Job stuck on unpacking global JDK tool

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1

We have a freestyle job that is configured to use JDK installed from Global tools configuration for JDK. When the job runs it seems to unpack and install and takes forever and the job never seems to complete.

This used to run fine as the global tool had already installed the JDK in the tools directory for the agent and this job has run fine for months until now. It seems to be deleting and installing the JDK at the same time…?

We are also looking to any possible security changes from our organization that might be flagging the JDK version.

Jenkins setup: 
Jenkins: 2.426.1
OS: Windows Server 2019 - 10.0
Java: 11.0.14.1 - Azul Systems, Inc. (OpenJDK 64-Bit Server VM)
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1 Like
2

We are having a very very similar issue but on linux and also with an azul openjdk. It starts running and simply just keeps on downloading, deleting and unpacking the JDK over and over again. When I follow this process on the agent, You see the JDK appear and getting unpacked and after a few moments it just gets removed and the process starts again.

The timeline for OPs post and ours is just too coincidental. We havent changed anything to these pipelines in weeks. I tried finding logging but havent found anything useful. Id like to post more data but not sure what is needed. Is there a way to get more verbose logging on the pipeline?

2 Likes
3

Same problem here, on linux, and happy to have found this thread. Builds worked fine until including Wednesday evening CET. Then starting on Thursday morning we started to see build failures. It seems that every single build re-unpacks the jdk binary, although the folder actually exists on the file system:

image
image1237×558 69 KB

1 Like
4

The screenshot in my previous post is confusing since it happens to be from a build where we tried a newer JDK minor version. But it looks the same without that, here is an example:

image
image1256×741 91.4 KB

We found a workaround: Remove the “Install automatically” option for this JDK installation under Manage Jenkins > Tools > JDK installations. That will prevent any re-download of the JDK and “solves” the problem for us for now.

1 Like
5

Hi @stefanthurnherr ,

It is interesting to see others in the community observing the same issue.

Thanks for providing the temporary workaround! We ended up doing something similar too, by installing JDK locally on all of our agents.

Thanks!

skha

1 Like
6

It looks like something happened between Dec 11th and Dec 15th (that’s when we started seeing the “Unpacking” message repeatedly).
If you have multiple jobs running in parallel it can cause crashes too, not just a slowdown.

The following check from jdk-tool-plugin does not seem to work anymore. And it doesn’t see the already existing installation.

FilePath marker = expectedLocation.child(".installedByHudson");
            if (marker.exists() && marker.readToString().equals(id)) {
                return expectedLocation;
            }

Running ls -al /opt/jenkins/tools/hudson.model.JDK/jdk18 shows only the .timestamp file and the extracted jdk folder … just like in the screenshot above.
It looks like the .installedByHudson marker does not get saved to disk anymore.

Not sure how to fix it, but disabling the “Install Automatically” option is not a long-term solution

3 Likes
7

We are facing the same issue since last week. But i dont understand it. We’re running on an old Jenkins LTS 2.346.3 Version, we did not changed anything this month, Even no Plugin Updates. But we see that jenkins tries to unpack the JDK Tools on every run, even if they are already on the machine.

Currently some pipelines do not work because they overwrite each other’s JDK during the run.

I’m not sure if it only faces zulujdk or also the other jdk versions we are using. I’ll let you know.

2 Likes
8

interesting why all of the sudden it started on all of my Jenkins controllers at the same time when I only updated one of them and I do see that my plugin version for JDK-tool is on version 73.vddf737284550. So, this must be bug introduced in some recent release of the plugin.

9

So i too have this issue with downloading the JDK from Azul’s CDN. Is there a fix for it?

10

I can’t duplicate the issue as described here. I made my best guess of the configuration that was being used and created a repository that attempts to duplicate the configuration that I tested. If others can provide more details that will allow the problem to be duplicated, we may be able to fix the issue.

The repository is:

Background

On Dec 15, 2023, the Artifactory repository configuration was changed to reduce its bandwidth consumption. Instead of providing a full cache of Apache Maven Central, Jenkins developers now download dependencies from Apache Maven Central. Dependencies that are published by the Jenkins project continue to be downloaded from the Jenkins artifact repository. The details and history of that change are included in Jenkins infra help desk ticket 3842.

As a result of the Artifactory bandwidth reduction, the crawler job that generates the list of downloadable tool installers was broken. A fix was provided by adding Maven Central to the Grape search list in pull request 134.

Further improvements were made to the crawler by upgrading to the latest HTMLUnit in pull request 135 and upgrading to Java 17 in pull request 136.

The period when crawler updates were delayed might have caused an issue. The content of the crawler data files might have changed. There might be no relation between the crawler updates of Dec 15, 2023 and this report. I can’t tell without being able to duplicate the problem.

11

just want to give +1 on this issue.

