advanced patterns with Spring Batch Job Execution and JobParameters in Java
I've hit a wall trying to I'm learning this framework and Quick question that's been bugging me - I'm experiencing unexpected behavior when executing a Spring Batch job that uses JobParameters to control the job flow..... I have a job that is supposed to read data from a CSV file, process it, and then write to a database. However, when I rerun the job with the same parameters, instead of processing the data again, it seems to skip the execution altogether. My job configuration looks like this: ```java @Configuration @EnableBatchProcessing public class BatchConfiguration { @Bean public Job importUserJob(JobBuilderFactory jobBuilderFactory, StepBuilderFactory stepBuilderFactory) { return jobBuilderFactory.get("importUserJob") .incrementer(new RunIdIncrementer()) .flow(step1(stepBuilderFactory)) .end() .build(); } @Bean public Step step1(StepBuilderFactory stepBuilderFactory) { return stepBuilderFactory.get("step1") .<User, User>chunk(10) .reader(reader()) .processor(processor()) .writer(writer()) .build(); } // Other beans for reader, processor, and writer } ``` I've used a `RunIdIncrementer` to ensure that each run gets a unique run ID, but I find that when I execute the job with the same parameters, it doesn't process anything. The output I see in the logs is: ``` JobExecution: JobInstance already exists and is complete. ``` I've tried adding a new parameter that changes with each execution, but that didn't resolve the scenario. I also ensured that the JobParameters are being passed correctly like so: ```java JobParameters jobParameters = new JobParametersBuilder() .addString("inputFile", "path/to/file.csv") .toJobParameters(); jobLauncher.run(importUserJob, jobParameters); ``` I don't understand why the job is being skipped instead of re-executing. Any insights on how to force the job to reprocess the data or how I can debug this scenario further? I'm using Spring Batch 5.0.0 and Spring Framework 5.3.10. This is part of a larger CLI tool I'm building. Am I missing something obvious? This is my first time working with Java 3.10. For reference, this is a production application. Thanks for any help you can provide!