When attempting to use the jenkins-cli.jar shipped with Jenkins 2.481 (or 2.480) over SSH to Jenkins 2.481 (or 2.480), it hangs.

NOTE: The examples below are with Jenkins unlocked (no user/name password required). With Jenkins locked (user/name password required) and a public key added for this SSH connection, the same symptoms are experienced.

Using the jenkins-cli.jar shipped with Jenkins 2.481 over SSH to Jenkins 2.481, it hangs:

$ java -jar "/tmp/kitchen/cache/jenkins-cli.jar" -s http://127.0.0.1:8080 -ssh -user "dummer_user" help
Oct 24, 2024 9:53:11 AM io.jenkins.cli.shaded.org.apache.sshd.common.util.security.AbstractSecurityProviderRegistrar getOrCreateProvider
INFO: getOrCreateProvider(EdDSA) created instance of io.jenkins.cli.shaded.net.i2p.crypto.eddsa.EdDSASecurityProvider
Oct 24, 2024 9:53:11 AM io.jenkins.cli.shaded.org.apache.sshd.common.io.DefaultIoServiceFactoryFactory getIoServiceProvider
INFO: No detected/configured IoServiceFactoryFactory; using Nio2ServiceFactoryFactory
Oct 24, 2024 9:53:11 AM io.jenkins.cli.shaded.org.apache.sshd.client.config.hosts.ConfigFileHostEntryResolver resolveEffectiveResolver
INFO: resolveEffectiveResolver(dummer_user@127.0.0.1:53801/null) no configuration file at /home/xxxx/.ssh/config

Using the jenkins-cli.jar shipped with Jenkins 2.479 over SSH to Jenkins 2.481, it works:

$ java -jar "jenkins-cli.jar" -s http://127.0.0.1:8080 -ssh -user "dummer_user" help
Oct 24, 2024 9:55:53 AM io.jenkins.cli.shaded.org.apache.sshd.common.util.security.AbstractSecurityProviderRegistrar getOrCreateProvider
INFO: getOrCreateProvider(EdDSA) created instance of io.jenkins.cli.shaded.net.i2p.crypto.eddsa.EdDSASecurityProvider
Oct 24, 2024 9:55:53 AM io.jenkins.cli.shaded.org.apache.sshd.common.io.DefaultIoServiceFactoryFactory getIoServiceProvider
INFO: No detected/configured IoServiceFactoryFactory; using Nio2ServiceFactoryFactory
Oct 24, 2024 9:55:53 AM io.jenkins.cli.shaded.org.apache.sshd.client.config.hosts.ConfigFileHostEntryResolver resolveEffectiveResolver
INFO: resolveEffectiveResolver(dummer_user@127.0.0.1:53801/null) no configuration file at /home/xxxx/.ssh/configOct 24, 2024 9:55:53 AM io.jenkins.cli.shaded.org.apache.sshd.client.keyverifier.DefaultKnownHostsServerKeyVerifier reloadKnownHosts
WARNING: reloadKnownHosts(/home/xxxx/.ssh/known_hosts) invalid file permissions: Permissions violation (GROUP_WRITE)
Oct 24, 2024 9:55:53 AM hudson.cli.SSHCLI$1 verifyServerKey
WARNING: Unknown host key for /127.0.0.1:53801
add-job-to-view
    Adds jobs to view.`
build
~

Hanging session with logger enabled; Using the jenkins-cli.jar shipped with Jenkins 2.481 over SSH to Jenkins 2.481:

