 	at java.lang.Thread.run(Thread.java:613)
> Exception in thread "main" java.lang.NullPointerException
> 	at org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:721)
> 	at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionAdapter.open(MultiThreadedHttpConnectionManager.java:1361)
> 	at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:387)
> 	at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
> 	at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
> 	at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
> 	at com.aol.test.HttpTest$PoolingHttpConnector.doGet(HttpTest.java:47)
> 	at com.aol.test.HttpTest.main(HttpTest.java:17)
> It should throw a checked exception in main thread so caller can handle the error condition
more gracefully.
> The test program is attached. This is caused by a race condition and it's not always
reproducible. Running in debugger shows a different behavior.
> package com.aol.test;
> import java.io.IOException;
> import org.apache.commons.httpclient.HttpClient;
> import org.apache.commons.httpclient.HttpStatus;
> import org.apache.commons.httpclient.MultiThreadedHttpConnectionManager;
> import org.apache.commons.httpclient.methods.GetMethod;
> import org.apache.commons.httpclient.params.HttpConnectionManagerParams;
> public class HttpTest {
> 	
> 	public static void main(String[] args) {
> 		PoolingHttpConnector conn = new PoolingHttpConnector();
> 		
> 		try {
> 			String response = conn.doGet("http://www.aol.com:80001");
> 			System.out.println("Response='" + response + "'");
> 		} catch (IOException e) {
> 			e.printStackTrace();
> 		}
> 	}
> 	static class PoolingHttpConnector {
> 		
> 		public static final int MAX_TOTAL_CONNECTIONS = 16;
> 		public static final int MAX_CONNECTIONS_PER_HOST = 8;
> 		public static final int CONNECT_TIMEOUT = 5000;
> 		public static final int SOCKET_TIMEOUT = 5000;
> 		public static final boolean TCP_NO_DELAY = true;
> 		
> 	    private static MultiThreadedHttpConnectionManager poolManager;
> 	    private static HttpConnectionManagerParams httpParams;
> 	    private static HttpClient httpClient;
> 	    private static boolean initialized = false;
> 	    
> 		public PoolingHttpConnector() 
> 		{
> 			initialize();
> 		}
> 		public String doGet(String url) throws IOException {
> 			GetMethod method = new GetMethod(url);
> 					
> 			try {
> 	            int status = httpClient.executeMethod(method);	            
> 		        String response = new String(method.getResponseBody());
> 	            
> 	            if (status != HttpStatus.SC_OK)
> 	            	throw new IOException("HTTP error: " + response);
> 	            
> 	            return response;
> 	            
> 			} finally {
> 	            method.releaseConnection();
> 			}
> 	 	} 	
> 	
> 		private synchronized void initialize() {	
> 			if (initialized)
> 				return;
> 			
> 	        poolManager = new MultiThreadedHttpConnectionManager();
> 	        httpParams = new HttpConnectionManagerParams();
> 	        
> 	        httpParams.setMaxTotalConnections(MAX_TOTAL_CONNECTIONS);
> 	        httpParams.setDefaultMaxConnectionsPerHost(MAX_CONNECTIONS_PER_HOST);
> 	        httpParams.setTcpNoDelay(TCP_NO_DELAY);
> 	        httpParams.setSoTimeout(SOCKET_TIMEOUT);
> 	        httpParams.setConnectionTimeout(CONNECT_TIMEOUT);
> 	        
> 	        poolManager.setParams(httpParams);
> 	        httpClient = new HttpClient(poolManager);
> 			initialized = true;
> 		}
> 		
> 	}
> }

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