DevUI: HealthCheck Has Multiple Issues

by ADMIN 39 views

Introduction

DevUI is a powerful tool for building and managing applications, but like any complex system, it's not immune to issues. In this article, we'll explore a specific problem that has been encountered with the HealthCheck feature of DevUI, particularly when used with Kafka Streams. We'll delve into the details of the issue, discuss the expected behavior, and provide a step-by-step guide on how to reproduce the problem.

Describe the Bug

When using DevUI with Kafka Streams, several issues have been observed. The first issue is related to the display of text in the cells, which can cause the text to run off the screen. This is due to a lack of overflow handling, making it difficult to read and understand the information presented.

Image

The second issue is more critical, as it causes the Health Raw UI to fail with a 503 error. This is a significant problem, as it prevents users from accessing critical information about the application's health.

Image

The third issue is related to the display of the /q/health endpoint, which is not being shown correctly. This is a minor issue compared to the other two, but it's still a problem that needs to be addressed.

Image

Expected Behavior

The expected behavior of the HealthCheck feature is that it should work as intended, providing users with accurate and up-to-date information about the application's health. This includes displaying the correct text in the cells, handling overflow correctly, and providing access to critical information without errors.

Actual Behavior

Unfortunately, the actual behavior of the HealthCheck feature is far from the expected behavior. The text in the cells runs off the screen, the Health Raw UI fails with a 503 error, and the /q/health endpoint is not displayed correctly.

How to Reproduce

Reproducing the issue is relatively straightforward. To do so, follow these steps:

  1. Use Kafka Streams and create a topic that is missing.
  2. Access the Health Raw UI and observe the issues mentioned above.

Output of uname -a or ver

No response was provided for this section.

Output of java -version

The output of java -version is:

OpenJDK Runtime Environment Temurin-21.0.4+7 (build 21.0.4+7-LTS)

Quarkus version or git rev

The Quarkus version is 3.22.3.

Build tool (ie. output of mvnw --version or gradlew --version

The build tool used is Apache Maven 3.9.9 (8e8579a9e76f7d015ee5ec7bfcdc97d260186937).

Additional Information

No additional information was provided for this section.

Conclusion

In conclusion, the HealthCheck feature of DevUI has multiple issues when used with Kafka Streams. The text in the cells runs off the screen, the Health Raw UI fails with a 503 error, and the /q/health endpoint is not displayed correctly. To reproduce the issue, follow the steps outlined above. We hope that this article has provided valuable information to help resolve these issues and improve the overall user experience of DevUI.

Recommendations

Based on the issues encountered, we recommend the following:

  1. Implement overflow handling for the text in the cells to prevent it from running off the screen.
  2. Fix the 503 error in the Health Raw UI to ensure that users can access critical information without errors.
  3. Display the /q/health endpoint correctly to provide users with accurate and up-to-date information about the application's health.

Introduction

In our previous article, we explored the multiple issues encountered with the HealthCheck feature of DevUI, particularly when used with Kafka Streams. In this article, we'll provide a Q&A section to address some of the most frequently asked questions related to this issue.

Q: What are the main issues with the HealthCheck feature?

A: The main issues with the HealthCheck feature are:

  1. Text overflow: The text in the cells runs off the screen, making it difficult to read and understand the information presented.
  2. 503 error: The Health Raw UI fails with a 503 error, preventing users from accessing critical information about the application's health.
  3. Incorrect display of /q/health endpoint: The /q/health endpoint is not displayed correctly, providing users with inaccurate and outdated information about the application's health.

Q: How can I reproduce the issue?

A: To reproduce the issue, follow these steps:

  1. Use Kafka Streams and create a topic that is missing.
  2. Access the Health Raw UI and observe the issues mentioned above.

Q: What is the expected behavior of the HealthCheck feature?

A: The expected behavior of the HealthCheck feature is that it should work as intended, providing users with accurate and up-to-date information about the application's health. This includes displaying the correct text in the cells, handling overflow correctly, and providing access to critical information without errors.

Q: What are the system requirements for reproducing the issue?

A: The system requirements for reproducing the issue are:

  1. Kafka Streams: Use Kafka Streams and create a topic that is missing.
  2. DevUI: Use the DevUI with Kafka Streams.
  3. Java: Use Java 8 or later.
  4. Quarkus: Use Quarkus 3.22.3 or later.

Q: How can I fix the 503 error in the Health Raw UI?

A: To fix the 503 error in the Health Raw UI, you can try the following:

  1. Check the logs: Check the logs for any errors or warnings related to the Health Raw UI.
  2. Verify the configuration: Verify that the configuration of the Health Raw UI is correct.
  3. Restart the application: Restart the application to see if the issue is resolved.

Q: How can I display the /q/health endpoint correctly?

A: To display the /q/health endpoint correctly, you can try the following:

  1. Check the configuration: Check the configuration of the /q/health endpoint to ensure that it is correct.
  2. Verify the implementation: Verify that the implementation of the /q/health endpoint is correct.
  3. Restart the application: Restart the application to see if the issue is resolved.

Q: What are the next steps to resolve the issue?

A: The next steps to resolve the issue are:

  1. Implement overflow handling: Implement overflow handling for the text in the cells to prevent it from running off the screen.
  2. Fix the 503 error: Fix the 503 error in the Health Raw UI to ensure that users can access critical information without errors.
  3. Display the /q/health endpoint correctly: Display the /q/health endpoint correctly to provide users with accurate and up-to-date information about the application's health.

By following these steps, you can resolve the issues encountered with the HealthCheck feature of DevUI and provide a more reliable and efficient tool for building and managing applications.