pipeline {
    agent any    stages {
        stage('Hello') {
            steps {
            script {
                wrapWithSSHAgent("14447c72-35ae-4e24-be1c-5e962e8a5202")
                {
                   def remote = [:]
                   //Fails with following RHEL 9.2
                   remote.name = "misnomer1.fyre.ibm.com"
                   remote.host = "1.2.3.4"
                   // Works with following RHEL 7.9
                   //remote.name = "ISIMServer1.fyre.ibm.com"
                   //remote.host = "2.3.4.5"
                   remote.user = 'root'
                   remote.allowAnyHosts = true
                   remote.identityFile = env.sshKeyFileVariable
                   remote.timeoutSec = 25
                   remote.retryCount = 2
                   remote.logLevel = "FINEST"                  //sshCommand remote: remote, command: "pwd"
                   sshCommand remote: remote, command: "ls -lrt"
                   sshCommand remote: remote, command: "java -version"
                }            }
            }
        }
    }
}void wrapWithSSHAgent (String credentialID, Closure closure) {
    if (!credentialID) {
        closure();
    } else {
        wrapWithCertificateCredentials (credentialID) {
            sshagent (credentials: [credentialID]) {
                closure();
            }
        }
    }
}void wrapWithCertificateCredentials (String credentialID, String keyFileEnvVar = "sshKeyFileVariable", String userEnvVar = "sshUsername", String sshPassphraseEnvVar = "sshPassphraseVariable", Closure closure) {
    if (!credentialID) {
        closure();
    } else {
        withCredentials([[$class: 'SSHUserPrivateKeyBinding', credentialsId: credentialID, keyFileVariable: keyFileEnvVar, passphraseVariable: sshPassphraseEnvVar, usernameVariable: userEnvVar]]) {
            closure();
        }
    }
} 

Masking supported pattern matches of $sshKeyFileVariable or $sshPassphraseVariable
[Pipeline] {
[Pipeline] sshagent
[ssh-agent] Using credentials isv.xyz@ibm.com (xyz SSH RSA Private key for GitHub)
[ssh-agent] Looking for ssh-agent implementation...
[ssh-agent]   Exec ssh-agent (binary ssh-agent on a remote machine)
$ ssh-agent
SSH_AUTH_SOCK=/tmp/ssh-XXXXXXsbCdmR/agent.25141
SSH_AGENT_PID=25144
Running ssh-add (command line suppressed)
Identity added: /var/lib/jenkins/workspace/check_ssh_plugin@tmp/private_key_7785869356843689523.key (/var/lib/jenkins/workspace/check_ssh_plugin@tmp/private_key_7785869356843689523.key)
[ssh-agent] Started.
[Pipeline] {
[Pipeline] sshCommand
Using default settings: {fileTransfer=sftp, jschLog=false, retryWaitSec=0, timeoutSec=0, pty=false, authentications=[publickey, keyboard-interactive, password], agentForwarding=false, keepAliveSec=60, sudoPath=sudo, dryRun=false, encoding=UTF-8, retryCount=0, logging=slf4j, knownHosts=/var/lib/jenkins/.ssh/known_hosts, ignoreError=false, agent=false}
Using global settings: {}
Using per-service settings: {}
Using per-remote settings: {jschLog=true, timeoutSec=25, user=root, interaction=org.jenkinsci.plugins.sshsteps.SSHService$_defineRemote_closure1$_closure8$_closure9@72fb7e0d, dryRun=false, retryCount=2, logging=none, knownHosts=allowAnyHosts, ignoreError=false, identity=****}
Enabled JSch logging on Thread[org.jenkinsci.plugins.ssh.util.SSHStepExecution [#18],5,main]
Connecting to misnomer1.fyre.ibm.com[1.2.3.4:22] with {keepAliveSec=60, retryCount=2, retryWaitSec=0, knownHosts=allowAnyHosts, timeoutSec=25, agent=false, identity=****, authentications=[publickey, keyboard-interactive, password], user=root}
Host key checking is off. It may be vulnerable to man-in-the-middle attacks.
