Install button not visible in plugin manager in jenkins

6
votes

I am trying to download some plugins via Manage Plugins in Jenkins but strangely I do not see any "Install without restart" or "Download now and install after restart" button at the bottom of the Plugin Manager in the web UI, hence I am not able to install any plugin. Need help to fix it.

Image of the WebUI

Jenkins version : 2.260

Can see below error in the logs :

Oct 06, 2020 5:52:57 PM WARNING hudson.init.impl.InstallUncaughtExceptionHandler handleException null org.apache.commons.jelly.JellyTagException: jar:file:/var/cache/jenkins/war/WEB-INF/lib/jenkins-core-2.260.jar!/lib/layout/isAdmin.jelly:28:21: <d:invokeBody> java.lang.StackOverflowError

3
jenkinsjenkins-plugins
Same in Jenkins 2.249.1 using jenkins/jenkins:lts docker image. – gudbrand3
Same in Jenkins 2.249.1 using Bitnami AWS AMI – bobbyt
I am also experiencing this with Jenkins jenkins4eval/jenkins:2.250-alpine-arm64 docker image. – Cameron Rosier

3 Answers

3
votes

There was an issue with the Jenkins update center which stands resolved. A plugin was added that had a dependency on itself.

https://issues.jenkins-ci.org/browse/JENKINS-63877

You might need to click on "Check Now" to get rid of the cached local data and the install button should be visible.

1
votes

it seems to depend on a broken JSON on https://updates.jenkins.io/update-center.json

Workaround: manually download and repair the JSON

curl https://updates.jenkins.io/current/update-center.json | sed -e 's/^{/'$(printf "\x1e")'{/' | jq --seq . > /var/lib/jenkins/update-center.json

set Update Site on Plugin Manager > Advanced > Update Site

URL file:///var/lib/jenkins/update-center.json
-1
votes

I have the same problem ... different fresh systems (ami linux 2, ubuntu, ...). Same result. In jenkins manage plugins I don't see the "Install without restart" or "Download now and install after restart" button on bottom. :(

Other older installations has no problem.