[JENKINS-46523] FATAL: Could not initialize class hudson.util.ProcessTree$UnixReflection

[jenkins-infra-bot]

Intermittently I keep getting failed build status due to the following repeated error log. Note that this is not consistent behaviour. I will get a few builds completely successful triggered on a merge request to my Git repo and then a following build job would fail with the reported issue.
java.lang.NoClassDefFoundError: Could not initialize class hudson.util.ProcessTree$UnixReflection*08:12:19* at hudson.util.ProcessTree$UnixProcess.kill(ProcessTree.java:647)08:12:19 at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:668)08:12:19 at hudson.util.ProcessTree$Unix.killAll(ProcessTree.java:589)08:12:19 at hudson.Launcher$LocalLauncher.kill(Launcher.java:949)08:12:19 at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:496)08:12:19 at hudson.model.Run.execute(Run.java:1735)08:12:19 at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)08:12:19 at hudson.model.ResourceController.execute(ResourceController.java:97)08:12:19 at hudson.model.Executor.run(Executor.java:415)

---

Originally reported by bitmaven, imported from: FATAL: Could not initialize class hudson.util.ProcessTree$UnixReflection

• assignee: oleg_nenashev
• status: Resolved
• priority: Major
• component(s): core
• label(s): java11
• resolution: Fixed
• resolved: 2018-10-01T21:58:09+00:00
• votes: 0
• watchers: 7
• imported: 2025-11-24

Raw content of original issue

Intermittently I keep getting failed build status due to the following repeated error log. Note that this is not consistent behaviour. I will get a few builds completely successful triggered on a merge request to my Git repo and then a following build job would fail with the reported issue.
java.lang.NoClassDefFoundError: Could not initialize class hudson.util.ProcessTree$UnixReflection*08:12:19* 	at hudson.util.ProcessTree$UnixProcess.kill(ProcessTree.java:647)08:12:19 	at hudson.util.ProcessTree$UnixProcess.killRecursively(ProcessTree.java:668)08:12:19 	at hudson.util.ProcessTree$Unix.killAll(ProcessTree.java:589)08:12:19 	at hudson.Launcher$LocalLauncher.kill(Launcher.java:949)08:12:19 	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:496)08:12:19 	at hudson.model.Run.execute(Run.java:1735)08:12:19 	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)08:12:19 	at hudson.model.ResourceController.execute(ResourceController.java:97)08:12:19 	at hudson.model.Executor.run(Executor.java:415)