Using public key authentication for misnomer1.fyre.ibm.com[1.2.3.4:22]: ****
[jsch] Connecting to 1.2.3.4 port 22
[jsch] Connection established
[jsch] Remote version string: SSH-2.0-OpenSSH_8.7
[jsch] Local version string: SSH-2.0-JSCH-0.1.54
[jsch] CheckCiphers: aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,3des-ctr,arcfour,arcfour128,arcfour256
[jsch] CheckKexes: diffie-hellman-group14-sha1,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521
[jsch] CheckSignatures: ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
[jsch] SSH_MSG_KEXINIT sent
[jsch] SSH_MSG_KEXINIT received
[jsch] kex: server: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512
[jsch] kex: server: rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
[jsch] kex: server: aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr
[jsch] kex: server: aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr
[jsch] kex: server: hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha1,umac-128@openssh.com,hmac-sha2-512
[jsch] kex: server: hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha1,umac-128@openssh.com,hmac-sha2-512
[jsch] kex: server: none,zlib@openssh.com
[jsch] kex: server: none,zlib@openssh.com
[jsch] kex: server: 
[jsch] kex: server: 
[jsch] kex: client: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
[jsch] kex: client: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
[jsch] kex: client: aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc,aes192-ctr,aes192-cbc,aes256-ctr,aes256-cbc
[jsch] kex: client: aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc,aes192-ctr,aes192-cbc,aes256-ctr,aes256-cbc
[jsch] kex: client: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
[jsch] kex: client: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
[jsch] kex: client: none
[jsch] kex: client: none
[jsch] kex: client: 
[jsch] kex: client: 
[jsch] kex: server->client aes128-ctr hmac-sha1 none
[jsch] kex: client->server aes128-ctr hmac-sha1 none
[jsch] SSH_MSG_KEX_ECDH_INIT sent
[jsch] expecting SSH_MSG_KEX_ECDH_REPLY
[jsch] Permanently added '1.2.3.4' (ECDSA) to the list of known hosts.
[jsch] SSH_MSG_NEWKEYS sent
[jsch] SSH_MSG_NEWKEYS received
[jsch] SSH_MSG_SERVICE_REQUEST sent
[jsch] SSH_MSG_SERVICE_ACCEPT received
[jsch] Authentications that can continue: publickey,keyboard-interactive,password
[jsch] Next authentication method: publickey
[jsch] Authentications that can continue: password
[jsch] Next authentication method: password
[jsch] Disconnecting from 1.2.3.4 port 22
Retrying: com.jcraft.jsch.JSchException: Auth fail
Using public key authentication for misnomer1.fyre.ibm.com[1.2.3.4:22]: ****
[jsch] Connecting to 1.2.3.4 port 22
[jsch] Connection established
[jsch] Remote version string: SSH-2.0-OpenSSH_8.7
[jsch] Local version string: SSH-2.0-JSCH-0.1.54
[jsch] CheckCiphers: aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,3des-ctr,arcfour,arcfour128,arcfour256
[jsch] CheckKexes: diffie-hellman-group14-sha1,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521
[jsch] CheckSignatures: ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
[jsch] SSH_MSG_KEXINIT sent
[jsch] SSH_MSG_KEXINIT received
[jsch] kex: server: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512
[jsch] kex: server: rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
[jsch] kex: server: aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr
[jsch] kex: server: aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr
[jsch] kex: server: hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha1,umac-128@openssh.com,hmac-sha2-512
[jsch] kex: server: hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha1,umac-128@openssh.com,hmac-sha2-512
[jsch] kex: server: none,zlib@openssh.com
[jsch] kex: server: none,zlib@openssh.com
[jsch] kex: server: 
[jsch] kex: server: 
[jsch] kex: client: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
[jsch] kex: client: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
[jsch] kex: client: aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc,aes192-ctr,aes192-cbc,aes256-ctr,aes256-cbc
[jsch] kex: client: aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc,aes192-ctr,aes192-cbc,aes256-ctr,aes256-cbc
[jsch] kex: client: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
[jsch] kex: client: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
[jsch] kex: client: none
[jsch] kex: client: none
[jsch] kex: client: 
[jsch] kex: client: 
[jsch] kex: server->client aes128-ctr hmac-sha1 none
[jsch] kex: client->server aes128-ctr hmac-sha1 none
[jsch] SSH_MSG_KEX_ECDH_INIT sent
[jsch] expecting SSH_MSG_KEX_ECDH_REPLY
[jsch] Permanently added '1.2.3.4' (ECDSA) to the list of known hosts.
