今天在使用java jsoup操作remote server的是否，在本地执行可以成功返回内容，然后打成jar包，使用shell在 server上执行就反问错误。
java.net.SocketException: Unexpected end of file from serversun.net.(HttpClient.java:772)sun.net.(HttpClient.java:633)sun.net.(HttpClient.java:769)sun.net.(HttpClient.java:633)sun.net.(HttpURLConnection.java:1323)java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:468)org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:516)org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:493)org.jsoup.helper.HttpConnection.execute(HttpConnection.java:205)org.jsoup.helper.HttpConnection.get(HttpConnection.java:194)
在stackoverflow 上面找到同样的问题,原因是remote server 接收request，并立马关闭了request，而没有返回response；具体原因得看 trace packets，，so，得安装wiresharksudo apt-get install wireshark
但是没有那么顺利，不然就不会有这边文章了。
因为执行上面的命令之后，发现如下错误：404 Not Found [IP: 137.189.4.14 80]
sudo apt-get update 也没有办法解决，
然后baidu了一下，发现了这边blog有办法。发现是因为Ubuntu13.10 这个版本的源有变化导致的。更新为14.04可以解决，但是这可是正在运行的服务器，不敢冒着险。不过也可以更新源。mv /etc/apt/sources.list /etc/apt/sources.list_20150807touch /etc/apt/sources.listvi /etc/apt/sources.list
然后copy一下内容
deb raring main universe restricted multiversedeb-src raring main universe restricted multiversedeb raring-security main universe restricted multiversedeb-src raring-security main universe restricted multiversedeb raring-updates main universe restricted multiversedeb-src raring-updates main universe restricted multiversedeb raring-backports main restricted universe multiversedeb-src raring-backports main restricted universe multiversedeb raring-proposed main restricted universe multiversedeb-src raring-proposed main restricted universe multiverse
然后保存退出。sudo apt-get updatesudo apt-get install wiresharkdone.
网络抓包工具Wireshark的简单使用
Ubuntu 12.04 下安装Wireshark
Linux中从普通用户启动Wireshark抓包
Linux下安装和运行Wireshark
Wireshark 的详细介绍：请点这里Wireshark 的下载地址：请点这里
本文永久更新链接地址：
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