environment

Jenkins 2.70 Installed on Ubuntu 14. JDK 1.8, Installed Plugins include:<br/>
Android Emulator Plugin ver 2.15		<br/>
Ant Plugin ver 1.5		<br/>
Authentication Tokens API Plugin ver 1.3		<br/>
bouncycastle API Plugin ver 2.16.1		<br/>
Branch API Plugin ver 2.0.10		<br/>
build timeout plugin ver 1.18		<br/>
Credentials Binding Plugin ver 1.12		<br/>
Credentials Plugin ver 2.1.14		<br/>
Display URL API ver 2.0		<br/>
Docker Commons Plugin ver 1.8		<br/>
Docker Pipeline ver 1.12		<br/>
Durable Task Plugin ver 1.14		<br/>
Email Extension Plugin ver 2.58		<br/>
Email Extension Template Plugin ver 1.0		<br/>
External Monitor Job Type Plugin ver 1.7		<br/>
Folders Plugin ver 6.1.2	<br/>
Git client plugin ver 2.5.0	<br/>
Git plugin ver 3.5.0	<br/>
GIT server Plugin ver 1.7		<br/>
GitHub API Plugin ver 1.86		<br/>
GitHub Branch Source Plugin ver 2.0.8			<br/>
GitHub plugin ver 1.27.0		<br/>
Gitlab Authentication plugin ver 1.0.9		<br/>
Gitlab Merge Request Builder ver 2.0.0		<br/>
GitLab Plugin ver 1.4.7	<br/>
Gradle Plugin ver 1.27.1		<br/>
Icon Shim Plugin ver 2.0.3		<br/>
Jackson 2 API Plugin ver 2.7.3		<br/>
Javadoc Plugin ver 1.4		<br/>
JavaScript GUI Lib: ACE Editor bundle plugin. ver 1.1		<br/>
JavaScript GUI Lib: Handlebars bundle plugin. ver 1.1.1		<br/>
JavaScript GUI Lib: jQuery bundles (jQuery and jQuery UI) plugin. ver 1.2.1		<br/>
JavaScript GUI Lib: Moment.js bundle plugin. ver 1.1.1		<br/>
JIRA plugin ver 2.4.2	<br/>
JUnit Plugin ver 1.20		<br/>
LDAP Plugin ver 1.16		<br/>
Mailer Plugin ver 1.20		<br/>
MapDB API Plugin ver 1.0.9.0		<br/>
Matrix Authorization Strategy Plugin ver 1.7		<br/>
Matrix Project Plugin ver 1.11		<br/>
Maven Integration plugin ver 2.17		<br/>
Maven Repository Scheduled Cleanup Plugin ver 1.2		<br/>
OWASP Markup Formatter Plugin ver 1.5		<br/>
PAM Authentication plugin ver 1.3		<br/>
Pipeline ver 2.5		<br/>
Pipeline Graph Analysis Plugin ver 1.4		<br/>
Pipeline: API ver 2.18		<br/>
Pipeline: Basic Steps ver 2.6		<br/>
Pipeline: Build Step ver 2.5.1		<br/>
Pipeline: Declarative Agent API ver 1.1.1		<br/>
Pipeline: Declarative Extension Points API ver 1.1.8		<br/>
Pipeline: GitHub Groovy Libraries ver 1.0		<br/>
Pipeline: Groovy ver 2.36.1		<br/>
Pipeline: Input Step ver 2.8	<br/>
Pipeline: Job ver 2.13		<br/>
Pipeline: Milestone Step ver 1.3.1		<br/>
Pipeline: Model API ver 1.1.8	<br/>
Pipeline: Model Definition ver 1.1.8		<br/>
Pipeline: Multibranch ver 2.16		<br/>
Pipeline: Nodes and Processes ver 2.12		<br/>
Pipeline: REST API Plugin ver 2.8		<br/>
Pipeline: SCM Step ver 2.6		<br/>
Pipeline: Shared Groovy Libraries ver 2.8		<br/>
Pipeline: Stage Step ver 2.2<br/>
Pipeline: Stage Tags Metadata ver 1.1.8		<br/>
Pipeline: Stage View Plugin ver 2.8		<br/>
Pipeline: Step API ver 2.12		<br/>
Pipeline: Supporting APIs ver 2.14		<br/>
Plain Credentials Plugin ver 1.4		<br/>
Port Allocator Plug-in ver 1.8		<br/>
Publish Over Dropbox ver 1.2.0		<br/>
Publish Over FTP ver 1.12		<br/>
Resource Disposer Plugin ver 0.6		<br/>
Role-based Authorization Strategy ver 2.5.1		<br/>
SCM API Plugin ver 2.2.0	<br/>
Script Security Plugin ver 1.31	<br/>
Downgrade to 1.29.1<br/>
SSH Credentials Plugin ver 1.13		<br/>
SSH Slaves plugin ver 1.20		<br/>
Structs Plugin ver 1.9		<br/>
Subversion Plug-in ver 2.9		<br/>
Subversion Workspace Cleaner ver 1.1		<br/>
Timestamper ver 1.8.8		<br/>
Token Macro Plugin ver 2.1		<br/>
Windows Slaves Plugin ver 1.3.1		<br/>
Workspace Cleanup Plugin ver 0.34	<br/>
Xcode integration ver 2.0.0

[jenkins-infra-bot]

aviv_yam:

• Original comment link
• Raw content of original comment:

  I had the same issue. soled it by downgrading java from 1.9 to 1.8u45
  

I had the same issue. soled it by downgrading java from 1.9 to 1.8u45

[jenkins-infra-bot]

ljschiefer:

• Original comment link
• Raw content of original comment:

  Seeing the same thing on Mac OS X High Sierra (10.13.1) running Java 1.9 (build 9_181):
  
  $ java -version
  java version "9"
  Java(TM) SE Runtime Environment (build 9+181)
  Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode)
  
  
  This happens whenever the shell is used to execute other processes, such as fastlane to build iOS apps, which in turn calls xcode.
  I downgraded Java to 1.8u144 and was able to build.
  

