[JENKINS-47971] Leaking Handles to \Device\NamedPipe on slave (Win7, JNLP)

Steps to reproduce:

(1) Create a simple, self calling pipeline script 'HelloWorldLoop' and start it:

stage('Foo') { 

    node('test-node') { bat 'echo Hello, World!' }

    build job: 'HelloWorldLoop', wait: false

}

(2) Open Procexp on slave node and watch "Handles"-count rise of the process ip2launcher.exe

 

With every run, there is a new open handle to "\Device\NamedPipe".After ~3000 open handles you can not start even simple GUI applications (cmd, paint, ...). You have to restart the slave agent to go on. I can not open the details in procexp so sorry, I can not provide more details without further instructions (overlooked something obvious? Not used to java-programs...). 

This sounds similar to JENKINS-43199">JENKINS-43199 but this one should be resolved in 2.73.3, shouldn't it?

 

---
Originally reported by peterschneider255, imported from: Leaking Handles to \Device\NamedPipe on slave (Win7, JNLP)

• status: Open
  
• priority: Major
  
• component(s): durable-task-plugin
  
• label(s): leak, triaged-2018-11, windows
  
• resolution: Unresolved
  
• votes: 0
  
• watchers: 2
  
• imported: 2025-12-09
  

Raw content of original issue

Steps to reproduce:


(1) Create a simple, self calling pipeline script 'HelloWorldLoop' and start it:


stage('Foo') { 

    node('test-node') { bat 'echo Hello, World!' } 

    build job: 'HelloWorldLoop', wait: false

}


(2) Open Procexp on slave node and watch "Handles"-count rise of the process ip2launcher.exe


 


With every run, there is a new open handle to "\Device\NamedPipe".After ~3000 open handles you can not start even simple GUI applications (cmd, paint, ...). You have to restart the slave agent to go on. I can not open the details in procexp so sorry, I can not provide more details without further instructions (overlooked something obvious? Not used to java-programs...). 


This sounds similar to JENKINS-43199 but this one should be resolved in 2.73.3, shouldn't it?


 

environment

```
- Jenkins 2.73.3

- Windows 7 Slave, jre1.8.0_151

- Windows Server 2012 R2 Master, jre1.8.0_144

- System Information Master: https://pastebin.com/jNpYPcxR

- System Information Slave: https://pastebin.com/VmfHq5GV

- Plugins: https://pastebin.com/0kafvmwa

- Connection over JNLP

- master and slave run as User, NOT as a Service
```