Question
Answer and Explanation
If JRebel is no longer recognizing that a build is in progress, several factors could be at play. Here's a breakdown of common causes and how to address them:
1. Incorrect JRebel Configuration:
- jrebel.xml: Ensure your `jrebel.xml` file is correctly configured and points to the correct directories for your project's classes and resources. Incorrect paths will prevent JRebel from detecting changes.
- IDE Integration: Verify that JRebel is properly integrated with your IDE (IntelliJ IDEA, Eclipse, etc.). Check the JRebel plugin settings to ensure it's enabled and configured for your project.
2. Build Process Issues:
- Build Output Directory: JRebel relies on the build output directory. If your build process is not placing compiled classes in the directory JRebel is monitoring, it won't detect changes. Double-check your IDE's build settings and ensure the output path matches the one in `jrebel.xml`.
- Clean Builds: Performing a "clean" build can sometimes cause JRebel to lose track of the build process. Try a regular build instead of a clean build to see if that resolves the issue.
3. JRebel Agent Problems:
- Agent Not Attached: Confirm that the JRebel agent is correctly attached to your application server or JVM. Check the server logs for JRebel startup messages. If the agent isn't attached, JRebel won't work.
- Agent Version: Ensure you are using a compatible version of the JRebel agent with your application server and Java version. Outdated or incompatible versions can cause issues.
4. Resource Loading Issues:
- Resource Paths: If JRebel is not detecting changes in resources (e.g., properties files, XML files), verify that the resource paths in `jrebel.xml` are correct. Also, ensure that the resources are being copied to the correct output directory during the build process.
5. IDE Caching:
- IDE Caches: Sometimes, IDE caches can interfere with JRebel. Try invalidating the IDE's caches and restarting the IDE to see if that helps.
6. Application Server Issues:
- Server Configuration: Ensure that your application server is configured to allow JRebel to reload classes and resources. Some servers may have specific settings that need to be adjusted.
7. JRebel License:
- License Status: Verify that your JRebel license is valid and active. An expired license can cause JRebel to stop working correctly.
Troubleshooting Steps:
- Check JRebel Logs: Examine the JRebel logs for any error messages or warnings. These logs can provide valuable clues about what's going wrong.
- Restart Everything: Try restarting your IDE, application server, and even your computer. Sometimes, a simple restart can resolve the issue.
- Simplify Configuration: If you have a complex setup, try simplifying it to isolate the problem. For example, try running a simple application with JRebel to see if it works correctly.
By systematically checking these areas, you should be able to identify why JRebel is no longer detecting build progress and get it working correctly again. If the problem persists, consult the JRebel documentation or contact their support for further assistance.