validation-errors.md

Validation Errors in the pipeline

findNonUniqueTaskLib section

The check is looking for duplicate usage of azure-pipelines-task-lib.
The azure-pipelines-task-lib was designed as a singleton and there might be errors if the task uses different package versions.

If you have common npm packages as the task dependency, make sure the all dependencies have same version of azure-pipelines-task-lib in the task.
As a possible solution you also can remove these package versions through the make.json file, for example:

  {
    "rm": [
      {
        "items": [
          "node_modules/azure-pipelines-tasks-java-common/node_modules/azure-pipelines-task-lib",
        ],
        "options": "-Rf"
      }
    ]
  }

findIncompatibleAgentBase section

The checks will throws error if the agent-base package with version below 6.0.2 was found.
Usually this package comes with azure-pipelines-tasks-azure-arm-rest package.

The agent-base package below 6.0.2 does not work with node 10+ and the task will fail if the cx will try to use it with proxy.
To fix the check you need to upgrade it on 6.0.2 at least, for it, please, upgrade your common packages for a new version(if avaiable).
Another option is to install agent-base v6+ in the task and remove existing one using the make.json file using path from the error.

  {
    "rm": [
      {
        "items": [
          "node_modules/https-proxy-agent/node_modules/agent-base",
          "node_modules/azure-pipelines-tasks-azure-arm-rest/node_modules/agent-base"
        ],
        "options": "-Rf"
      }
    ]
  }