Jenkinsfile snippet

@NonCPS
def getLastJobInfo(build) {
	def res = null
	try {
		if(build.previousBuild != null) {
			def resp = httpRequest(quiet: true, url: "http://SERVER/jenkins/job/SOMEJOB/job/Pipeline/${build.previousBuild.id}/wfapi/describe")
			res = readJSON(text: resp.content)
		}
	} catch(e) {
		res = null
	}
	return res
}

...

try {
  lastJob = getLastJobInfo(currentBuild.rawBuild)
  if(lastJob != null) {
      def s = lastJob.stages.find { st -> st.name.compareToIgnoreCase(stageName) == 0 && st.status != 'SUCCESS' }
    if(s != null) {
      // do something here!      
    }
  }
} catch(e) {
  // some error
}