Grails QuartZ插件 - I / O错误：连接重置无效状态，Connection对象关闭

Question

环境 - LINUX RHEL，SQL Server 2008 R2，Tomcat 6

我们有日常工作，它将使用REST调用从外部系统检索数据并将其填入应用程序数据库。工作即将每天运行5至6小时。但是这项工作没有完全运行，并且在任何时候通过抛出以下异常终止它。

2014-08-21 02:58:29,557 [quartzScheduler_Worker-7] ERROR util.JDBCExceptionReporter 
   - I/O Error: Connection reset
2014-08-21 02:58:29,558 [quartzScheduler_Worker-7] ERROR util.JDBCExceptionReporter 
   - Invalid state, the Connection object is closed.
2014-08-21 02:58:29,559 [quartzScheduler_Worker-7] INFO core.JobRunShell 
   - Job ALM.cyborg.tracking.ALMAutoSyncJob threw a JobExecutionException:
        org.quartz.JobExecutionException: Hibernate operation: could not inspect JDBC 
        autocommit mode; 
        uncategorized SQLException for SQL [???]; 
        SQL state [HY010]; 
        error code [0]; 
        Invalid state, the Connection object is closed.; 
        nested exception is java.sql.SQLException: 
        Invalid state, the Connection object is closed. 
        [See nested exception: 
           org.springframework.jdbc.UncategorizedSQLException: Hibernate operation: 
           could not inspect JDBC autocommit mode; uncategorized SQLException
           for SQL [???]; 
           SQL state [HY010]; 
           error code [0]; 
           Invalid state, the Connection object is closed.; 
           nested exception is java.sql.SQLException: Invalid state, 
           the Connection object is closed.]

但数据库连接没有问题。抛出此异常时，应用程序运行良好。我们已在应用程序datasource.groovy中很好地配置了DBCP属性。 可能是什么原因？有些日子工作运行3到4个小时，有些日子运行一个小时，它会在任何时间终止。