org.springframework.batch.core.repository.JobInstanceAlreadyCompleteException: A job instance already exists and is complete for parameters

Spring Batch requires unique job parameters for its execution.so you can add the current time as a job parameter Map<String, JobParameter> confMap = new HashMap<String, JobParameter>(); confMap.put("time", new JobParameter(System.currentTimeMillis())); JobParameters jobParameters = new JobParameters(confMap); jobLauncher.run(springCoreJob, jobParameters);