Matrix projects are consuming one extra executor

Issue

Matrix projects are consuming one extra executor

Environment

  • CloudBees Jenkins Enterprise
  • Matrix project plugin

Resolution

Matrix projects execute the axis using Flyweight executors so Jenkins doesn’t use a normal executor, also referred to as Heavyweight executor for this. Notice, that one of the apparent executors doesn’t have any number assigned. so it is not consuming any executor.

For a more detailed explanation about the differences between Flyweight and Heavyweight executors, please check Pipeline - Difference between Flyweight and Heavyweight Executors

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