Plugin installation failed. No manifest at /plugins/<plugin-name>/META-INF/MANIFEST.MF

THE SETUP

Operating System: OS/400 (a.k.a IBMi Server)

Java Version: Please see below

cecuser@p1313-pvm1:~/jenkins_home $ java -version
java version "17.0.10" 2024-01-16
IBM Semeru Runtime Certified Edition (build 17.0.10+7)
Eclipse OpenJ9 VM (build openj9-0.43.0, JRE 17 OS/400 ppc64-64-Bit Compressed References 20240224_000000 (JIT enabled, AOT enabled)
OpenJ9   - 2c3d78b48
OMR      - ea8124dbc
JCL      - dde9c9ccfe1 based on jdk-17.0.10+7)

Installed Plugins: Currently No Plugins are installed

How Jenkins is Run: via WAR file

Reverse Proxy setup: No

How is it installed: First, wget http://mirrors.jenkins.io/war-stable/latest/jenkins.war and then did a java -jar with required parameters as below

java -DJENKINS_HOME=/home/cecuser/jenkins_home -jar '/home/cecuser/jenkins/jenkins.war' '--httpPort=9095'

Browser: Chrome 131.0.6778.109



THE PROBLEM

I have used Jenkins previously (5-6 months ago) on this same IBMi server and was able to install the plugins without any issues. But now I tried to do a fresh installation and the plugins are not getting installed. I know Jenkins is not officially supported for OS/400 (a.k.a IBM i) architecture, but I wouldn’t have posted this question if it worked previously. I also tried uploading the .hpi files manually, but still the plugin installation fails. Below is the error message from my log.

It says the manifest file is not found?