[jsch] SSH_MSG_NEWKEYS sent
[jsch] SSH_MSG_NEWKEYS received
[jsch] SSH_MSG_SERVICE_REQUEST sent
[jsch] SSH_MSG_SERVICE_ACCEPT received
[jsch] Authentications that can continue: publickey,keyboard-interactive,password
[jsch] Next authentication method: publickey
[jsch] Authentications that can continue: password
[jsch] Next authentication method: password
[jsch] Disconnecting from 1.2.3.4 port 22
Retrying: com.jcraft.jsch.JSchException: Auth fail
Using public key authentication for misnomer1.fyre.ibm.com[1.2.3.4:22]: ****
[jsch] Connecting to 1.2.3.4 port 22
[jsch] Connection established
[jsch] Remote version string: SSH-2.0-OpenSSH_8.7
[jsch] Local version string: SSH-2.0-JSCH-0.1.54
[jsch] CheckCiphers: aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,3des-ctr,arcfour,arcfour128,arcfour256
[jsch] CheckKexes: diffie-hellman-group14-sha1,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521
[jsch] CheckSignatures: ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
[jsch] SSH_MSG_KEXINIT sent
[jsch] SSH_MSG_KEXINIT received
[jsch] kex: server: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512
[jsch] kex: server: rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
[jsch] kex: server: aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr
[jsch] kex: server: aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr
[jsch] kex: server: hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha1,umac-128@openssh.com,hmac-sha2-512
[jsch] kex: server: hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha1,umac-128@openssh.com,hmac-sha2-512
[jsch] kex: server: none,zlib@openssh.com
[jsch] kex: server: none,zlib@openssh.com
[jsch] kex: server: 
[jsch] kex: server: 
[jsch] kex: client: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
[jsch] kex: client: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
[jsch] kex: client: aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc,aes192-ctr,aes192-cbc,aes256-ctr,aes256-cbc
[jsch] kex: client: aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc,aes192-ctr,aes192-cbc,aes256-ctr,aes256-cbc
[jsch] kex: client: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
[jsch] kex: client: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
[jsch] kex: client: none
[jsch] kex: client: none
[jsch] kex: client: 
[jsch] kex: client: 
[jsch] kex: server->client aes128-ctr hmac-sha1 none
[jsch] kex: client->server aes128-ctr hmac-sha1 none
[jsch] SSH_MSG_KEX_ECDH_INIT sent
[jsch] expecting SSH_MSG_KEX_ECDH_REPLY
[jsch] Permanently added '1.2.3.4' (ECDSA) to the list of known hosts.
[jsch] SSH_MSG_NEWKEYS sent
[jsch] SSH_MSG_NEWKEYS received
[jsch] SSH_MSG_SERVICE_REQUEST sent
[jsch] SSH_MSG_SERVICE_ACCEPT received
[jsch] Authentications that can continue: publickey,keyboard-interactive,password
[jsch] Next authentication method: publickey
[jsch] Authentications that can continue: password
[jsch] Next authentication method: password
[jsch] Disconnecting from 1.2.3.4 port 22
Closing connections: []
[Pipeline] }
$ ssh-agent -k
unset SSH_AUTH_SOCK;
unset SSH_AGENT_PID;
echo Agent pid 25144 killed;
[ssh-agent] Stopped.
