项目适用kettle作为etl工具，源数据库为mysql库，目标库为oracle。在持续的循环调度中，经常发现oracle的数据库连接中断，需要重置。
具体报错信息如下：
INFO26-12 23:40:13,220 - Kitchen - Logging is at level : Basic logging
INFO26-12 23:40:13,221 - Kitchen - Start of run.
INFO26-12 23:40:13,374 - WAN_PT_OLD_SJ_DAY_ADD - Start of job execution
ERROR 26-12 23:42:50,832 - WAN_PT_OLD_SJ_DAY_ADD - A serious error occurred during job execution: org.pentaho.di.core.exception.KettleDatabaseException:
Error occured while trying to connect to the database
Invalid JNDI connection ETL : IO Error: Connection reset
INFO26-12 23:42:50,837 - Kitchen - Finished!
ERROR 26-12 23:42:50,837 - Kitchen - Finished with errors
INFO26-12 23:42:50,838 - Kitchen - Start=/12/26 23:40:13.221, Stop=/12/26 23:42:50.837
INFO26-12 23:42:50,838 - Kitchen - Processing ended after 2 minutes and
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