[JENKINS-55861] Parallel stage labels displayed on top of each other

I noticed today that some of our build logs have written the stage label on top of each other when there was a parallel build step used. It doesn't look like it happens all the time, but does seem to happen when both stages write out at the same time.

The Jenkinsfile is essentially

pipeline

{

    agent any


    stages

    {

stage ('Parallel')

{

    steps

    {

parallel(

    first:  

    {

sh "run_first_test_that_outputs" // In our case PHPUnit       

    }

    second:

    {

sh "run_second_test_that_outputs" // In our case, session based tests 

    }

)

    }

}

    }

}

---
Originally reported by drugcrazed, imported from: Parallel stage labels displayed on top of each other

• status: Open
  
• priority: Trivial
  
• component(s): workflow-basic-steps-plugin
  
• resolution: Unresolved
  
• votes: 0
  
• watchers: 1
  
• imported: 20251215-220547
  

Raw content of original issue

I noticed today that some of our build logs have written the stage label on top of each other when there was a parallel build step used. It doesn't look like it happens all the time, but does seem to happen when both stages write out at the same time.


The Jenkinsfile is essentially




pipeline

{

    agent any


    stages

    {

        stage ('Parallel')

        {

            steps

            {

                parallel(

                    first:  

                    {

                        sh "run_first_test_that_outputs" // In our case PHPUnit                                               

                    }

                    second:

                    {

                        sh "run_second_test_that_outputs" // In our case, session based tests                                 

                    }

                )

            }

        }

    }

}

1 attachment

- [jenkins-parallel.png](https://issues.jenkins.io/secure/attachment/45837/jenkins-parallel.png)
> 

Reproduce el problema con el Jenkinsfile mostrado en el issue, utilizando dos pasos paralelos que emitan salida al mismo tiempo. Empieza inspeccionando cómo workflow-basic-steps-plugin gestiona las etapas paralelas y las etiquetas. Se considera terminado cuando la salida paralela concurrente ya no muestra las etiquetas de las etapas unas sobre otras.

Escrito por el modelo de indexación a partir del texto del issue.