[Pipeline] // sshagent
[Pipeline] }
[Pipeline] // withCredentials
[Pipeline] }
[Pipeline] // script
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
Also:   org.jenkinsci.plugins.workflow.actions.ErrorAction$ErrorId: fe5dbbbe-9fdf-4803-af9e-644a265cb848
com.jcraft.jsch.JSchException: Auth fail
	at com.jcraft.jsch.Session.connect(Session.java:519)
	at com.jcraft.jsch.Session.connect(Session.java:183)
	at com.jcraft.jsch.Session$connect$1.call(Unknown Source)
	at org.hidetake.groovy.ssh.connection.ConnectionManager.connectInternal(ConnectionManager.groovy:107)
	at jdk.internal.reflect.GeneratedMethodAccessor569.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:98)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
	at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:352)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1034)
	at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:68)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:193)
	at org.hidetake.groovy.ssh.connection.ConnectionManager$_connectInternal_closure1.doCall(ConnectionManager.groovy:85)
	at org.hidetake.groovy.ssh.connection.ConnectionManager$_connectInternal_closure1.doCall(ConnectionManager.groovy)
	at jdk.internal.reflect.GeneratedMethodAccessor568.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:98)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
	at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:264)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1034)
	at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:41)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120)
	at org.hidetake.groovy.ssh.util.Utility.retry(Utility.groovy:52)
	at org.hidetake.groovy.ssh.util.Utility$retry.callStatic(Unknown Source)
	at org.hidetake.groovy.ssh.util.Utility.retry(Utility.groovy:49)
	at org.hidetake.groovy.ssh.util.Utility$retry.callStatic(Unknown Source)
	at org.hidetake.groovy.ssh.util.Utility.retry(Utility.groovy:49)
	at org.hidetake.groovy.ssh.util.Utility$retry.callStatic(Unknown Source)
	at org.hidetake.groovy.ssh.connection.ConnectionManager.connectInternal(ConnectionManager.groovy:83)
	at org.hidetake.groovy.ssh.connection.ConnectionManager.connectInternal(ConnectionManager.groovy)
	at jdk.internal.reflect.GeneratedMethodAccessor931.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:210)
	at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:59)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:169)
	at org.hidetake.groovy.ssh.connection.ConnectionManager.connect(ConnectionManager.groovy:59)
	at org.hidetake.groovy.ssh.connection.ConnectionManager$connect.call(Unknown Source)
	at org.hidetake.groovy.ssh.session.SessionTask.wetRun(SessionTask.groovy:61)
	at org.hidetake.groovy.ssh.session.SessionTask.call(SessionTask.groovy:48)
	at java_util_concurrent_Callable$call.call(Unknown Source)
	at org.hidetake.groovy.ssh.core.Service.run(Service.groovy:81)
	at org.hidetake.groovy.ssh.core.Service$run$0.call(Unknown Source)
	at org.jenkinsci.plugins.sshsteps.SSHService.executeCommand(SSHService.groovy:177)
	at org.jenkinsci.plugins.sshsteps.steps.CommandStep$Execution$CommandCallable.execute(CommandStep.java:84)
	at org.jenkinsci.plugins.sshsteps.util.SSHMasterToSlaveCallable.call(SSHMasterToSlaveCallable.java:32)
	at hudson.remoting.LocalChannel.call(LocalChannel.java:47)
	at org.jenkinsci.plugins.sshsteps.steps.CommandStep$Execution.run(CommandStep.java:72)
	at org.jenkinsci.plugins.sshsteps.util.SSHStepExecution.lambda$start$0(SSHStepExecution.java:84)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:829)
Finished: FAILURE