使用kettle同时调度多个job的时候会出现很多报错。求各位指点。：报错

2013/04/08 15:10:03 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : 一个数据库错误发生在从资源库文件读取转换时
2013/04/08 15:10:03 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : org.pentaho.di.core.exception.KettleDatabaseException: 
2013/04/08 15:10:03 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : Unable to get list of rows from ResultSet : 
2013/04/08 15:10:03 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : 
2013/04/08 15:10:03 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : Couldn't get row from result set
2013/04/08 15:10:03 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : 
2013/04/08 15:10:03 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : Unable to get value 'Integer(38)' from database resultset, index 1
2013/04/08 15:10:03 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : 无法转换为内部表示
2013/04/08 15:10:03 - Spoon - 任务已经结束.
2013/04/08 15:10:05 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : 当读共享文件时发生错误(继续加载): org.pentaho.di.core.exception.KettleException: 
2013/04/08 15:10:05 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : 无法从资源库读取数据库: 
2013/04/08 15:10:05 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : 
2013/04/08 15:10:05 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : Error loading database connection from repository (id_database=19)
2013/04/08 15:10:05 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : 
2013/04/08 15:10:05 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : Unable to get list of rows from ResultSet : 
2013/04/08 15:10:05 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : 
2013/04/08 15:10:05 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : Couldn't get row from result set
2013/04/08 15:10:05 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : 
2013/04/08 15:10:05 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : Unable to get value 'String(9999999)' from database resultset, index 4
2013/04/08 15:10:05 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : 无效的列索引
2013/04/08 15:10:05 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : org.pentaho.di.core.exception.KettleException: 
2013/04/08 15:10:05 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) : 无法从资源库读取数据库: 
2013/04/08 15:10:05 - 32_JAVADB_DW_META - ERROR (version 4.4.0-stable, build 17588 from 2012-11-21 16.02.21 by buildguy) :