Jenkins Active Choices Parameter groovy script fails to read filesystem

The following groovy script works in the jenkins script console on the controller. However, it fails if I change the path to /path/to/workspace/prod_file.json and run the script on an agent node.

prod_file.json is pulled from github, otherwise they're the same. prod_file.json gets its trailing newline stripped, but even when that char is restored, the script fails. The permissions are the least restrictive (777). I even tried reading the file in python, and dumping it back to the fs as a new json file. I tried reading the file from /tmp, $HOME, $WORKSPACE, $WORKSPACE/other_project, etc.

I also tried the dot delimited path in add, e.g., add(it.jenkins_name)

The plugin provides no feedback, so I'm not sure where else to turn.

Is this a configuration issue, i.e., permissions, a file format issue, a bug in the plugin?

import groovy.json.JsonSlurper

def list = []
File textfile = new File('/tmp/test.json') 
JsonSlurper slurper = new JsonSlurper()
def parsedJson = slurper.parse(textfile)
parsedJson.each{ list.add(it['jenkins_name']) }
return list


  • Active Choices groovy script always runs on the controller node. Simple test:

    def host = 'hostname'.execute().text
    return [host]