[JENKINS-42616] Restarted Jobs consume Nodes when not necessary

May be related to 

1. JENKINS-40771

 

In the following situation, we have a single job that runs a function which requires a node.

Upon restart the job consumes 1 more mode than expected.

I expect only a single node to be used at any time.  Before restart this is the case, after restart this is not.

The additional node is consumed until the parallel call is finished.

If this additional node happens to be the only available node then the pending jobs will be stuck waiting for executor.

Pictures attached.

To reproduce:

1. Run the following pipeline script


2. Once its running restart server


3. Observe the build queue

This has been tested using the windows service and running from the cmdline using: "java -jar jenkins.war --httpPort=8082"

```
def run_function (String words){
return {
node (){
sleep(300)
println words
}
}
}
Map parllel_map
node () {
println "Using my frist node"
parllel_map = [
'A': run_function("A")
]
}
parallel parllel_map

```

---
Originally reported by matthall, imported from: Restarted Jobs consume Nodes when not necessary

• status: Open
  
• priority: Major
  
• component(s): workflow-cps-plugin
  
• resolution: Unresolved
  
• votes: 1
  
• watchers: 2
  
• imported: 2025-12-07
  

Raw content of original issue

May be related to 



	
JENKINS-40771



 


In the following situation, we have a single job that runs a function which requires a node.


Upon restart the job consumes 1 more mode than expected.


I expect only a single node to be used at any time.  Before restart this is the case, after restart this is not.


The additional node is consumed until the parallel call is finished.


If this additional node happens to be the only available node then the pending jobs will be stuck waiting for executor.


Pictures attached.


To reproduce:



	
Run the following pipeline script

	
Once its running restart server

	
Observe the build queue



This has been tested using the windows service and running from the cmdline using: "java -jar jenkins.war --httpPort=8082"



def run_function (String words){

  return {

    node (){

      sleep(300)

      println words

    }

  }

}

Map parllel_map

node () {

  println "Using my frist node"

  parllel_map = [

  'A': run_function("A")

  ]

}

parallel parllel_map

environment

```
Chrome

Jenkins ver. 2.19.4

Pipeline 2.5
```

3 attachments

- [42616.PNG](https://issues.jenkins.io/secure/attachment/36353/42616.PNG)
> 
- [after restart.png](https://issues.jenkins.io/secure/attachment/36352/after%20restart.png)
> 
- [before restart.png](https://issues.jenkins.io/secure/attachment/36351/before%20restart.png)
> 

No source file or test is named. Start by running the provided Pipeline script on Jenkins 2.19.4, restarting the server while it runs, and observing the build queue; then trace the workflow-cps-plugin restart behavior. Done means the restarted job uses only the expected node and pending jobs are not blocked by an unnecessary executor.

Written by the indexing model from the issue text.