com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:

com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: 

** BEGIN NESTED EXCEPTION ** 

java.io.EOFException

STACKTRACE:

java.io.EOFException
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1913)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2304)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2803)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1573)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3170)
at com.mysql.jdbc.Statement.executeUpdate(Statement.java:1316)
at com.mysql.jdbc.Statement.executeUpdate(Statement.java:1235)
at AerchiTask.DBTool.insert_SinaWeibo_ArticleToDB(DBTool.java:105)
at AerchiTask.WeiBoArticle.getArticleList(WeiBoArticle.java:453)
at AerchiTask.WeiBoArticle.main(WeiBoArticle.java:182)

** END NESTED EXCEPTION **

Last packet sent to the server was 1 ms ago.
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: 

** BEGIN NESTED EXCEPTION ** 

java.io.EOFException

STACKTRACE:

java.io.EOFException
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1913)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2304)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2803)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1573)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3170)
at com.mysql.jdbc.Statement.executeUpdate(Statement.java:1316)
at com.mysql.jdbc.Statement.executeUpdate(Statement.java:1235)
at AerchiTask.DBTool.insert_SinaWeibo_ArticleToDB(DBTool.java:105)
at AerchiTask.WeiBoArticle.getArticleList(WeiBoArticle.java:453)
at AerchiTask.WeiBoArticle.main(WeiBoArticle.java:182)

** END NESTED EXCEPTION **

Last packet sent to the server was 1 ms ago.
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2515)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2803)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1573)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3170)
at com.mysql.jdbc.Statement.executeUpdate(Statement.java:1316)
at com.mysql.jdbc.Statement.executeUpdate(Statement.java:1235)
at AerchiTask.DBTool.insert_SinaWeibo_ArticleToDB(DBTool.java:105)
at AerchiTask.WeiBoArticle.getArticleList(WeiBoArticle.java:453)
at AerchiTask.WeiBoArticle.main(WeiBoArticle.java:182)

 7 | current Time is : 16:01:01

------------------------------------------------------------------------------

• AutoReconnect

Add this code to your connection string:

&autoReconnect=true&failOverReadOnly=false&maxReconnects=10

原因分析：
（1）大量数据访问情况下，mysql connection连接有可能失效
（2）长时间不妨问，connection会失效

关于MySQL的wait_timeout连接超时问题报错解决方案 
Mysql服务器默认的“wait_timeout”是8小时【也就是默认的值默认是28800秒】，也就是说一个connection空闲超过8个小时，Mysql将自动断开该connection，通俗的讲就是一个连接在8小时内没有活动，就会自动断开该连接。 wait timeout的值可以设定，但最多只能是2147483，不能再大了。也就是约24.85天 
所以即使你MySQL通过my.ini 在 
# The TCP/IP Port the MySQL Server will listen on port=3306下面添加 
# this is myown dinifition for mysql connection timeout wait_timeout=31536000 
interactive_timeout=31536000 
无论超过最大限度多大的数值，只能被MySQL解析为2147483，2147483天后你的程序该出什么错还是什么错，避免不了

更多参考：
http://dev.mysql.com/doc/refman/5.1/zh/database-administration.html#dynamic-system-variables
http://www.blogjava.net/heweiya/archive/2006/01/18/28483.html

1 楼 连接字符串URL中，将localhost改成127.0.0.1，就OK了。