Explain Error Plugin

AI-powered Jenkins plugin that explains pipeline and job failures with human-readable insights.

🎥 Demo

👉 Watch the hands-on demo on YouTube — setup, run, and see how AI explains your Jenkins job failures.

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Overview

Tired of digging through long Jenkins logs to understand what went wrong?

Explain Error Plugin leverages AI to automatically interpret job and pipeline failures—saving you time and helping you fix issues faster.

Whether it’s a compilation error, test failure, or deployment hiccup, this plugin turns confusing logs into human-readable insights.

Key Features

• 🔍 One-click error analysis on any console output
• ⚙️ Pipeline-ready with a simple explainError() step
• 💡 AI-powered explanations via OpenAI GPT models, Google Gemini or local Ollama models
• 🤖 Smart provider management — LangChain4j handles most providers automatically
• 🎯 Customizable: set provider, model, API endpoint, log filters, and more

Quick Start

Prerequisites

• Jenkins 2.479.3+
• Java 17+
• AI API Key (OpenAI or Google)

Installation

1. Install via Jenkins Plugin Manager:

   • Go to Manage Jenkins → Manage Plugins → Available
   • Search for "Explain Error Plugin"
   • Click Install and restart Jenkins

2. Manual Installation:

   • Download the .hpi file from releases
   • Upload via Manage Jenkins → Manage Plugins → Advanced

Configuration

1. Go to Manage Jenkins → Configure System
2. Find the "Explain Error Plugin Configuration" section
3. Configure the following settings:

Setting	Description	Default
Enable AI Error Explanation	Toggle plugin functionality	✅ Enabled
AI Provider	Choose between OpenAI, Google Gemini, or Ollama	OpenAI
API Key	Your AI provider API key	Get from OpenAI or Google AI Studio
API URL	AI service endpoint	Automatically handled by LangChain4j for most providers, or specify a custom endpoint such as http://localhost:11434 for Ollama.
AI Model	Model to use for analysis	Required. Specify the model name offered by your selected AI provider

4. Click "Test Configuration" to verify your setup
5. Save the configuration

Configuration as Code (CasC)

This plugin supports Configuration as Code for automated setup. Use the explainError symbol in your YAML configuration:

OpenAI Configuration:

unclassified:
  explainError:
    enableExplanation: true
    provider: "OPENAI"
    apiKey: "${AI_API_KEY}"
    model: "gpt-5-nano"

Google Gemini Configuration:

unclassified:
  explainError:
    enableExplanation: true
    provider: "GEMINI"
    apiKey: "${AI_API_KEY}"
    model: "gemini-2.0-flash"

Ollama Configuration:

unclassified:
  explainError:
    enableExplanation: true
    provider: "OLLAMA"
    apiUrl: "http://localhost:11434"
    model: "gemma3:1b" # gpt-oss, deepseek-r1, etc

Environment Variable Example:

export AI_API_KEY="your-api-key-here"

This allows you to manage the plugin configuration alongside your other Jenkins settings in version control.

Supported AI Providers

OpenAI

• Models: gpt-5-nano, gpt-4, gpt-4-turbo
• API Key: Get from OpenAI Platform
• Endpoint: Automatically handled by LangChain4j
• Best for: Comprehensive error analysis with excellent reasoning

Google Gemini

• Models: gemini-2.0-flash, gemini-2.0-pro
• API Key: Get from Google AI Studio
• Endpoint: Automatically handled by LangChain4j
• Best for: Fast, efficient analysis with competitive quality

Ollama (Local/Private LLM)

• Models: gemma3:1b, gpt-oss, deepseek-r1, and any model available in your Ollama instance
• API Key: Not required by default (unless your Ollama server is secured)
• Endpoint: http://localhost:11434 (or your Ollama server URL)
• Best for: Private, local, or open-source LLMs; no external API usage or cost

Usage

Method 1: Pipeline Step

Use explainError() in your pipeline (e.g., in a post block):

pipeline {
    agent any
    stages {
        stage('Build') {
            steps {
                script {
                    // Your build steps here
                    sh 'make build'
                }
            }
        }
    }
    post {
        failure {
            // Automatically explain errors when build fails
            explainError()
        }
    }
}

Optional parameters:

explainError(
  maxLines: 500,
  logPattern: '(?i)(error|failed|exception)'
)

Output appears in the sidebar of the failed job.

Method 2: Manual Console Analysis

Works with Freestyle, Declarative, or any job type.

1. Go to the failed build’s console output
2. Click Explain Error button in the top
3. View results directly under the button

Troubleshooting

Issue	Solution
API key not set	Add your key in Jenkins global config
Auth or rate limit error	Check key validity, quota, and provider plan
Button not visible	Ensure Jenkins version ≥ 2.479.3, restart Jenkins after installation

Enable debug logs:

Manage Jenkins → System Log → Add logger for io.jenkins.plugins.explain_error

Best Practices

1. Use explainError() in post { failure { ... } } blocks
2. Apply logPattern to focus on relevant errors
3. Monitor your AI provider usage to control costs
4. Keep plugin updated regularly

Support & Community

• GitHub Issues for bug reports and feature requests
• Contributing Guide if you'd like to help
• Security concerns? Email [email protected]

License

Licensed under the MIT License.

Acknowledgments

Built with ❤️ for the Jenkins community. If you find it useful, please ⭐ us on GitHub!