how to avoid cps error using XmlSlurper() method in jenkins pipeline

[Jesus Fernandez-2]

I am using a simple test pipeline to get a username out of a xml file, I have written a simple function using the XmlSlurper method and I have included the @NonCPS annotation at the beginning of the function but I keep getting an error, even though the function seems to work as it prints out in the console the username I am trying to find but it finishes the build with failure status. This is the pipeline:

```

import groovy.xml.*

import jenkins.model.Jenkins

@NonCPS

def findComitter(){

committer = ""

found = false

file = new XmlSlurper().parse("C:/Users/User/.jenkins/jobs/Phoenix_pipeline/builds/288/changelog6429015253614530280.xml")

file.entry.each { entry ->

entry.changenumber.each { changenumber ->

changenumber.children().each { tag ->

if(tag.name() == "changeUser" && found != true){

committer = tag.text()

found = true

}

}

}

}

println committer

//return committer.toString()

}

pipeline {

agent any

stages {

stage('test') {

steps {

findComitter()

}

}

}

}

```

this is the output I get, as you can see the function call seems to work as it get to the ```println commiter``` step but then I get an error and failure build status:

```

00:00:00.021 [Pipeline] Start of Pipeline

00:00:00.121 [Pipeline] node

00:00:00.129 Running on Jenkins in C:\Users\User\.jenkins\workspace\test

00:00:00.140 [Pipeline] {

00:00:00.157 [Pipeline] stage

00:00:00.161 [Pipeline] { (Hello)

00:00:00.180 [Pipeline] echo

00:00:00.182 Hello World

00:00:00.202 [Pipeline] echo

00:00:00.204 jaydenm

00:00:00.207 [Pipeline] }

00:00:00.220 [Pipeline] // stage

00:00:00.230 [Pipeline] }

00:00:00.242 [Pipeline] // node

00:00:00.264 [Pipeline] End of Pipeline

00:00:00.293 an exception which occurred:

00:00:00.293 in field org.jenkinsci.plugins.pipeline.modeldefinition.withscript.WithScriptScript.script

00:00:00.293 in object org.jenkinsci.plugins.pipeline.modeldefinition.agent.impl.LabelScript@49af372

00:00:00.293 in field groovy.lang.Closure.delegate

00:00:00.293 in object org.jenkinsci.plugins.workflow.cps.CpsClosure2@18d98e8e

00:00:00.293 in field groovy.lang.Closure.delegate

00:00:00.293 in object org.jenkinsci.plugins.workflow.cps.CpsClosure2@43324839

00:00:00.293 in field org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.closures

00:00:00.293 in object org.jenkinsci.plugins.workflow.cps.CpsThreadGroup@76d386ff

00:00:00.293 in object org.jenkinsci.plugins.workflow.cps.CpsThreadGroup@76d386ff

00:00:00.293 Caused: java.io.NotSerializableException: groovy.util.slurpersupport.NodeChild

```

I have been looking through the SO threads and all the info I got is to use the @NonCPS annotation to use any non-serializable objects, which I have done.

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[Reinhold Füreder]

Hi jfernandez,

 

Naïve guess(es):

• Are you maybe missing this:

import com.cloudbees.groovy.cps.NonCPS

• though not sure if the annotation would/should not then lead to an error instead already?
• Or is this a declarative pipeline and you are missing the script { … } step based wrapping of calling your findCommitter() method (assuming that calling it when being declared in the declarative pipeline is even allowed like this)?

steps {

  script {

    findComitter()

  }

}

 

HTH Reinhold

 

 

From: [hidden email] <[hidden email]> On Behalf Of [hidden email]
Sent: Mittwoch, 13. Jänner 2021 10:22
To: Jenkins Users <[hidden email]>
Subject: how to avoid cps error using XmlSlurper() method in jenkins pipeline

 

I am using a simple test pipeline to get a username out of a xml file, I have written a simple function using the XmlSlurper method and I have included the @NonCPS annotation at the beginning of the function but I keep getting an error, even though the function seems to work as it prints out in the console the username I am trying to find but it finishes the build with failure status. This is the pipeline:

```

import groovy.xml.*

import jenkins.model.Jenkins

 

 

@NonCPS

def findComitter(){

committer = ""

found = false

file = new XmlSlurper().parse("C:/Users/User/.jenkins/jobs/Phoenix_pipeline/builds/288/changelog6429015253614530280.xml")

file.entry.each { entry ->

entry.changenumber.each { changenumber ->

changenumber.children().each { tag ->

if(tag.name() == "changeUser" && found != true){

committer = tag.text()

found = true

}

}

}

}

println committer

//return committer.toString()

}

 

pipeline {

agent any

 

stages {

stage('test') {

steps {

findComitter()

}

}

}

}

 

