要求：
从包含 100K 记录的文件中读取。
对于每条记录，从 IBM DB2 数据库表中检索数据，然后从 NuoDB 数据库表中检索数据。
最后，在 NuoDB 数据库表中插入更新的记录。
设计方法：面向块的处理，其中 1000 条记录将从文件中读取并处理并写入数据库。
问题：大约 75K 记录并运行近 5 小时后，批处理应用程序失败并出现以下错误：
Hibernate: select ... the SELECT query for DB2
Hibernate: select ... the SELECT query for NuoDB
2020-06-08 22:00:00.187 INFO [ ,,,] 32215 --- [ Thread-9] ConfigServletWebServerApplicationContext : Closing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@2a7f1f10: startup date [Mon Jun 08 17:22:51 BST 2020]; parent: org.springframework.context.annotation.AnnotationConfigApplicationContext@3972a855
2020-06-08 22:00:00.192 INFO [ ,,,] 32215 --- [ Thread-9] o.s.c.support.DefaultLifecycleProcessor : Stopping beans in phase 0
2020-06-08 22:00:00.193 INFO [ ,,,] 32215 --- [ Thread-9] o.s.i.endpoint.EventDrivenConsumer : Removing {logging-channel-adapter:_org.springframework.integration.errorLogger} as a subscriber to the 'errorChannel' channel
2020-06-08 22:00:00.193 INFO [ ,,,] 32215 --- [ Thread-9] o.s.i.channel.PublishSubscribeChannel : Channel ' -1.errorChannel' has 0 subscriber(s).
2020-06-08 22:00:00.193 INFO [ ,,,] 32215 --- [ Thread-9] o.s.i.endpoint.EventDrivenConsumer : stopped _org.springframework.integration.errorLogger
2020-06-08 22:00:00.195 INFO [ ,,,] 32215 --- [ Thread-9] o.s.s.c.ThreadPoolTaskScheduler : Shutting down ExecutorService 'taskScheduler'
2020-06-08 22:00:00.196 INFO [ ,,,] 32215 --- [ Thread-9] o.s.jmx.export.MBeanExporter : Unregistering JMX-exposed beans on shutdown
2020-06-08 22:00:00.203 INFO [ ,,,] 32215 --- [ Thread-9] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2020-06-08 22:00:00.203 INFO [ ,,,] 32215 --- [ Thread-9] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2020-06-08 22:00:00.203 INFO [ ,,,] 32215 --- [ Thread-9] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2020-06-08 22:00:00.203 INFO [ ,,,] 32215 --- [ Thread-9] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2020-06-08 22:00:00.203 INFO [ ,,,] 32215 --- [ Thread-9] com.zaxxer.hikari.HikariDataSource : HikariPool-3 - Shutdown initiated...
2020-06-08 22:00:00.210 INFO [ ,,,] 32215 --- [ Thread-9] com.zaxxer.hikari.HikariDataSource : HikariPool-3 - Shutdown completed.
2020-06-08 22:00:00.210 INFO [ ,,,] 32215 --- [ Thread-9] com.zaxxer.hikari.HikariDataSource : HikariPool-2 - Shutdown initiated...
2020-06-08 22:00:00.211 INFO [ ,,,] 32215 --- [ Thread-9] com.zaxxer.hikari.HikariDataSource : HikariPool-2 - Shutdown completed.
2020-06-08 22:00:00.212 INFO [ ,,,] 32215 --- [ Thread-9] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...
2020-06-08 22:00:00.214 INFO [ ,,,] 32215 --- [ Thread-9] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.
这个问题的真正原因可能是什么？这就像数据库不能在 4-6 小时内定期触发 10 万次 SELECT 查询一样吗？
我在调试模式下使用日志级别重新运行应用程序，这是我得到的错误：
com.ibm.db2.jcc.am.DisconnectNonTransientConnectionException: [jcc][t4][2030][11211][4.19.72] A communication error occurred during operations on the connection's underlying socket, socket input stream,
or socket output stream. Error location: Command timeout check. Message: Command timed out. ERRORCODE=-4499, SQLSTATE=08001