java - Spring Batch应用程序sqlcode -4499 sqlstate 08001

Question

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，将更新的记录插入NuoDB数据库表中。

设计方法:面向 block 的处理，将从文件中读取 1000 条记录并进行处理并写入数据库。

问题:在大约 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.

此问题的实际原因是什么？这就像数据库无法定期触发 100K 次 SELECT 查询 4-6 小时一样吗？

我在 Debug模式下以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

Answer 1

您的数据库连接似乎已丢失。您需要重新启 Action 业实例。如果配置正确，您的作业应该从失败后停止的地方重新启动。