Issue
On my team, we have a project that we want to do continuous-integration-style testing on. Our build takes around 2 hours and is triggered by the "Poll SCM" trigger (using Perforce as the server), and we have two build nodes.
Currently, if someone checks in a change, one build node will start up pretty much right away, but if another change gets checked in, the other node will not kick in, as it's waiting for the previous job to finish. However, I could like the other build node to start a build with the newer checkin as soon as possible, so that we can maximize the amount of continuous testing that's occurring (so that if e.g. one build fails we know sooner rather than later).
Is there any simple way to configure a Jenkins job (using Poll SCM against a Perforce server) to not block while another instance of the job is already running?
Unfortunately, due to the nature of the project it's not possible to simply break the project up into multiple build jobs that get pipelined across multiple slaves (as much as I'd like to change it to work in this way).
Solution
Use the "Execute concurrent builds if necessary" option in Jenkins configuration.
Answered By - tkosinski