[Pipeline] }
[Pipeline] // stage
[Pipeline] withEnv
[Pipeline] {
[Pipeline] withEnv
[Pipeline] {
[Pipeline] stage
[Pipeline] { (Declarative: Tool Install)
[Pipeline] tool
Unpacking https://cdn.azul.com/zulu/bin/zulu17.46.19-ca-fx-jdk17.0.9-linux_x64.tar.gz to /var/jenkins_home/tools/hudson.model.JDK/JAVA17 on Jenkins
[Pipeline] envVarsForTool
Unpacking https://cdn.azul.com/zulu/bin/zulu17.46.19-ca-fx-jdk17.0.9-linux_x64.tar.gz to /var/jenkins_home/tools/hudson.model.JDK/JAVA17 on Jenkins
[Pipeline] tool
[Pipeline] envVarsForTool
[Pipeline] }
[Pipeline] // stage
[Pipeline] withEnv
[Pipeline] {
[Pipeline] stage
[Pipeline] { (Prepare)
[Pipeline] tool
Unpacking https://cdn.azul.com/zulu/bin/zulu17.46.19-ca-fx-jdk17.0.9-linux_x64.tar.gz to /var/jenkins_home/tools/hudson.model.JDK/JAVA17 on Jenkins
[Pipeline] envVarsForTool
Unpacking https://cdn.azul.com/zulu/bin/zulu17.46.19-ca-fx-jdk17.0.9-linux_x64.tar.gz to /var/jenkins_home/tools/hudson.model.JDK/JAVA17 on Jenkins
[Pipeline] tool
[Pipeline] envVarsForTool
[Pipeline] withEnv
[Pipeline] {
[Pipeline] powershell
12

Why is this topic now solved? The workaround is no final Solution.

Here are more informations:
Jenkins Version LTS 2.346.3
Running on Ubuntu
Jenkins nodes also Ubuntu Linux VMs

ZuluJDK Setup:

image
image1256×630 27.5 KB

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Oracle Java SE Development Kit Installer Plugin (jdk-tool): 63.v62d2fd4b_4793
Pipeline: GitHub Groovy Libraries (pipeline-github-lib): 1.0
Autofavorite for Blue Ocean (blueocean-autofavorite): 1.2.5
Schedule Build Plugin (schedule-build): 345.vc2d8f6ef9182
Docker Pipeline (docker-workflow): 1.26
Cucumber reports (cucumber-reports): 5.7.5
External Workspace Manager Plugin (external-workspace-manager): 1.2.3
Conditional BuildStep (conditional-buildstep): 1.4.1
Pipeline: Basic Steps (workflow-basic-steps): 994.vd57e3ca_46d24
HTML Publisher plugin (htmlpublisher): 1.25
Mailer Plugin (mailer): 435.438.v5b_81173f5b_a_1
bouncycastle API Plugin (bouncycastle-api): 2.27
Pipeline: Build Step (pipeline-build-step): 488.v8993df156e8d
Blue Ocean Core JS (blueocean-core-js): 1.26.0
LDAP Plugin (ldap): 659.v8ca_b_a_fe79fa_d
SSH Credentials Plugin (ssh-credentials): 1.18.2
Git plugin (git): 4.7.1
Bitbucket Branch Source Plugin (cloudbees-bitbucket-branch-source): 2.9.9
HTTP Request Plugin (http_request): 1.16
REST API for Blue Ocean (blueocean-rest): 1.26.0
SSH Build Agents plugin (ssh-slaves): 1.32.0

Problem:
On every run, jenkins unpacks the zuluJDK Version again and again.
I checked before a run whether the jdk version is already in the tools folder on the node, and yes the files are all there and also have the correct authorization for the jenkins service user.

We did not make any changes to our Jenkins systems in December. I therefore don’t understand why this problem is occurring all of a sudden. The problem occurs on all of our Linux nodes (we have 4)

13

I also don’t understand why this issue is resolved. I have updated to Jenkins 2.437 and i still have this issue. My builds fail as soon as two builds run in parallel due to the JDK being overwritten. Where can i find the ID of JDK, so that i can create the .installedByHudson file by hand and have a workaround for now?

1 Like
14

@MarkEWaite and btw, i am not using the JDKs you are referencing, i am unpacking Azul JDK from this URL: https://cdn.azul.com/zulu/bin/zulu21.30.15-ca-jdk21.0.1-linux_x64.zip
This always used to work just fine.

15

i have another pipeline where this package is used and it unarchives it every time:

Unpacking https://cdn.azul.com/zulu/bin/zulu21.30.15-ca-jdk21.0.1-linux_x64.tar.gz to /appdata/jenkins/prd/tools/hudson.model.JDK/zulujdk21 on

16

It seems the cdn.azul.com is not setting the last-modified header in the http response. This field is used by the tool installer to check whether a tool needs to be updated or not.
When I download the jdk in Jenkins a file .timestamp is create that has 1.1.1970 as last modified.
If using an adoptium jdk that downloads from github, the problem should not be there.

17

A solution would be for http urls to also read and validate the etag header

18

Downloading a tool installer from outside your own Jenkins environment is not recommended. It makes your Jenkins environment reliant on the network and on the provider of that download. The Jenkins JDK tool installer plugins (Eclipse Temurin and Oracle) include the following usage recommendations:

Usage recommendations

We want to warn that this plugin is NOT a good practice for production environments. As it relies on the Oracle’s website to do the job, it’s highly likely to stop working. It could happen because Oracle’s website change or even if Oracle bans our downloads due to excessive bandwidth or whatever other reason).

The recommended approach is to download the JDK distribution using other installers, for example downloading it from a well known URL (preferably hosted on your own network) with ZIP Tool Installer, having it pre-installed in agent docker images, or executing a script to do the job.

19

This actually happens when installing the JDK by extracting it from a URL:

image
image841×879 30.5 KB

20

But as far as I can tell, it only happens when attempting to download from the Azul content delivery network, not from a locally hosted web server. At least I’m unable to duplicate the issue when downloading from the nginx server that I run locally with JDK tar and zip files.