[JENKINS-23518] GitHub webhooks and concurrent builds don't work because git plugin won't poll concurrently

Simple Jenkins configuration, 1 master, no slaves. My project has 1 build trigger: "Build when a change is pushed to GitHub". I also have "Execute concurrent builds if necessary" enabled.

If a new trigger occurrs as a result from a push to GitHub, the concurrent workspace is not created. Jenkins waits until the current request is complete, then starts. If there were 2 queued up, it only executes the 'latest' one.

If I use a custom workspace, the concurrent builds DO work. Unfortunately, I cannot use this option as each of the workspaces need to be unique.

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Originally reported by cfunston, imported from: GitHub webhooks and concurrent builds don't work because git plugin won't poll concurrently

• status: Open
  
• priority: Major
  
• component(s): git-plugin
  
• resolution: Unresolved
  
• votes: 1
  
• watchers: 2
  
• imported: 2025-12-02
  

Raw content of original issue

Simple Jenkins configuration, 1 master, no slaves. My project has 1 build trigger: "Build when a change is pushed to GitHub". I also have "Execute concurrent builds if necessary" enabled.


If a new trigger occurrs as a result from a push to GitHub, the concurrent workspace is not created. Jenkins waits until the current request is complete, then starts. If there were 2 queued up, it only executes the 'latest' one.


If I use a custom workspace, the concurrent builds DO work. Unfortunately, I cannot use this option as each of the workspaces need to be unique.

environment

```
Ubuntu 12.04.4

Jenkins Version 1.554.1
```