org.apache.ibatis.exceptions.PersistenceException:

今天在mybatis项目中，突然出现下面的错误：

org.apache.ibatis.exceptions.PersistenceException:
### Error querying database.  Cause: org.apache.ibatis.transaction.TransactionException: Error configuring AutoCommit.  Your driver may not support getAutoCommit() or setAutoCommit(). Requested setting: false.  Cause: java.sql.SQLNonTransientConnectionException: Could not send query: Last packet not finished
### The error may exist in cn/com/topsec/mapper/PictureMapper.xml
### The error may involve cn.com.topsec.mapper.PictureMapper.list
### The error occurred while executing a query
### Cause: org.apache.ibatis.transaction.TransactionException: Error configuring AutoCommit.  Your driver may not support getAutoCommit() or setAutoCommit(). Requested setting: false.  Cause: java.sql.SQLNonTransientConnectionException: Could not send query: Last packet not finished

出现这个问题也是偶然，重启tomcat后，问题就不再存在了。

解决此问题，需要在mybatis(iBatis)的配置文件中加入两个属性：poolPingQuery 和 poolPingEnabled。

  
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