NotSerializableException is thrown at the end of Jenkins stage

Question

I'm trying to write some groovy script for Jenkins to check if a build should be retested. This is the simplified version

@NonCPS
def checkNeedsRetest(String jobName)
{
    job = Jenkins.instance.getItem(jobName)
    stableNumber = job.lastStableBuild.number
    println "Last stable " + stableNumber
    lastNumber = job.lastBuild.number
    println "Last " + lastNumber
    if (stableNumber != lastNumber){
        return true
    }
}

If it is called directly it works as expected

println checkNeedsRetest('Job_Name')

@NonCPS
def checkNeedsRetest(String jobName)
{
    job = Jenkins.instance.getItem(jobName)
    stableNumber = job.lastStableBuild.number
    println "Last stable " + stableNumber
    lastNumber = job.lastBuild.number
    println "Last " + lastNumber
    if (stableNumber != lastNumber){
        return true
    }
}

This is the output

Running in Durability level: MAX_SURVIVABILITY
[Pipeline] Start of Pipeline
[Pipeline] echo
Last stable 508
[Pipeline] echo
Last 518
[Pipeline] echo
true
[Pipeline] End of Pipeline
[withMaven] WARNING abort infinite build trigger loop. Please consider opening a Jira issue: Infinite loop of job triggers 
Finished: SUCCESS

However when I try to run it from a stage it is executed as expected but end of stage throws a NotSerializableException.

running

stage('X'){
    println checkNeedsRetest('Job_Name')
}

@NonCPS
def checkNeedsRetest(String jobName)
{
    job = Jenkins.instance.getItem(jobName)
    stableNumber = job.lastStableBuild.number
    println "Last stable " + stableNumber
    lastNumber = job.lastBuild.number
    println "Last " + lastNumber
    if (stableNumber != lastNumber){
        return true
    }
}

produces this output

Running in Durability level: MAX_SURVIVABILITY
[Pipeline] Start of Pipeline
[Pipeline] stage
[Pipeline] { (X)
[Pipeline] echo
Last stable 508
[Pipeline] echo
Last 518
[Pipeline] echo
true
[Pipeline] }
[Pipeline] // stage
[Pipeline] End of Pipeline
an exception which occurred:
    in field groovy.lang.Closure.delegate
    in object org.jenkinsci.plugins.workflow.cps.CpsClosure2@6937fedf
    in field org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.closures
    in object org.jenkinsci.plugins.workflow.cps.CpsThreadGroup@718f9afa
    in object org.jenkinsci.plugins.workflow.cps.CpsThreadGroup@718f9afa
Caused: java.io.NotSerializableException: org.jenkinsci.plugins.workflow.job.WorkflowJob
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:926)
    at org.jboss.marshalling.river.BlockMarshaller.doWriteObject(BlockMarshaller.java:65)
    at org.jboss.marshalling.river.BlockMarshaller.writeObject(BlockMarshaller.java:56)
    at org.jboss.marshalling.MarshallerObjectOutputStream.writeObjectOverride(MarshallerObjectOutputStream.java:50)
    at org.jboss.marshalling.river.RiverObjectOutputStream.writeObjectOverride(RiverObjectOutputStream.java:179)
    at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:344)
    at java.util.LinkedHashMap.internalWriteEntries(LinkedHashMap.java:333)
    at java.util.HashMap.writeObject(HashMap.java:1363)
    at sun.reflect.GeneratedMethodAccessor96.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.jboss.marshalling.reflect.JDKSpecific$SerMethods.callWriteObject(JDKSpecific.java:156)
    at org.jboss.marshalling.reflect.SerializableClass.callWriteObject(SerializableClass.java:191)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:1028)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:1019)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:920)
    at org.jboss.marshalling.river.BlockMarshaller.doWriteObject(BlockMarshaller.java:65)
    at org.jboss.marshalling.river.BlockMarshaller.writeObject(BlockMarshaller.java:56)
    at org.jboss.marshalling.MarshallerObjectOutputStream.writeObjectOverride(MarshallerObjectOutputStream.java:50)
    at org.jboss.marshalling.river.RiverObjectOutputStream.writeObjectOverride(RiverObjectOutputStream.java:179)
    at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:344)
    at com.cloudbees.groovy.cps.SerializableScript.writeObject(SerializableScript.java:26)
    at sun.reflect.GeneratedMethodAccessor148.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.jboss.marshalling.reflect.JDKSpecific$SerMethods.callWriteObject(JDKSpecific.java:156)
    at org.jboss.marshalling.reflect.SerializableClass.callWriteObject(SerializableClass.java:191)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:1028)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:1019)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:1019)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:920)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1082)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:1040)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:1019)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:1019)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:920)
    at org.jboss.marshalling.river.BlockMarshaller.doWriteObject(BlockMarshaller.java:65)
    at org.jboss.marshalling.river.BlockMarshaller.writeObject(BlockMarshaller.java:56)
    at org.jboss.marshalling.MarshallerObjectOutputStream.writeObjectOverride(MarshallerObjectOutputStream.java:50)
    at org.jboss.marshalling.river.RiverObjectOutputStream.writeObjectOverride(RiverObjectOutputStream.java:179)
    at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:344)
    at java.util.HashMap.internalWriteEntries(HashMap.java:1793)
    at java.util.HashMap.writeObject(HashMap.java:1363)
    at sun.reflect.GeneratedMethodAccessor96.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.jboss.marshalling.reflect.JDKSpecific$SerMethods.callWriteObject(JDKSpecific.java:156)
    at org.jboss.marshalling.reflect.SerializableClass.callWriteObject(SerializableClass.java:191)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:1028)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:920)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1082)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:1040)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:920)
    at org.jboss.marshalling.AbstractObjectOutput.writeObject(AbstractObjectOutput.java:58)
    at org.jboss.marshalling.AbstractMarshaller.writeObject(AbstractMarshaller.java:111)
    at org.jenkinsci.plugins.workflow.support.pickles.serialization.RiverWriter.lambda$writeObject$0(RiverWriter.java:144)
    at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovySandbox.runInSandbox(GroovySandbox.java:237)
    at org.jenkinsci.plugins.workflow.support.pickles.serialization.RiverWriter.writeObject(RiverWriter.java:143)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.saveProgram(CpsThreadGroup.java:522)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.saveProgram(CpsThreadGroup.java:499)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.saveProgramIfPossible(CpsThreadGroup.java:486)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:410)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$200(CpsThreadGroup.java:93)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:282)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:270)
    at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:67)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:131)
    at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
    at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Finished: FAILURE

Answer 1

等待大神答复