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  1. Jenkins
  2. JENKINS-26137

Mysterious serialization errors

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      A flow which just had

      node('...') {sh 'echo hi'}

      waited for a node matching the label. I restarted Jenkins after changing something so that the label would be available. The shell step ran, but then the flow failed with

      ...
Running: Allocate node : End
Running: End of Workflow
java.io.NotSerializableException: org.jenkinsci.plugins.workflow.job.WorkflowJob
	at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:890)
	at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1062)
	at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:10S18)
	at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:884)
	at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:584)
	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.close(RiverWriter.java:145)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.saveProgram(CpsThreadGroup.java:341)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.saveProgram(CpsThreadGroup.java:323)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:297)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$000(CpsThreadGroup.java:71)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$3.call(CpsThreadGroup.java:183)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$3.call(CpsThreadGroup.java:181)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
	at org.jenkinsci.plugins.workflow.cps.CpsVmThread.run(CpsVmThread.java:21)
Caused by: an exception which occurred:
	in field task
	in object java.util.ArrayList@401ac88
Finished: FAILURE

      CpsStepContext.getThread then began complaining that

          no thread 2 among []

      as the DurableTaskStep$Execution.run kept on running.

      It is not apparent from this stack trace why something is trying to serialize the job.

      Observed also in PR 21; https://github.com/jenkinsci/workflow-plugin/commit/a594618516a22e9e8bcd016808ca487efee80fff fixed it. Turned out in that case that the culprit was ExecutorPickle. But why could the error message not say that? It only said field task, which was not enough information.

            jglick Jesse Glick
            jglick Jesse Glick
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              Created:
              Updated:
              Resolved: