这是什么原因呢？

x70740692

[


** END NESTED EXCEPTION **



Last packet sent to the server was 1 ms ago.
    at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2586)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2874)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1623)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1715)
    at com.mysql.jdbc.Connection.execSQL(Connection.java:3243)
    at com.mysql.jdbc.Connection.setAutoCommit(Connection.java:5371)
    at com.alibaba.druid.filter.FilterChainImpl.connection_setAutoCommit(FilterChainImpl.java:547)
    at com.alibaba.druid.filter.FilterAdapter.connection_setAutoCommit(FilterAdapter.java:967)
    at com.alibaba.druid.filter.FilterChainImpl.connection_setAutoCommit(FilterChainImpl.java:543)
    at com.alibaba.druid.proxy.jdbc.ConnectionProxyImpl.setAutoCommit(ConnectionProxyImpl.java:308)
    at com.alibaba.druid.pool.DruidPooledConnection.setAutoCommit(DruidPooledConnection.java:701)
    at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doBegin(JdbcTransaction.java:72)
    ... 39 more

x70740692

http://hi.baidu.com/injava/item/fae56b2f54b7cb0f73863e42