09:00:30.307 [http-8080-6] ERROR org.hibernate.transaction.JDBCTransaction -JDBC begin failed

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 56,237,340 milliseconds ago.  The last packet sent successfully to the server was 1 milliseconds ago.

	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.6.0_13]

	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) ~[na:1.6.0_13]

	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) ~[na:1.6.0_13]

	at java.lang.reflect.Constructor.newInstance(Constructor.java:513) ~[na:1.6.0_13]

	at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) ~[mysql-connector-java-5.1.21.jar:na]

	at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1117) ~[mysql-connector-java-5.1.21.jar:na]

	at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3567) ~[mysql-connector-java-5.1.21.jar:na]

	at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3456) ~[mysql-connector-java-5.1.21.jar:na]

	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3997) ~[mysql-connector-java-5.1.21.jar:na]

	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2468) ~[mysql-connector-java-5.1.21.jar:na]

	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2629) ~[mysql-connector-java-5.1.21.jar:na]

	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2713) ~[mysql-connector-java-5.1.21.jar:na]

	at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:5060) ~[mysql-connector-java-5.1.21.jar:na]

	at org.apache.commons.dbcp.DelegatingConnection.setAutoCommit(DelegatingConnection.java:371) ~[commons-dbcp-1.4.jar:1.4]

	at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.setAutoCommit(PoolingDataSource.java:328) ~[commons-dbcp-1.4.jar:1.4]

	at sun.reflect.GeneratedMethodAccessor55.invoke(Unknown Source) ~[na:na]

	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0_13]

	at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_13]

	at net.bull.javamelody.JdbcWrapper$ConnectionInvocationHandler.invoke(JdbcWrapper.java:185) ~[javamelody-1.49.0.jar:na]

	at net.bull.javamelody.JdbcWrapper$DelegatingInvocationHandler.invoke(JdbcWrapper.java:282) ~[javamelody-1.49.0.jar:na]

	at $Proxy36.setAutoCommit(Unknown Source) ~[na:na]

	at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:91) ~[hibernate-core-3.5.6-Final.jar:3.5.6-Final]

	at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1463) [hibernate-core-3.5.6-Final.jar:3.5.6-Final]

	at org.springframework.orm.hibernate3.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:555) [spring-orm-3.1.1.RELEASE.jar:3.1.1.RELEASE]

	at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371) [spring-tx-3.1.1.RELEASE.jar:3.1.1.RELEASE]

	at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:335) [spring-tx-3.1.1.RELEASE.jar:3.1.1.RELEASE]

	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105) [spring-tx-3.1.1.RELEASE.jar:3.1.1.RELEASE]

	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) [spring-aop-3.1.1.RELEASE.jar:3.1.1.RELEASE]

	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) [spring-aop-3.1.1.RELEASE.jar:3.1.1.RELEASE]

	at $Proxy72.findPageByORMSearch(Unknown Source) [na:na]

网上看到这两个解决办法。验证中。