TL;DR
Spring boot batch job does not get launched as an uber jar on windows or in Spring Cloud Data Flow; however, the same code works just fine when launched in Eclipse.
I created a simple Spring batch job using Spring Boot. I wanted to run this job on Kubernetes. I followed the steps mentioned in this guide on how to launch a Spring batch job in SCDF (Spring Cloud Data Flow). When I register this app and create a task as mentioned in the guide, a new pod is created in Kubernetes and the application runs fine; however, the batch job never gets launched. What could be the reason for this?
My Spring Boot batch application code :
Main Class
@SpringBootApplication
public class BatchApplication {
public static void main(String[] args) {
SpringApplication.run(BatchApplication.class, args);
}
}
Job configuration
@Configuration
@EnableTask
@EnableBatchProcessing
@Profile("master")
public class BatchJob {
@Autowired
private JobBuilderFactory jobBuilderFactory;
@Autowired
private StepBuilderFactory stepBuilderFactory;
public static final String JOB_NAME = "myJob";
private static final Logger LOGGER = Logger.getLogger(BatchJob .class);
@Bean(name = JOB_NAME )
public Job job() {
LOGGER.info("Creating job bean...");
return jobBuilderFactory.get(JOB_NAME).incrementer(new RunIdIncrementer())
.start(helloWorldStep()).build();
}
@Bean
public Step helloWorldStep() {
LOGGER.info("Creating Step bean...");
return stepBuilderFactory.get("helloWorldStep").tasklet(helloWorldTasklet()).build();
}
@Bean
public HelloWorldTasklet helloWorldTasklet() {
LOGGER.info("Creating tasklet...");
return new HelloWorldTasklet();
}
}
HelloWorldTasklet
public class HelloWorldTasklet implements Tasklet {
private static final Logger LOGGER = Logger.getLogger(HelloWorldTasklet.class);
@Override
public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {
LOGGER.info("Hello World");
System.out.println("Hello World Again");
return RepeatStatus.FINISHED;
}
}
application.properties
spring.application.name=my-batch-app
spring.datasource.url=jdbc:h2:mem:dataflow
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=
spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
spring.cloud.task.closecontext_enabled=true
pom.xml dependencies
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>my-project-parent</artifactId>
<groupId>com.myapp</groupId>
<version>MAR21_1.0</version>
</parent>
<groupId>com.myapp</groupId>
<artifactId>my-batch-app</artifactId>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-batch</artifactId>
<version>2.3.11.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<version>2.3.11.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<version>2.3.11.RELEASE</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17-cloudera1</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.199</version>
<!--<scope>runtime</scope>-->
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>2.1.0.RELEASE</version>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
Where my-project-parent is the parent module for all my projects containing only defintions for jar versions. However, I am not really using any of these versions defined in this pom in my-batch-app as of now.
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.myapp</groupId>
<artifactId>my-project-parent</artifactId>
<version>MAR21_1.0</version>
<packaging>pom</packaging>
<name>my-project-parent</name>
<properties>
<java.version>1.8</java.version>
<spring.kafka.version>2.5.5.RELEASE</spring.kafka.version> <spring.cloud.starter.task.version>2.2.4.RELEASE</spring.cloud.starter.task.version> <spring.boot.starter.data.jpa.version>2.2.1.RELEASE</spring.boot.starter.data.jpa.version>
<database.h2.version>1.4.199</database.h2.version> <spring.cloud.dataflow.rest.client.version>2.7.1</spring.cloud.dataflow.rest.client.version>
<jackson-datatype-jsr310.version>2.10.0</jackson-datatype-jsr310.version>
<spring.batch.version>4.2.4.RELEASE</spring.batch.version>
<log4jversion>1.2.17-cloudera1</log4jversion>
</properties>
<build>
<plugins>
<!-- Maven Compiler Plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
I registered the docker image for the above application, created a task and launched the task from the SCDF UI. I don't see the Spring Batch step or job logs in my pod logs. Infact, I don't see the System.out.println or all the log statements statements that I have added all around the code in the logs.
The pod seems to be running BatchApplication class but does not seem to be launching the job at all. What am I missing?
The same problem is observed even if I run the jar on windows as a spring boot uber jar
Picked up _JAVA_OPTIONS: -Djdk.tls.maxCertificateChainLength=20
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.5.RELEASE)
2021-06-07 16:23:58.021 INFO 1 --- [ main] .r.c.b.w.b.c.o.BatchApplication : Starting BatchApplication on batch-controller-test-5wg6eryzpj with PID 1 (/tmp/my-batch-app.jar started by ? in /tmp)
2021-06-07 16:23:58.026 INFO 1 --- [ main] .r.c.b.w.b.c.o.BatchApplication : The following profiles are active: master
2021-06-07 16:24:03.031 INFO 1 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2021-06-07 16:24:03.316 INFO 1 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 185ms. Found 0 JPA repository interfaces.
