Steps :

• A project A is configured to be built at 5am (In the Build triggers section, only 'Build automatically' is checked, with the cron string 0 5 * * *
• The build has an ivy.xml file which declare that it depends on another project B
• The projects B is configured to build the projects that depends on them :
  • 'Trigger the build of other projects based on the Ivy dependency management system' is checked'
  • a path to the ivy file of this project is provided
  • 'Trigger this build even if upstream build is unstable' is not checked
  • 'Use parameters set by upstream builds' is not checked
• The code of project A hardly ever changes; it's a pretty long build, and it locks resources, so we want to perform only once a day
• The code of project B changes a lot, so this project is built more often

Seen :

• Whenever the project 'B' is built, a build of the project 'A' is triggered

Is is a bug of the plugin ? Is there a way to configure project A so that the 'CRON' build is always respected ?
Is it a known problem of our relatively old version of Jenkins / Ivy plugin ?

Thanks
PH