Spring Batch: Unsatisfied Dependency Exception when creating a job
### Understanding the Problem An Unsatisfied Dependency Exception occurs when Spring cannot create a bean due to missing dependencies. In the context of Spring Batch, this often happens when trying to create a job or step. These exceptions can be frustrating to debug, especially when they occur unexpectedly after changes to the configuration or code. ### Key Points to Consider 1. Spring Batch uses dependency injection heavily, relying on properly configured beans. 2. Common causes include missing or incorrectly configured beans, circular dependencies, and version mismatches. 3. Proper logging and error messages can help identify the root cause quickly. 4. Understanding Spring Batch's component model and lifecycle is crucial for troubleshooting. ### Step-by-Step Thought Process 1. Identify the exact exception message and stack trace. 2. Check the configuration classes for missing or incorrect bean definitions. 3. Verify that all required beans are properly annotated and configured.