2021-06-07 16:24:04.917 INFO 1 --- [ main] faultConfiguringBeanFactoryPostProcessor : No bean named 'errorChannel' has been explicitly defined. Therefore, a default PublishSubscribeChannel will be created.
2021-06-07 16:24:04.935 INFO 1 --- [ main] faultConfiguringBeanFactoryPostProcessor : No bean named 'taskScheduler' has been explicitly defined. Therefore, a default ThreadPoolTaskScheduler will be created.
2021-06-07 16:24:04.949 INFO 1 --- [ main] faultConfiguringBeanFactoryPostProcessor : No bean named 'integrationHeaderChannelRegistry' has been explicitly defined. Therefore, a default DefaultHeaderChannelRegistry will be created.
2021-06-07 16:24:06.814 INFO 1 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.integration.config.IntegrationManagementConfiguration' of type [org.springframework.integration.config.IntegrationManagementConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-06-07 16:24:07.047 INFO 1 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'integrationChannelResolver' of type [org.springframework.integration.support.channel.BeanFactoryChannelResolver] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-06-07 16:24:07.113 INFO 1 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'integrationDisposableAutoCreatedBeans' of type [org.springframework.integration.config.annotation.Disposables] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-06-07 16:24:09.125 INFO 1 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2021-06-07 16:24:09.822 INFO 1 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2021-06-07 16:24:10.512 INFO 1 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2021-06-07 16:24:11.220 INFO 1 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.4.8.Final}
2021-06-07 16:24:12.724 INFO 1 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
2021-06-07 16:24:14.019 INFO 1 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2021-06-07 16:24:16.335 INFO 1 --- [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2021-06-07 16:24:16.429 INFO 1 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2021-06-07 16:24:19.814 INFO 1 --- [ main] o.s.s.c.ThreadPoolTaskScheduler : Initializing ExecutorService 'taskScheduler'
2021-06-07 16:24:21.721 INFO 1 --- [ main] o.s.i.endpoint.EventDrivenConsumer : Adding {logging-channel-adapter:_org.springframework.integration.errorLogger} as a subscriber to the 'errorChannel' channel
2021-06-07 16:24:21.721 INFO 1 --- [ main] o.s.i.channel.PublishSubscribeChannel : Channel 'application.errorChannel' has 1 subscriber(s).
2021-06-07 16:24:21.722 INFO 1 --- [ main] o.s.i.endpoint.EventDrivenConsumer : started bean '_org.springframework.integration.errorLogger'
2021-06-07 16:24:21.818 INFO 1 --- [ main] .r.c.b.w.b.c.o.BatchApplication : Started BatchApplication in 27.903 seconds (JVM running for 31.116)
2021-06-07 16:24:21.828 INFO 1 --- [extShutdownHook] o.s.i.endpoint.EventDrivenConsumer : Removing {logging-channel-adapter:_org.springframework.integration.errorLogger} as a subscriber to the 'errorChannel' channel
2021-06-07 16:24:21.830 INFO 1 --- [extShutdownHook] o.s.i.channel.PublishSubscribeChannel : Channel 'application.errorChannel' has 0 subscriber(s).
2021-06-07 16:24:21.830 INFO 1 --- [extShutdownHook] o.s.i.endpoint.EventDrivenConsumer : stopped bean '_org.springframework.integration.errorLogger'
2021-06-07 16:24:21.832 INFO 1 --- [extShutdownHook] o.s.s.c.ThreadPoolTaskScheduler : Shutting down ExecutorService 'taskScheduler'
2021-06-07 16:24:21.916 INFO 1 --- [extShutdownHook] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2021-06-07 16:24:21.917 INFO 1 --- [extShutdownHook] .SchemaDropperImpl$DelayedDropActionImpl : HHH000477: Starting delayed evictData of schema as part of SessionFactory shut-down'
2021-06-07 16:24:21.920 INFO 1 --- [extShutdownHook] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...
2021-06-07 16:24:22.014 INFO 1 --- [extShutdownHook] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.
JAR contents
Just to make things more clear, this is the list of folders that I see in the JAR. It looks like spring boot maven plugin was used to create the jar? Why then does the batch job not launch outside of Eclipse :
--my-batch-app.jar
- BOOT-INF
- classes
- lib
- META-INF
- org
Note : As you can see, the logs also show that the master profile was indeed picked because I passed --spring.profiles.active=master as the input argument when launching the task.
java -jar myapp.jarand see if you batch job get launched? You need to make sure to correctly run your app locally before proceeding to docker and kubernetes. – Mahmoud Ben Hassinejava -cp dependency/* -jar my-batch-app.jarbut this did not work. – Pingjava -jar myapp.jar: docs.spring.io/spring-boot/docs/current/maven-plugin/reference/… – Mahmoud Ben Hassine