2024-12-12 10:47:52.025+0000 [id=249]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of ssh-slaves on behalf of admin
2024-12-12 10:47:52.025+0000 [id=249]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading ssh-slaves
2024-12-12 10:47:52.199+0000 [id=249]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install ssh-slaves
java.io.IOException: Plugin installation failed. No manifest at /home/cecuser/jenkins_home/plugins/ssh-slaves/META-INF/MANIFEST.MF
	at hudson.ClassicPluginStrategy.createPluginWrapper(ClassicPluginStrategy.java:169)
	at hudson.PluginManager.dynamicLoad(PluginManager.java:964)
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2379)
Caused: java.io.IOException: Failed to dynamically deploy this plugin
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2383)
	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:2012)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:121)
	at java.base/java.lang.Thread.run(Thread.java:857)
2024-12-12 10:47:52.199+0000 [id=249]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of matrix-auth on behalf of admin
2024-12-12 10:47:52.231+0000 [id=249]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install matrix-auth
java.io.IOException: Plugin installation failed. No manifest at /home/cecuser/jenkins_home/plugins/matrix-auth/META-INF/MANIFEST.MF
	at hudson.ClassicPluginStrategy.createPluginWrapper(ClassicPluginStrategy.java:169)
	at hudson.PluginManager.dynamicLoad(PluginManager.java:964)
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2379)
Caused: java.io.IOException: Failed to dynamically deploy this plugin
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2383)
	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:2012)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:121)
	at java.base/java.lang.Thread.run(Thread.java:857)
2024-12-12 10:47:52.231+0000 [id=249]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of pam-auth on behalf of admin
2024-12-12 10:47:52.232+0000 [id=249]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading pam-auth
2024-12-12 10:47:52.408+0000 [id=249]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install pam-auth
java.io.IOException: Plugin installation failed. No manifest at /home/cecuser/jenkins_home/plugins/pam-auth/META-INF/MANIFEST.MF
	at hudson.ClassicPluginStrategy.createPluginWrapper(ClassicPluginStrategy.java:169)
	at hudson.PluginManager.dynamicLoad(PluginManager.java:964)
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2379)
Caused: java.io.IOException: Failed to dynamically deploy this plugin
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2383)
	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:2012)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:121)
	at java.base/java.lang.Thread.run(Thread.java:857)
2024-12-12 10:47:52.408+0000 [id=249]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of ldap on behalf of admin
2024-12-12 10:47:52.408+0000 [id=249]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading ldap
2024-12-12 10:47:53.533+0000 [id=249]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install ldap
java.io.IOException: Plugin installation failed. No manifest at /home/cecuser/jenkins_home/plugins/ldap/META-INF/MANIFEST.MF
	at hudson.ClassicPluginStrategy.createPluginWrapper(ClassicPluginStrategy.java:169)
	at hudson.PluginManager.dynamicLoad(PluginManager.java:964)
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2379)
Caused: java.io.IOException: Failed to dynamically deploy this plugin
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2383)
	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:2012)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:121)
	at java.base/java.lang.Thread.run(Thread.java:857)
2024-12-12 10:47:53.533+0000 [id=249]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of email-ext on behalf of admin
2024-12-12 10:47:53.534+0000 [id=249]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading email-ext
2024-12-12 10:47:53.805+0000 [id=249]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install email-ext
java.io.IOException: Plugin installation failed. No manifest at /home/cecuser/jenkins_home/plugins/email-ext/META-INF/MANIFEST.MF
	at hudson.ClassicPluginStrategy.createPluginWrapper(ClassicPluginStrategy.java:169)
	at hudson.PluginManager.dynamicLoad(PluginManager.java:964)
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2379)
Caused: java.io.IOException: Failed to dynamically deploy this plugin
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2383)
	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:2012)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:121)
	at java.base/java.lang.Thread.run(Thread.java:857)
2024-12-12 10:47:53.806+0000 [id=249]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of mailer on behalf of admin
2024-12-12 10:47:53.840+0000 [id=249]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install mailer
java.io.IOException: Plugin installation failed. No manifest at /home/cecuser/jenkins_home/plugins/mailer/META-INF/MANIFEST.MF
	at hudson.ClassicPluginStrategy.createPluginWrapper(ClassicPluginStrategy.java:169)
	at hudson.PluginManager.dynamicLoad(PluginManager.java:964)
