spring-batch | Spring Batch training | Batch Processing library

Latest Update (with an image to hope simplify the problem) (thanks for feedback from @Mahmoud)

Relate issue reports for other reference (after this original post created, it seem someone filed issues for Spring Cloud on similar issue, so also update there too):

https://github.com/spring-cloud/spring-cloud-task/issues/793 relate to approach #1

https://github.com/spring-cloud/spring-cloud-task/issues/792 relate to approach #2

Also find a workaround resolution for that issue and update on that github issue, will update this once it is confirmed good by developer https://github.com/spring-cloud/spring-cloud-task/issues/793#issuecomment-894617929

I am developing an application involved multi-steps using spring batch job but hit some roadblock. Did try to research doc and different attempts, but no success. So thought to check if community can shed light

Spring batch job 1 (received job parameter for setting for step 1/setting for step 2)

i'm trying to read an ATM-EJ file through spring-batch using a flatFileItemReader, it reads everything perfectly except it misses any line starting with #. below is my itemReder

I have a spring batch dependency in my pom.xml declared as below:

I have a job that writes each item in one separated file. In order to do this, the job uses a ClassifierCompositeItemWriter whose the ClassifierCompositeItemWriter returns a new FlatFileItemWriter for each item (code bellow).

I made an upgrade from Spring Boot & Batch from 1.5.9 to Spring Boot & Batch 2.5.6. Now I have an issue with the Spring Batch schema initialization. I am running H2 in a JUnit5 test class. First try is to initialzise via Spring Batch with:

i'm trying to read an excel fine using spring-batch extension (spring-batch-excel) with PoiItemReader. i'm getting following error when trying to read an excel file through below configurations.

The Error:

I'm working on a simple Spring Batch application, and when I finished configuring it, I found that problem:

The dependencies of some of the beans in the application context form a cycle:

jobRestController defined in file [/home/yassine/Downloads/demo/target/classes/com/example/demo/JobRestController.class] springBatchConfig defined in file [/home/yassine/Downloads/demo/target/classes/com/example/demo/SpringBatchConfig.class]

Action:

Relying upon circular references is discouraged and they are prohibited by default. Update your application to remove the dependency cycle between beans. As a last resort, it may be possible to break the cycle automatically by setting spring.main.allow-circular-references to true.

The implementation of the two classes:

SpringBatchConfig:

I have a Spring Boot servlet web application packaged as a WAR. When I use Spring Boot version 2.5.5 it runs fine. I just upgraded the app to Spring Boot version 2.6.0 and now I get the following error when deploying WAR to Tomcat 8.5.59:

I'm trying to run a java 8 batch with a jdk17, the project is built with a jre1.8.0_192 and I put the following options in the VM:

--add-modules=ALL-SYSTEM --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.math=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=jdk.attach/sun.tools.attach=ALL-UNNAMED -Djava.locale.providers=JRE,SPI

I get the following error at runtime:

java.lang.NullPointerException: Cannot invoke "Object.getClass()" because "obj" is null at java.lang.reflect.Method.invoke(Method.java:561) ~[?:?] at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333) ~[spring-aop-4.3.25.RELEASE.jar:4.3.25.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) ~[spring-aop-4.3.25.RELEASE.jar:4.3.25.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.3.25.RELEASE.jar:4.3.25.RELEASE] at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$PassthruAdvice.invoke(SimpleBatchConfiguration.java:127) ~[spring-batch-core-3.0.10.RELEASE.jar:3.0.10.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.25.RELEASE.jar:4.3.25.RELEASE] at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213) ~[spring-aop-4.3.25.RELEASE.jar:4.3.25.RELEASE]

Any ideas ? Thanks