Jenkins pipeline: java.io.NotSerializableException: java.util.HashMap$Node

Question

I have a very simple Jenkins pipline code - read properties from text and call httpRequest in a loop to post this set of properties to a server. However whenever httpRequest is called in the loop, jenkins throws up this exception, it is almost impossible to tell what the error is.

If I move the httpRequest outside of the loop, it works fine - but then not sure how to iterate and post all the properties.

props = readProperties text:"hello1=world1\nhello2=world2"

for (prop in props) {
    String name = prop.key
    String value = prop.value
    println "prop $name is $value"
    httpRequest  httpMode: 'POST', url: "http://myUrl", requestBody: "Name=$name&Value=$value",  contentType: 'APPLICATION_FORM'

}

The exception is:

an exception which occurred:
    in field com.cloudbees.groovy.cps.impl.BlockScopeEnv.locals
    in object com.cloudbees.groovy.cps.impl.LoopBlockScopeEnv@69ea9f29
    in field com.cloudbees.groovy.cps.impl.ProxyEnv.parent
    in object com.cloudbees.groovy.cps.impl.BlockScopeEnv@628b19b4
    in field com.cloudbees.groovy.cps.impl.ProxyEnv.parent
    in object com.cloudbees.groovy.cps.impl.BlockScopeEnv@31a17e1b
    in field com.cloudbees.groovy.cps.impl.CallEnv.caller
    in object com.cloudbees.groovy.cps.impl.FunctionCallEnv@1b791013
    in field com.cloudbees.groovy.cps.Continuable.e
    in object org.jenkinsci.plugins.workflow.cps.SandboxContinuable@4de530bb
    in field org.jenkinsci.plugins.workflow.cps.CpsThread.program
    in object org.jenkinsci.plugins.workflow.cps.CpsThread@7c155bf7
    in field org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.threads
    in object org.jenkinsci.plugins.workflow.cps.CpsThreadGroup@5269cced
    in object org.jenkinsci.plugins.workflow.cps.CpsThreadGroup@5269cced
Caused: java.io.NotSerializableException: java.util.HashMap$Node
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:860)
    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:1785)
    at java.util.HashMap.writeObject(HashMap.java:1362)
    at sun.reflect.GeneratedMethodAccessor113.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.SerializableClass.callWriteObject(SerializableClass.java:273)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:976)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1032)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:988)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:967)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1032)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:988)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:967)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1032)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:988)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:967)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1032)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:988)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:967)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1032)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:988)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:967)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1032)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:988)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
    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.TreeMap.writeObject(TreeMap.java:2438)
    at sun.reflect.GeneratedMethodAccessor132.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.SerializableClass.callWriteObject(SerializableClass.java:273)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:976)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1032)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:988)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
    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:108)
    at org.jenkinsci.plugins.workflow.support.pickles.serialization.RiverWriter.writeObject(RiverWriter.java:143)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.saveProgram(CpsThreadGroup.java:467)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.saveProgram(CpsThreadGroup.java:443)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.saveProgramIfPossible(CpsThreadGroup.java:430)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:367)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$200(CpsThreadGroup.java:82)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:243)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:231)
    at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:64)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:112)
    at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

stackoverflow.com/questions/31654497/…

qwerty
– qwerty

2019-01-14 07:55:58 +00:00
Commented Jan 14, 2019 at 7:55 — qwerty
– qwerty, Commented Jan 14, 2019 at 7:55

lvthillo · Accepted Answer · 2018-06-05 20:28:18Z

1

I installed this plugin and created the following pipeline (I couldn't test the request of course without more info but the iteration is showed).

pipeline {
    agent any 

    stages {
        stage('test'){
            steps {
                script {
                    def props = readProperties text:"hello1=world1\nhello2=world2"
                    for (prop in props) {
                        String name = prop.key
                        String value = prop.value
                        println "prop $name is $value"
                        //httpRequest  httpMode: 'POST', url: "http://myUrl", requestBody: "Name=$name&Value=$value",  contentType: 'APPLICATION_FORM'
                    }
                }
            }
        }
    }  
}

answered Jun 5, 2018 at 20:28

lvthillo

31.3k16 gold badges102 silver badges138 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

justanothercoder Over a year ago

Thanks - yes the loop goes fine by itself. The error seems to be in calling httpRequest within the loop. Outside the loop, httpRequest works fine.

Manish Joshi Over a year ago

@justanothercoder did you find a solution for this? In my case even the sh script execution is not working inside the loop, so I wanted to check if you found any solution to this.

Lin Du · Accepted Answer · 2019-11-12 13:50:26Z

1

You are getting the exception not serializable exception because Jenkins will from time to time save the current state on the pipeline to disk making the assumption that every object in env is serializable.

Unfortunately, HashMap$Node is not serializable so you will have to do something else. And I suggest

def props = readProperties text:"hello1=world1\nhello2=world2"

for(def key : props.keySet()){
     def value = props.get(key)
     println "prop $key is $value"
}

edited Nov 12, 2019 at 13:50

Lin Du

104k138 gold badges340 silver badges575 bronze badges

answered Nov 12, 2019 at 13:31

user12361280

111 bronze badge

Collectives™ on Stack Overflow

Jenkins pipeline: java.io.NotSerializableException: java.util.HashMap$Node

2 Answers 2

2 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related