ERROR: Found multiple extensions which provide method branchDiscoveryTrait with arguments []: [[com.cloudbees.jenkins.plugins.bitbucket.BranchDiscoveryTrait, jenkins.plugins.git.traits.BranchDiscoveryTrait, org.jenkinsci.plugins.github_branch_source.

[Eugène Ngontang]

Hi,

I'm using jenkins jobDSL plugin to generate my pipeline jobs from a groovy script, where I'm trying to create a multibranchPipelineJob as you can in the following line

     17 multibranchPipelineJob("projects/${project_name}/${component_name}") {

     18   branchSources {

     19     branchSource {

     20       source {

     21         git {

     22           remote(component.repository)

     23           credentialsId(component.credentials)

     24           traits {

     25             branchDiscoveryTrait()

     26             cleanBeforeCheckoutTrait()

     27           }

     28         }

     29       }

     30       strategy {

     31         defaultBranchPropertyStrategy {

     32           props {

     33           }

     34         }

     35       }

     36     }

     37   }

     38   triggers {

     39     periodic(5)

     40   }

     41   orphanedItemStrategy {

     42     discardOldItems {

     43       // numToKeep(20)

     44     }

     45   }

     46   if (component.jenkinsfile) {

     47     factory {

     48       workflowBranchProjectFactory {

     49         scriptPath(component.jenkinsfile)

     50       }

     51     }

     52   }

     53 }

When the main pipeline job executing this code runs, it raises this (apparently know) error :

> ERROR: Found multiple extensions which provide method

> branchDiscoveryTrait with arguments []:

> [[com.cloudbees.jenkins.plugins.bitbucket.BranchDiscoveryTrait,

> jenkins.plugins.git.traits.BranchDiscoveryTrait,

> org.jenkinsci.plugins.github_branch_source.BranchDiscoveryTrait]]

I've searched and see many results where people say that we should add `@Symbol` annotations to the `traits` implementations or to the relevant descriptors.

But I don't understand exactly what to do and where to place that @Symbol, people seem to say it solves the issue, but there is nowhere a good explanation and guidance to apply the fix.

Please what should I do where should the modification be done in the plugin code or elsewhere?

Best regards,

Eugène NG

  

[Eugène Ngontang]

Hi,

I solved it by using the specific `git` scm class, and the correct syntax was :

     17 multibranchPipelineJob("projects/${project_name}/${component_name}") {

     18   branchSources {

     19     branchSource {

     20       source {

     21         git {

     22           remote(component.repository)

     23           credentialsId(component.credentials)

     24           traits {

     25             gitBranchDiscovery()

     26             cleanBeforeCheckoutTrait {

     27               extension {

     28                 deleteUntrackedNestedRepositories(false)

     29               }

     30             }

     31           }

     32         }

     33       }

     34       strategy {

     35         defaultBranchPropertyStrategy {

     36           props {

     37           }

     38         }

     39       }

     40     }

     41   }

     42   triggers {

     43     periodic(5)

     44   }

     45   orphanedItemStrategy {

     46     discardOldItems {

     47       // numToKeep(20)

     48     }

     49   }

     50   if (component.jenkinsfile) {

     51     factory {

     52       workflowBranchProjectFactory {

     53         scriptPath(component.jenkinsfile)

     54       }

     55     }

     56   }

     57 }

Regards,

Eugène NG