[JENKINS-18588] Git polling builds same branch multiple times when 'Execute concurrent builds if necessary' turned on

We have a job setup to build pull request branches based on a naming convention on the branches. The branch specifier is /pr/. We have 'Execute concurrent builds if necessary' turned on for this job and sometimes Jenkins will kick off 4-5 builds for the same branch at the same time and fill up the executors. I've tried adding a quiet period but that didn't seem to help.

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Originally reported by jskjons, imported from: Git polling builds same branch multiple times when 'Execute concurrent builds if necessary' turned on

• status: Open
  
• priority: Major
  
• component(s): git-plugin
  
• label(s): git, plugin, robustness, scm, user-experience
  
• resolution: Unresolved
  
• votes: 10
  
• watchers: 18
  
• imported: 2025-12-02
  

We have a job setup to build pull request branches based on a naming convention on the branches. The branch specifier is /pr/. We have 'Execute concurrent builds if necessary' turned on for this job and sometimes Jenkins will kick off 4-5 builds for the same branch at the same time and fill up the executors. I've tried adding a quiet period but that didn't seem to help.

• environment: RHEL 6