项目中用到Hibernate，部署的时候发现，过了一段时间后，Hibernate就不能正常工作了，时间很有规律，通常是在部署后的若干个小时。错误日志如下：

** BEGIN NESTED EXCEPTION **

java.net.SocketTimeoutException
MESSAGE: Read timed out

STACKTRACE:

java.net.SocketTimeoutException: Read timed out
    at java.net.SocketInputStream.socketRead0(Native Method)
    at java.net.SocketInputStream.read(Unknown Source)
    at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1392)
    at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:1539)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1930)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1168)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1279)
    at com.mysql.jdbc.MysqlIO.sqlQuery(MysqlIO.java:1225)
    at com.mysql.jdbc.Connection.execSQL(Connection.java:2278)
    at com.mysql.jdbc.Connection.execSQL(Connection.java:2237)
    at com.mysql.jdbc.Connection.execSQL(Connection.java:2218)
    at com.mysql.jdbc.Connection.commit(Connection.java:1155)
    at org.hibernate.transaction.JDBCTransaction.commitAndResetAutoCommit(JDBCTransaction.java:139)
    at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:115)
    at com.amd.BizB.test(BizB.java:27)
    at org.apache.jsp.index_jsp._jspService(index_jsp.java:109)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Unknown Source)

最后发现是由于配置文件Hibernate.cfg.xml没有写好，少加了若干的项(注意黑体部分)

<property name=”connection.autocommit”>true</property>

<property name=”connection.url”>jdbc:mysql://ssuzsws01:3306/foo?autoReconnect=true</property>

加了这些选项后，就正常了，希望对遇到类似问题的朋友有帮助。