[JENKINS-56896] Shutdown message 'INFOS: JVM is terminating. Shutting down Jetty' is shown randomly

[jenkins-infra-bot]

This is funny issue I discovered recently after being pointed out by a customer.

How to reproduce

• Start Jenkins
• Wait a bit of time until it reaches full startup (no new log shown, generally ~30 to 60 seconds, say)
• Stop it with a signal/Ctrl-C
• Doing this many times, see that the message INFOS: JVM is terminating. Shutting down Jetty is not shown consistently

Expected behavior

The message should be always shown.

Asides

This seems like this is not a big deal, given this has been this way for a long time, if not forever.
I was able to reproduce it using even an old Jenkins 2.1: docker run jenkinsci/jenkins:2.1.

Technically, after a small testing, the issue seems to be that when the ShutdownHook gets called, sometimes the launcher is null ?!?

winstone/src/main/java/winstone/ShutdownHook.java

Line 23 in 79fb687

if (this.launcher != null) {

---

Originally reported by batmat, imported from: Shutdown message 'INFOS: JVM is terminating. Shutting down Jetty' is shown randomly

• status: Open
• priority: Minor
• component(s): winstone-jetty
• resolution: Unresolved
• votes: 0
• watchers: 2
• imported: 2025-11-27

Raw content of original issue

This is funny issue I discovered recently after being pointed out by a customer.

How to reproduce


	
Start Jenkins
	
Wait a bit of time until it reaches full startup (no new log shown, generally ~30 to 60 seconds, say)
	
Stop it with a signal/Ctrl-C
	
Doing this many times, see that the message INFOS: JVM is terminating. Shutting down Jetty is not shown consistently



Expected behavior

The message should be always shown. 

Asides
This seems like this is not a big deal, given this has been this way for a long time, if not forever. 
I was able to reproduce it using even an old Jenkins 2.1: docker run jenkinsci/jenkins:2.1.

Technically, after a small testing, the issue seems to be that when the ShutdownHook gets called, sometimes the launcher is null ?!?

  

    

      winstone/src/main/java/winstone/ShutdownHook.java
    
    

         Line 23
      in
      79fb687
    
  
  

    


        

          

          
 if (this.launcher != null) { 
        
    
  

[jenkins-infra-bot]

webrat:

• Original comment link
• Raw content of original comment:

  seeing this problem also from time to time
  

seeing this problem also from time to time

[jenkins-infra-bot]

webrat:

• Original comment link
• Raw content of original comment:

  Seems to be there for quite a while already: Varying shutdown messages docker#321
  
  Overall the shutdown within the docker container seems not to be clean.
  
  According to https://github.com/jenkinsci/jenkins/blob/0c2d194f0d933fdba8f5a9a1fda8adc8826981c0/core/src/main/java/jenkins/model/Jenkins.java#L3313 there should be a message like "Stopping Jenkins" which does not appear at all (logger is configured to show INFO)
  

Seems to be there for quite a while already: jenkinsci/docker#321

Overall the shutdown within the docker container seems not to be clean.

According to https://github.com/jenkinsci/jenkins/blob/0c2d194f0d933fdba8f5a9a1fda8adc8826981c0/core/src/main/java/jenkins/model/Jenkins.java#L3313 there should be a message like "Stopping Jenkins" which does not appear at all (logger is configured to show INFO)