The Spring Boot implementations does not set any TaskExecutor so it defaults to SyncTaskExecutor. And there is no way (as I know) to override the default jobLauncher bean because of this line in BasicBatchConfigurer which creates a default jobLauncher:

@PostConstruct public void initialize() { try { this.transactionManager = createTransactionManager(); this.jobRepository = createJobRepository(); this.jobLauncher = createJobLauncher(); this.jobExplorer = createJobExplorer(); } catch (Exception ex) { throw new IllegalStateException("Unable to initialize Spring Batch", ex); } } 

I also tried to autowire jobLauncher and set the TaskExecutor by myself. But because I can only autowire the interface, I can't call jobLauncher.setTaskExecutor(simpleAsyncTaskExecutor).