1. HttpClient连接池原理及一次连接时序图, 见:http://www.haogongju.net/art/1928653
2. HttpClient连接池抛出大量ConnectionPoolTimeoutException: Timeout waiting for connection异常排查 http://blog.csdn.net/shootyou/article/details/6615051
3. 再谈应用环境下的TIME_WAIT和CLOSE_WAIT http://blog.csdn.net/shootyou/article/details/6622226 17jquery.com
4. 如果要自动重发的话, 参考:http://www.oschina.net/code/explore/android-2.2-froyo/org/apache/http/impl/client/DefaultHttpClient.java
http://ouqi.iteye.com/blog/1844284