SSHLauncher{host='172.18.24.195', port=52631, credentialsId='InstanceIdentity', jvmOptions='', javaPath='', prefixStartSlaveCmd='', suffixStartSlaveCmd='', launchTimeoutSeconds=60, maxNumRetries=10, retryWaitTime=15, sshHostKeyVerificationStrategy=hudson.plugins.sshslaves.verifiers.NonVerifyingKeyVerificationStrategy, tcpNoDelay=true, trackCredentials=true} [07/01/21 09:22:58] [SSH] Opening SSH connection to 172.18.24.195:52631. [07/01/21 09:22:58] [SSH] WARNING: SSH Host Keys are not being verified. Man-in-the-middle attacks may be possible against this connection. [07/01/21 09:22:58] [SSH] Authentication successful. [07/01/21 09:22:58] [SSH] The remote user's environment is: BASH=/bin/bash BASHOPTS=checkwinsize:cmdhist:complete_fullquote:extquote:force_fignore:globasciiranges:hostcomplete:interactive_comments:progcomp:promptvars:sourcepath BASH_ALIASES=() BASH_ARGC=([0]="0") BASH_ARGV=() BASH_CMDS=() BASH_EXECUTION_STRING=set BASH_LINENO=() BASH_SOURCE=() BASH_VERSINFO=([0]="5" [1]="0" [2]="3" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu") BASH_VERSION='5.0.3(1)-release' DIRSTACK=() EUID=1000 GROUPS=() HOME=/home/jenkins HOSTNAME=a5eeef5a4102 HOSTTYPE=x86_64 IFS=$' \t\n' JAVA_HOME=/usr/local/openjdk-8 JAVA_VERSION=8u282 JENKINS_AGENT_HOME=/home/jenkins JENKINS_SLAVE_SSH_PUBKEY='ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA1iPm4AVgs04ZT/3B85Arie5QAX/B6TP4J4DU5FKULnCwV/oJjn3dUV9H17RxEuLDH9/k4dHBb6EsY+PyUnlnR3VCcCI8Hpg1SqLbzksBbeRvSNcKoBshrONvZzYVLdHQ/IJGsXAddtrKtJI/hKx028T72l4by1NcV2VduW82rPKhVimDbSpBoLZsEpb/Dfv6mdpxc9acP3LRto5aLnCpRpbEFUcFiy090cWfbijfWfyPSIbF3780KjkjgYWpa8S27FUUxfZ51bGw9ziq4KAJ6FGgceBAF6ffQdgbgJo/uSWslIj+adGVQFW5/Zo80lNxNlFxH0FewRThsVk2XpmfjQ== root@swpsci06' LOGNAME=jenkins MACHTYPE=x86_64-pc-linux-gnu MAIL=/var/mail/jenkins OPTERR=1 OPTIND=1 OSTYPE=linux-gnu PATH=/usr/local/bin:/usr/bin:/bin:/usr/games PIPESTATUS=([0]="0") PPID=24 PS4='+ ' PWD=/home/jenkins SHELL=/bin/bash SHELLOPTS=braceexpand:hashall:interactive-comments SHLVL=1 SSH_CLIENT='172.18.24.52 53028 22' SSH_CONNECTION='172.18.24.52 53028 172.17.0.12 22' TERM=dumb UID=1000 USER=jenkins _=']' ERROR: class io.jenkins.docker.connector.DockerComputerSSHConnector$DockerSSHLauncher is missing its descriptor java.lang.AssertionError: class io.jenkins.docker.connector.DockerComputerSSHConnector$DockerSSHLauncher is missing its descriptor at jenkins.model.Jenkins.getDescriptorOrDie(Jenkins.java:1598) at hudson.model.AbstractDescribableImpl.getDescriptor(AbstractDescribableImpl.java:42) at hudson.plugins.sshslaves.SSHLauncher.checkJavaIsInPath(SSHLauncher.java:529) at hudson.plugins.sshslaves.SSHLauncher.access$300(SSHLauncher.java:111) at hudson.plugins.sshslaves.SSHLauncher$1.call(SSHLauncher.java:449) at hudson.plugins.sshslaves.SSHLauncher$1.call(SSHLauncher.java:421) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) [07/01/21 09:22:58] Launch failed - cleaning up connection [07/01/21 09:22:58] [SSH] Connection closed.