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我正在与hibernate.cfg的Spring MVC应用程序，如下：com.mysql.jdbc.exceptions.jdbc4.CommunicationsException：通信链路故障？
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.connection.useUnicode">true</property>
<property name="hibernate.connection.characterEncoding">UTF-8</property>
<property name="hibernate.connection.charSet">UTF-8</property>
<property name="connection.url">jdbc:mysql://10.2.10.123:3306/xxx</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.username">xxx</property>
<property name="generate_statistics">false</property>
<property name="connection.password">xxx</property>
<property name="c3p0.testConnectionOnCheckout">true</property>
<property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
<property name="c3p0.acquire_increment">1</property>
<property name="c3p0.idle_test_period">100</property> <!-- seconds -->
<property name="c3p0.max_size">50</property>
<property name="c3p0.max_statements">0</property>
<property name="c3p0.min_size">10</property>
<property name="c3p0.timeout">7200</property>
<property name="current_session_context_class">thread</property>
<property name="c3p0.numHelperThreads">5</property>
<property name="show_sql">false</property>
当我运行在本地环境中的应用，它运行没有任何问题。但是在服务器上它提供了异常，因为：
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException：通信链路故障
从服务器成功接收最后一个包是206756毫秒以前。成功发送到服务器的最后一个数据包是3毫秒前。
而且我得到以下日志：
Caused by: java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:3119)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3573)
... 90 more
DEBUG: 11:42:41.858 com.mchange.v2.resourcepool.BasicResourcePool.trace(BasicResourcePool.java:1644) - trace [email protected] [managed: 7, unused: 6, excluded: 0] (e.g. [email protected])
DEBUG: 11:42:41.861 com.mchange.v2.resourcepool.BasicResourcePool.decrementPendingAcquires(BasicResourcePool.java:422) - decremented pending_acquires: 0
DEBUG: 11:42:41.858 com.mchange.v2.resourcepool.BasicResourcePool$1DestroyResourceTask.run(BasicResourcePool.java:967) - Successfully destroyed resource: [email protected]
DEBUG: 11:42:41.861 com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.finerLoggingTestPooledConnection(C3P0PooledConnectionPool.java:323) - Test of PooledConnection [[email protected]] on CHECKOUT has FAILED.
java.sql.SQLException: Connection is invalid
谁能帮助？
尝试在MySQL连接属性中设置set auto connect'true'。 – 2014-11-04 07:48:38