```

 

this is the output I get, as you can see the function call seems to work as it get to the ```println commiter``` step but then I get an error and failure build status:

```

00:00:00.021 [Pipeline] Start of Pipeline

00:00:00.121 [Pipeline] node

00:00:00.129 Running on Jenkins in C:\Users\User\.jenkins\workspace\test

00:00:00.140 [Pipeline] {

00:00:00.157 [Pipeline] stage

00:00:00.161 [Pipeline] { (Hello)

00:00:00.180 [Pipeline] echo

00:00:00.182 Hello World

00:00:00.202 [Pipeline] echo

00:00:00.204 jaydenm

00:00:00.207 [Pipeline] }

00:00:00.220 [Pipeline] // stage

00:00:00.230 [Pipeline] }

00:00:00.242 [Pipeline] // node

00:00:00.264 [Pipeline] End of Pipeline

00:00:00.293 an exception which occurred:

00:00:00.293 in field org.jenkinsci.plugins.pipeline.modeldefinition.withscript.WithScriptScript.script

00:00:00.293 in object [hidden email]

00:00:00.293 in field groovy.lang.Closure.delegate

00:00:00.293 in object [hidden email]

00:00:00.293 in field groovy.lang.Closure.delegate

00:00:00.293 in object [hidden email]

00:00:00.293 in field org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.closures

00:00:00.293 in object [hidden email]

00:00:00.293 in object [hidden email]

00:00:00.293 Caused: java.io.NotSerializableException: groovy.util.slurpersupport.NodeChild

```

 

I have been looking through the SO threads and all the info I got is to use the @NonCPS annotation to use any non-serializable objects, which I have done.

--
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To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/3764c601-8250-44f8-875a-ea0ec35321aan%40googlegroups.com.

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[Jesus Fernandez-2]

Thanks for the answer. I found the issue which it was I was creating global objects within the findcommitter declaration, adding def before all the variables sorted the problelm

On Wednesday, January 13, 2021 at 12:19:40 PM UTC+1 r.fuereder wrote:

Hi jfernandez,

 

Naïve guess(es):

• Are you maybe missing this:

import com.cloudbees.groovy.cps.NonCPS

• though not sure if the annotation would/should not then lead to an error instead already?
• Or is this a declarative pipeline and you are missing the script { … } step based wrapping of calling your findCommitter() method (assuming that calling it when being declared in the declarative pipeline is even allowed like this)?

steps {

  script {

    findComitter()

  }

}

 

HTH Reinhold

 

 

From: [hidden email] <[hidden email]> On Behalf Of [hidden email]
Sent: Mittwoch, 13. Jänner 2021 10:22
To: Jenkins Users <[hidden email]>
Subject: how to avoid cps error using XmlSlurper() method in jenkins pipeline

 

I am using a simple test pipeline to get a username out of a xml file, I have written a simple function using the XmlSlurper method and I have included the @NonCPS annotation at the beginning of the function but I keep getting an error, even though the function seems to work as it prints out in the console the username I am trying to find but it finishes the build with failure status. This is the pipeline:

```

import groovy.xml.*

import jenkins.model.Jenkins

 

 

@NonCPS

def findComitter(){

committer = ""

found = false

file = new XmlSlurper().parse("C:/Users/User/.jenkins/jobs/Phoenix_pipeline/builds/288/changelog6429015253614530280.xml")

file.entry.each { entry ->

entry.changenumber.each { changenumber ->

changenumber.children().each { tag ->

if(tag.name() == "changeUser" && found != true){

committer = tag.text()

found = true

}

}

}

}

println committer

//return committer.toString()

}

 

pipeline {

agent any

 

stages {

stage('test') {

steps {

findComitter()

}

}

}

}

 

```

 

this is the output I get, as you can see the function call seems to work as it get to the ```println commiter``` step but then I get an error and failure build status:

```

00:00:00.021 [Pipeline] Start of Pipeline

00:00:00.121 [Pipeline] node

00:00:00.129 Running on Jenkins in C:\Users\User\.jenkins\workspace\test

00:00:00.140 [Pipeline] {

00:00:00.157 [Pipeline] stage

00:00:00.161 [Pipeline] { (Hello)

00:00:00.180 [Pipeline] echo

00:00:00.182 Hello World

00:00:00.202 [Pipeline] echo

00:00:00.204 jaydenm

00:00:00.207 [Pipeline] }

00:00:00.220 [Pipeline] // stage

00:00:00.230 [Pipeline] }

00:00:00.242 [Pipeline] // node

00:00:00.264 [Pipeline] End of Pipeline

00:00:00.293 an exception which occurred:

00:00:00.293 in field org.jenkinsci.plugins.pipeline.modeldefinition.withscript.WithScriptScript.script

00:00:00.293 in object org.jenkinsci.plugins.pipeline.modeldefinition.agent.impl.LabelScript@49af372

00:00:00.293 in field groovy.lang.Closure.delegate

00:00:00.293 in object org.jenkinsci.plugins.workflow.cps.CpsClosure2@18d98e8e

00:00:00.293 in field groovy.lang.Closure.delegate

00:00:00.293 in object org.jenkinsci.plugins.workflow.cps.CpsClosure2@43324839

00:00:00.293 in field org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.closures

00:00:00.293 in object org.jenkinsci.plugins.workflow.cps.CpsThreadGroup@76d386ff

00:00:00.293 in object org.jenkinsci.plugins.workflow.cps.CpsThreadGroup@76d386ff

00:00:00.293 Caused: java.io.NotSerializableException: groovy.util.slurpersupport.NodeChild

```

 

I have been looking through the SO threads and all the info I got is to use the @NonCPS annotation to use any non-serializable objects, which I have done.

--
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To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/3764c601-8250-44f8-875a-ea0ec35321aan%40googlegroups.com.

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