On Thu, Dec 28, 2017 at 6:17 AM, Ramanathan Muthaiah
<rus.cah...@gmail.com> wrote:
> Hello All,
>
> I have tested the below snippet of code in myjenkinsurl/script and it works
> fine.
>
> However, same code (embedded or loaded via external Groovy code) in Pipeline
> workflow script fails, inspite of CPS annotation (with the stacktrace that's
> given after this code snippet) ?
>
> NOTE:
> First print statement in 'getjobName' function successfully matches the job
> (using regex).
>
> #!/usr/bin/env groovy
>
> import org.jenkinsci.plugins.workflow.job.*
>
> @NonCPS
> def getjobName(String job) {
> for (item in Jenkins.instance.items) {
> if (item =~ /metamon-alert-configs/ ) {
> println item.getName()
> jobname = item
> }
> }
>
> for (build in jobname.Builds()) {
> println build
> }
> }
>
>
> node('master') {
> stage('getlog') {
> def jobname = getjobName("mon-alert-configs")
> }
> }
>
>
> Reading (novice at it) the stacktrace suggests it's to do with serialization
> of variables but the annotation should take care of that, isn't it ?
>
> an exception which occurred:
> in field groovy.lang.Closure.delegate
> in object org.jenkinsci.plugins.workflow.cps.CpsClosure2@72ae419a
> in field org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.closures
> in object org.jenkinsci.plugins.workflow.cps.CpsThreadGroup@401a5d46
> in object org.jenkinsci.plugins.workflow.cps.CpsThreadGroup@401a5d46
> Caused: java.io.NotSerializableException:
> org.jenkinsci.plugins.workflow.job.WorkflowJob
> 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.LinkedHashMap.internalWriteEntries(LinkedHashMap.java:333)
> . . . . .
> . . . . .
No, the annotation wouldn't help with this, I believe.
The problem is, when "job steps" execute, objects are deserialized
before and after. If Jenkins has to try to serialize something in
scope that is not serializable, you will get that exception. What is
often very frustrating is that the stacktrace won't tell you which
variable contains something that is not serializable. What it will
usually tell you is what type was not serializable. If you're lucky,
it will be obvious what variable has a value of that type. In your
case, I believe is it obvious.
The other thing that is not obvious is that "println" is a job step.
If you really need to do a println, then right before you call it, you
have to assign "null" to variables containing values of
non-serializable types.
In your "getjobName" method, it's odd that your formal parameter is
called "job", when it's really "jobName", and then you appear to
assign to "jobname", which isn't defined anywhere, but the value
actually represents a "Job", not a "jobname".
>
>
> /Ram
>
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