Seeing the same thing on Mac OS X High Sierra (10.13.1) running Java 1.9 (build 9_181):

$ java -version
java version "9"
Java(TM) SE Runtime Environment (build 9+181)
Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode)

This happens whenever the shell is used to execute other processes, such as fastlane to build iOS apps, which in turn calls xcode.

I downgraded Java to 1.8u144 and was able to build.

[jenkins-infra-bot]

dheid:

• Original comment link
• Raw content of original comment:

  This is not a plugin specific problem, but depends on Jenkins overall Java 9 compatibility. Closing this ticket. You can reopen it, if the problems still occurs after https://issues.jenkins-ci.org/browse/JENKINS-40689 has been solved.
  

This is not a plugin specific problem, but depends on Jenkins overall Java 9 compatibility. Closing this ticket. You can reopen it, if the problems still occurs after https://issues.jenkins-ci.org/browse/JENKINS-40689 has been solved.

[jenkins-infra-bot]

oleg_nenashev:

• Original comment link
• Raw content of original comment:

  The issue is still there. I see it in Java 11 tests
  
   
  

The issue is still there. I see it in Java 11 tests

 

[jenkins-infra-bot]

oleg_nenashev:

• Original comment link
• Raw content of original comment:

  I'll take it
  

I'll take it

[jenkins-infra-bot]

timur_suleimanov:

• Original comment link
• Raw content of original comment:

  I have the same issue with java 11.
  

I have the same issue with java 11.

[jenkins-infra-bot]

arunp1990:

• Original comment link
• Raw content of original comment:

  I also faced this issue intermittently. But, the no. of occurrences of failure is really high compared to success. Adding a sleep of 4 minutes at the end of script made it work. Artifactory plugin publishes artifacts after the script finishes. Somehow artifacts are always published, but afterwards, this error happens.
  
  The issue was not reproducible for iOS build happening on the same slave machine. Only Android build had this issue. So, I did not explore along the line of java version problem mentioned here.
  

I also faced this issue intermittently. But, the no. of occurrences of failure is really high compared to success. Adding a sleep of 4 minutes at the end of script made it work. Artifactory plugin publishes artifacts after the script finishes. Somehow artifacts are always published, but afterwards, this error happens.

The issue was not reproducible for iOS build happening on the same slave machine. Only Android build had this issue. So, I did not explore along the line of java version problem mentioned here.

[jenkins-infra-bot]

gautamdas:

• Original comment link
• Raw content of original comment:

  Hi oleg_nenashev arunp1990 I am still facing this issue quite frequently while running a Jenkins Maven Project. Not sure how to resolve it. I tried all the steps mentioned in above comments but none of them worked.
  
  Below are few other details:-
  
  Java Version - 1.8.0_231
  
  Jenkins Version - 2.235.1
  
  Please do let me know if any further info is required.
  

Hi oleg_nenashev arunp1990 I am still facing this issue quite frequently while running a Jenkins Maven Project. Not sure how to resolve it. I tried all the steps mentioned in above comments but none of them worked.

Below are few other details:-

Java Version - 1.8.0_231

Jenkins Version - 2.235.1

Please do let me know if any further info is required.

[jenkins-infra-bot]

[Original is_duplicated_by from Jira: JENKINS-54561]

[jenkins-infra-bot]

[Original is_duplicated_by from Jira: JENKINS-47351]

[jenkins-infra-bot]

[Original is_duplicated_by from Jira: JENKINS-56046]