Fix Build Stuck in Jenkins: CI/CD Queue Solution (2026)
How to Fix “Build Stuck” in Jenkins (2026 Guide) The Short Answer To fix a stuck build in Jenkins, advanced users can try reallocating agents by toggling the “Use available agents” option in the Jenkins settings, which can reduce build queue times from 30 minutes to under 5 minutes. Additionally, checking the Jenkins logs for errors and adjusting the agent allocation strategy can help resolve the issue. Why This Error Happens Reason 1: The most common cause of a stuck build in Jenkins is insufficient agent allocation, where the number of available agents is not enough to handle the build queue, resulting in builds waiting indefinitely for an available agent. Reason 2: An edge case cause of stuck builds is a misconfigured Jenkins plugin, such as the “Heavy Job” plugin, which can cause builds to hang and occupy agents unnecessarily, leading to a backlog of builds in the CI/CD queue. Impact: The impact of a stuck build is a significant delay in the CI/CD pipeline, with build queue times increasing from 15 minutes to over an hour, affecting the overall development and deployment process. Step-by-Step Solutions Method 1: The Quick Fix Go to Jenkins > Manage Jenkins > Configure System Toggle Use available agents to Off, which will allow Jenkins to allocate agents more efficiently and reduce build queue times. Refresh the page to apply the changes and restart the build process. Method 2: The Command Line/Advanced Fix To adjust the agent allocation strategy, you can use the Jenkins CLI command: ...