Jenkins pipeline plugin how to run parallel tasks

Question

I am a beginner in jenkins, I want to launch few tasks in parallel on available slave nodes of jenkins using pipeline plugin.

I installed pipeline plugin and added below in the pipeline inline script section.

grovvy script : 
    parallel firstBranch: {
        node('master'){
            echo 'firstBranch'
        }
    }, 
    secondBranch: {
        node('slave1'){
            echo 'secondBranch'
        }
    }

NOTE: master and slave1 are my nodes

What are firstBranch and secondBranch ideally ????

Console output:

Started by user anonymous [Pipeline] parallel [Pipeline] [firstBranch] { (Branch: firstBranch) [Pipeline] [secondBranch] { (Branch: secondBranch) [Pipeline] [firstBranch] node [firstBranch] Running on master in /scratch/gnithyan/.hudson/workspace/pipeline_test
[Pipeline] [secondBranch] node
[Pipeline] [secondBranch] // node
[Pipeline] [secondBranch] }
[secondBranch] Failed in branch secondBranch
[Pipeline] [firstBranch] {
[Pipeline] [firstBranch] echo
[firstBranch] firstBranch
[Pipeline] [firstBranch] }
[Pipeline] [firstBranch] // node
[Pipeline] [firstBranch] }
[Pipeline] // parallel
[Pipeline] End of Pipeline

java.lang.IllegalStateException: cannot start writing logs to a finished node org.jenkinsci.plugins.workflow.cps.nodes.StepStartNode[id=8] at org.jenkinsci.plugins.workflow.support.actions.LogActionImpl.(LogActionImpl.java:110) at org.jenkinsci.plugins.workflow.support.actions.LogActionImpl.stream(LogActionImpl.java:81) at org.jenkinsci.plugins.workflow.support.DefaultStepContext.get(DefaultStepContext.java:73) at org.jenkinsci.plugins.workflow.steps.StepDescriptor.checkContextAvailability(StepDescriptor.java:252) at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:179) at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:126) at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:108) at groovy.lang.GroovyObject$invokeMethod$0.call(Unknown Source) at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)

I just starting getting this on a previously working pipeline script w/ the latest version of Jenkins as well. Haven't figured out what the stack dump means yet :-( — kenyee
In the below grovvy script 1.what does firstBranch and secondBranch signifies??? 2.does master and slave1 should be always the name if the available nodes on jenkins?? grovvy script : parallel firstBranch: { node('master'){ echo 'firstBranch' } }, secondBranch: { node('slave1'){ echo 'secondBranch' } } — Goutham Nithyananda

sabf sabf · Accepted Answer · 2016-10-21T07:24:59

I have the same problem. Perhaps I found the depending plugin: https://wiki.jenkins-ci.org/display/JENKINS/Pipeline+Supporting+APIs+Plugin See Release Note for Version 2.10 Regression in log handling with certain steps inside parallel in 2.9.

Yes updating the PlugIn works!

Jenkins pipeline plugin how to run parallel tasks

3 Answers