Скачать или смотреть Resolving Jenkins Git Publish Failures When Pushing Branches

Discover how to troubleshoot and resolve the issues related to Jenkins Git Publish failing when pushing branches, especially in Azure DevOps.
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Troubleshooting Jenkins Git Publish Failures When Pushing Branches

When working with continuous integration (CI) pipelines in Jenkins, you might encounter unexpected challenges. One of these could be the failure of Jenkins Git Publish when attempting to push a newly created branch to your Git repository, often resulting in cryptic error messages and no standard error logs to guide your debugging process. This guide will walk you through the situation, explain why it might occur, and provide steps to resolve the issue.

Understanding the Issue

In our scenario, the Jenkins build includes a local shell command designed to create a local Git branch based on the build parameters. After preparing the files, the goal is to push this new branch to a remote repository, such as Azure DevOps, ensuring that future updates to that branch can be pulled as needed.

However, the following command issued for the push results in failure:

[[See Video to Reveal this Text or Code Snippet]]

The detailed error message reveals:

ERROR: Failed to push the branch with exit code 128.

stdout and stderr: Both are empty, making it difficult to diagnose the problem.

Here are some elements to analyze and troubleshoot:

User Credentials: Although Jenkins uses GIT_ASKPASS to set credentials, it's important to verify that the correct permissions and scopes are in place for the token or username being used.

Network Connectivity: Since the server lacks a public IP and uses a company's network, interruptions or restrictions might arise. However, the ability to clone the repository suggests that connectivity isn't the immediate issue.

Why the Issue Occurs

After delving deeper, it turned out that the issue stemmed from a configuration error in Jenkins. Specifically, early values being passed or concatenated into the branch name resulted in a Git branch (UAT-sprint-20-96) that did not exist. Here’s how to fix it:

Steps to Resolve

Verify Jenkins Configuration:

Check the Jenkins job configuration to ensure that the branch name is specified correctly without concatenation or extraneous characters.

Inspect the Shell Command:

View the shell script executed during the build step. Make sure the variable used for branch creation is correct and not influenced by any earlier values.

Direct Command Testing:

Run the same push command directly in the server's CLI to rule out command validity. If it succeeds in the CLI, the problem lies in the Jenkins configuration.

Credentials Management:

Ensure appropriate Git credentials are configured in Jenkins. Review the credentials in Jenkins to confirm they are recent and possess the required scope for repository access.

Network Policies:

If issues persist, consult your networking team to verify that there are no firewalls or other security policies preventing push actions to Azure DevOps.

Logging:

Increase logging verbosity for Jenkins and Git actions to capture more detailed output when the error occurs. This can assist in further troubleshooting if needed.

Conclusion

Encountering failures when trying to push branches via Jenkins Git Publish can be challenging, especially with cryptic error outputs. However, by methodically checking configurations and credentials, addressing network concerns, and conducting thorough testing, you can resolve these issues effectively.

If you have faced similar challenges or resolved any unique issues, feel free to share your experiences in the comments below!