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2379)
Caused: java.io.IOException: Failed to dynamically deploy this plugin
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2383)
	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:2012)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:121)
	at java.base/java.lang.Thread.run(Thread.java:857)
2024-12-12 10:47:53.840+0000 [id=249]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of theme-manager on behalf of admin
2024-12-12 10:47:53.841+0000 [id=249]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading theme-manager
2024-12-12 10:47:54.013+0000 [id=249]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install theme-manager
java.io.IOException: Plugin installation failed. No manifest at /home/cecuser/jenkins_home/plugins/theme-manager/META-INF/MANIFEST.MF
	at hudson.ClassicPluginStrategy.createPluginWrapper(ClassicPluginStrategy.java:169)
	at hudson.PluginManager.dynamicLoad(PluginManager.java:964)
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2379)
Caused: java.io.IOException: Failed to dynamically deploy this plugin
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2383)
	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:2012)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:121)
	at java.base/java.lang.Thread.run(Thread.java:857)
2024-12-12 10:47:54.013+0000 [id=249]	INFO	h.model.UpdateCenter$DownloadJob#run: Starting the installation of dark-theme on behalf of admin
2024-12-12 10:47:54.014+0000 [id=249]	INFO	h.m.UpdateCenter$UpdateCenterConfiguration#download: Downloading dark-theme
2024-12-12 10:47:54.166+0000 [id=249]	SEVERE	h.model.UpdateCenter$DownloadJob#run: Failed to install dark-theme
java.io.IOException: Plugin installation failed. No manifest at /home/cecuser/jenkins_home/plugins/dark-theme/META-INF/MANIFEST.MF
	at hudson.ClassicPluginStrategy.createPluginWrapper(ClassicPluginStrategy.java:169)
	at hudson.PluginManager.dynamicLoad(PluginManager.java:964)
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2379)
Caused: java.io.IOException: Failed to dynamically deploy this plugin
	at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:2383)
	at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:2012)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:121)
	at java.base/java.lang.Thread.run(Thread.java:857)
2024-12-12 10:47:54.167+0000 [id=249]	INFO	h.m.UpdateCenter$CompleteBatchJob#run: Completing installing of plugin batch…
2024-12-12 10:47:54.356+0000 [id=356]	INFO	jenkins.InitReactorRunner$1#onAttained: Started initialization
2024-12-12 10:47:54.359+0000 [id=360]	INFO	jenkins.InitReactorRunner$1#onAttained: Listed all plugins
2024-12-12 10:47:54.361+0000 [id=365]	INFO	jenkins.InitReactorRunner$1#onAttained: Prepared all plugins
2024-12-12 10:47:54.364+0000 [id=370]	INFO	jenkins.InitReactorRunner$1#onAttained: Started all plugins
2024-12-12 10:47:54.366+0000 [id=375]	INFO	jenkins.InitReactorRunner$1#onAttained: Augmented all extensions
2024-12-12 10:47:54.369+0000 [id=381]	INFO	jenkins.InitReactorRunner$1#onAttained: System config loaded
2024-12-12 10:47:54.371+0000 [id=385]	INFO	jenkins.InitReactorRunner$1#onAttained: System config adapted
2024-12-12 10:47:54.374+0000 [id=390]	INFO	jenkins.InitReactorRunner$1#onAttained: Loaded all jobs
2024-12-12 10:47:54.376+0000 [id=394]	INFO	jenkins.InitReactorRunner$1#onAttained: Configuration for all jobs updated
2024-12-12 10:47:54.380+0000 [id=400]	INFO	jenkins.InitReactorRunner$1#onAttained: Completed initialization
2024-12-12 10:47:54.382+0000 [id=249]	INFO	h.m.UpdateCenter$CompleteBatchJob#run: Completed installation of 0 plugins in 21 sec
2024-12-12 10:48:08.715+0000 [id=121]	INFO	winstone.Logger#logInternal: JVM is terminating. Shutting down Jetty
2024-12-12 10:48:08.716+0000 [id=121]	INFO	org.eclipse.jetty.server.Server#doStop: Stopped oejs.Server@378068f7{STOPPING}[12.0.14,sto=0]
2024-12-12 10:48:08.743+0000 [id=121]	INFO	o.e.j.server.AbstractConnector#doStop: Stopped ServerConnector@564f5800{HTTP/1.1, (http/1.1)}{0.0.0.0:9095}
2024-12-12 10:48:08.748+0000 [id=121]	INFO	hudson.lifecycle.Lifecycle#onStatusUpdate: Stopping Jenkins
2024-12-12 10:48:08.751+0000 [id=121]	INFO	jenkins.model.Jenkins$16#onAttained: Started termination
2024-12-12 10:48:08.762+0000 [id=121]	INFO	jenkins.model.Jenkins$16#onAttained: Completed termination
2024-12-12 10:48:08.762+0000 [id=121]	INFO	jenkins.model.Jenkins#_cleanUpDisconnectComputers: Starting node disconnection
2024-12-12 10:48:08.769+0000 [id=121]	INFO	jenkins.model.Jenkins#_cleanUpShutdownPluginManager: Stopping plugin manager
2024-12-12 10:48:08.769+0000 [id=121]	INFO	jenkins.model.Jenkins#_cleanUpPersistQueue: Persisting build queue
2024-12-12 10:48:08.779+0000 [id=121]	INFO	jenkins.model.Jenkins#_cleanUpAwaitDisconnects: Waiting for node disconnection completion
2024-12-12 10:48:08.779+0000 [id=121]	INFO	hudson.lifecycle.Lifecycle#onStatusUpdate: Jenkins stopped
2024-12-12 10:48:08.789+0000 [id=121]	INFO	winstone.Logger#logInternal: Jetty shutdown successfully

I did the basic troubleshooting as per this guide Fix Jenkins Plugin Installation Failed Error: A Deep Guide - DevopsRoles.com Better 2024, and yet couldn’t figure out.

Any help is greatly appreciated.
Thanks,
Ravi.