$ java -jar "/tmp/kitchen/cache/jenkins-cli.jar" -s http://127.0.0.1:8080 -ssh -user "dummer_user" -logger ALL help
Oct 24, 2024 10:01:21 AM hudson.cli.CLI _main
FINE: using connection mode SSH
Oct 24, 2024 10:01:21 AM hudson.cli.SSHCLI sshConnection
FINE: Connecting via SSH to: 127.0.0.1:53801
Oct 24, 2024 10:01:22 AM io.jenkins.cli.shaded.org.apache.sshd.common.util.security.SecurityUtils register
FINE: register(BC) not registered - enabled=true, supported=false
Oct 24, 2024 10:01:22 AM io.jenkins.cli.shaded.org.apache.sshd.common.util.security.AbstractSecurityProviderRegistrar getOrCreateProvider
INFO: getOrCreateProvider(EdDSA) created instance of io.jenkins.cli.shaded.net.i2p.crypto.eddsa.EdDSASecurityProvider
Oct 24, 2024 10:01:22 AM io.jenkins.cli.shaded.org.apache.sshd.common.helpers.AbstractFactoryManager addSessionListener
FINEST: addSessionListener(SshClient[7bb58ca3])[io.jenkins.cli.shaded.org.apache.sshd.common.session.helpers.SessionTimeoutListener@78b1cc93] registered
Oct 24, 2024 10:01:22 AM io.jenkins.cli.shaded.org.apache.sshd.common.util.threads.SshdThreadFactory newThread
FINEST: newThread(java.lang.ThreadGroup[name=main,maxpri=10])[sshd-SshClient[7bb58ca3]-timer-thread-1] [runnable=java.util.concurrent.ThreadPoolExecutor$Worker@2aa5fe93State
Oct 24, 2024 10:01:22 AM io.jenkins.cli.shaded.org.apache.sshd.common.io.DefaultIoServiceFactoryFactory getIoServiceProvider
INFO: No detected/configured IoServiceFactoryFactory; using Nio2ServiceFactoryFactory
Oct 24, 2024 10:01:22 AM io.jenkins.cli.shaded.org.apache.sshd.common.io.nio2.Nio2Service <init>
FINEST: Creating Nio2Connector
Oct 24, 2024 10:01:22 AM io.jenkins.cli.shaded.org.apache.sshd.client.config.hosts.ConfigFileHostEntryResolver resolveEffectiveResolver
INFO: resolveEffectiveResolver(dummer_user@127.0.0.1:53801/null) no configuration file at /home/xxxx/.ssh/config
Oct 24, 2024 10:01:22 AM io.jenkins.cli.shaded.org.apache.sshd.client.config.hosts.ConfigFileHostEntryResolver resolveEffectiveHost
FINE: resolveEffectiveHost(dummer_user@127.0.0.1:53801/null) => null
Oct 24, 2024 10:01:22 AM io.jenkins.cli.shaded.org.apache.sshd.client.SshClient resolveHost
FINE: connect(dummer_user@127.0.0.1:53801) no overrides
Oct 24, 2024 10:01:22 AM io.jenkins.cli.shaded.org.apache.sshd.common.io.nio2.Nio2Connector connect
FINE: Connecting to /127.0.0.1:53801
Oct 24, 2024 10:01:22 AM io.jenkins.cli.shaded.org.apache.sshd.common.io.nio2.Nio2Service setOption
FINE: setOption(SO_REUSEADDR)[true] from property=Property[socket-reuseaddr](Boolean]
Oct 24, 2024 10:01:22 AM io.jenkins.cli.shaded.org.apache.sshd.common.util.threads.SshdThreadFactory newThread
FINEST: newThread(java.lang.ThreadGroup[name=main,maxpri=10])[sshd-SshClient[7bb58ca3]-nio2-resume-thread-1] [runnable=java.util.concurrent.ThreadPoolExecutor$Worker@60d8c9b7State
Oct 24, 2024 10:01:22 AM io.jenkins.cli.shaded.org.apache.sshd.common.io.nio2.Nio2Connector lambda$connect$1
FINE: connect(/127.0.0.1:53801): waiting for connection (timeout=60000ms)
Oct 24, 2024 10:01:22 AM io.jenkins.cli.shaded.org.apache.sshd.common.io.nio2.Nio2Session <init>
FINE: Creating IoSession on /127.0.0.1:34952 from /127.0.0.1:53801 via null