SSHLauncher{host='jenkins-agent-xxx16.infra.company.com', port=22, credentialsId='jenkins-xxx-id', jvmOptions='', javaPath='', prefixStartSlaveCmd='', suffixStartSlaveCmd='', launchTimeoutSeconds=60, maxNumRetries=10, retryWaitTime=15, sshHostKeyVerificationStrategy=hudson.plugins.sshslaves.verifiers.NonVerifyingKeyVerificationStrategy, tcpNoDelay=true, trackCredentials=true}
[12/05/22 15:10:59] [SSH] Opening SSH connection to jenkins-agent-xxx16.infra.company.com:22.
...
[12/05/22 15:11:00] [SSH] Authentication successful.
[12/05/22 15:11:00] [SSH] The remote user's environment is:
BASH=/usr/bin/bash
BASHOPTS=cmdhist:complete_fullquote:extquote:force_fignore:hostcomplete:interactive_comments:progcomp:promptvars:sourcepath
BASH_ALIASES=()
BASH_ARGC=()
BASH_ARGV=()
BASH_CMDS=()
BASH_EXECUTION_STRING=set
BASH_LINENO=()
BASH_SOURCE=()
BASH_VERSINFO=([0]="4" [1]="4" [2]="20" [3]="1" [4]="release" [5]="x86_64-redhat-linux-gnu")
BASH_VERSION='4.4.20(1)-release'
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1003/bus
DIRSTACK=()
EUID=1003
GROUPS=()
HOME=/home/jenkins
HOSTNAME=jenkins-agent-xxx16
HOSTTYPE=x86_64
IFS=$' \t\n'
JAVA_HOME=/usr/java/latest
LANG=en_US.UTF-8
LOGNAME=jenkins
M2_HOME=/usr/share/apache-maven
MACHTYPE=x86_64-redhat-linux-gnu
OPTERR=1
OPTIND=1
OSTYPE=linux-gnu
PATH=/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/usr/share/apache-maven/bin
PIPESTATUS=([0]="0")
PPID=3867889
PS4='+ '
PWD=/home/jenkins
SHELL=/bin/bash
SHELLOPTS=braceexpand:hashall:interactive-comments
SHLVL=1
SSH_CLIENT='10.87.X.Y 46950 22'
SSH_CONNECTION='10.87.X.Y 46950 10.87.A.B 22'
TERM=dumb
UID=1003
USER=jenkins
XDG_RUNTIME_DIR=/run/user/1003
XDG_SESSION_ID=8612
_=M2_HOME
Checking Java version in the PATH
openjdk version "17.0.5" 2022-10-18 LTS
OpenJDK Runtime Environment (Red_Hat-17.0.5.0.8-2.el8_6) (build 17.0.5+8-LTS)
OpenJDK 64-Bit Server VM (Red_Hat-17.0.5.0.8-2.el8_6) (build 17.0.5+8-LTS, mixed mode, sharing)
[12/05/22 15:11:00] [SSH] Checking java version of /opt/jenkins/jdk/bin/java
Couldn't figure out the Java version of /opt/jenkins/jdk/bin/java
bash: /opt/jenkins/jdk/bin/java: No such file or directory
[12/05/22 15:11:00] [SSH] Checking java version of java
[12/05/22 15:11:00] [SSH] java -version returned 17.0.5.
[12/05/22 15:11:00] [SSH] Starting sftp client.
[12/05/22 15:11:00] [SSH] Copying latest remoting.jar...
Source agent hash is 8D575C4C8219E6AB2039295EC545C6C3. Installed agent hash is 8D575C4C8219E6AB2039295EC545C6C3
Verified agent jar. No update is necessary.
Expanded the channel window size to 4MB
[12/05/22 15:11:01] [SSH] Starting agent process: cd "/opt/jenkins" && java -jar remoting.jar -workDir /opt/jenkins -jar-cache /opt/jenkins/remoting/jarCache
Dec 05, 2022 3:11:01 PM org.jenkinsci.remoting.engine.WorkDirManager initializeWorkDir
INFO: Using /opt/jenkins/remoting as a remoting work directory
Dec 05, 2022 3:11:01 PM org.jenkinsci.remoting.engine.WorkDirManager setupLogging
INFO: Both error and output logs will be printed to /opt/jenkins/remoting
<===[JENKINS REMOTING CAPACITY]===>channel started
Remoting version: 3044.vb_940a_a_e4f72e
Launcher: SSHLauncher
Communication Protocol: Standard in/out
This is a Unix agent
ERROR: Unexpected error in launching an agent. This is probably a bug in Jenkins
Also: hudson.remoting.Channel$CallSiteStackTrace: Remote call to jenkins-agent-xxx16.infra.company.com
at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1784)
at hudson.remoting.UserRequest$ExceptionResponse.retrieve(UserRequest.java:356)
at hudson.remoting.Channel.call(Channel.java:1000)
at hudson.FilePath.act(FilePath.java:1277)
at org.jenkinsci.plugins.envinject.EnvInjectComputerListener.onOnline(EnvInjectComputerListener.java:144)
at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:748)
at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:438)
at hudson.plugins.sshslaves.SSHLauncher.startAgent(SSHLauncher.java:641)
at hudson.plugins.sshslaves.SSHLauncher.lambda$launch$0(SSHLauncher.java:458)
java.lang.reflect.InaccessibleObjectException: Unable to make private native java.lang.reflect.Field[] java.lang.Class.getDeclaredFields0(boolean) accessible: module java.base does not "opens java.lang" to unnamed module @7894ef17
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199)
at java.base/java.lang.reflect.Method.setAccessible(Method.java:193)
at org.jenkinsci.plugins.envinject.service.EnvInjectMasterEnvVarsSetter.getModifiers(EnvInjectMasterEnvVarsSetter.java:29)
at org.jenkinsci.plugins.envinject.service.EnvInjectMasterEnvVarsSetter.call(EnvInjectMasterEnvVarsSetter.java:55)
at org.jenkinsci.plugins.envinject.service.EnvInjectMasterEnvVarsSetter.call(EnvInjectMasterEnvVarsSetter.java:19)
at hudson.remoting.UserRequest.perform(UserRequest.java:211)
at hudson.remoting.UserRequest.perform(UserRequest.java:54)
at hudson.remoting.Request$2.run(Request.java:376)
at hudson.remoting.InterceptingExecutorService.lambda$wrap$0(InterceptingExecutorService.java:78)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)
Agent successfully connected and online
Bug
Minor
Basil Crow
added a comment - Duplicates JENKINS-60891 .
We have the same errors in agent logs since we moved to Java 17 recentöy.
It connects in the end, so maybe not a serious issue.
Slightly redacted log:
SSHLauncher{host='jenkins-agent-xxx16.infra.company.com', port=22, credentialsId='jenkins-xxx-id', jvmOptions='', javaPath='', prefixStartSlaveCmd='', suffixStartSlaveCmd='', launchTimeoutSeconds=60, maxNumRetries=10, retryWaitTime=15, sshHostKeyVerificationStrategy=hudson.plugins.sshslaves.verifiers.NonVerifyingKeyVerificationStrategy, tcpNoDelay=true, trackCredentials=true} [12/05/22 15:10:59] [SSH] Opening SSH connection to jenkins-agent-xxx16.infra.company.com:22. ... [12/05/22 15:11:00] [SSH] Authentication successful. [12/05/22 15:11:00] [SSH] The remote user's environment is: BASH=/usr/bin/bash BASHOPTS=cmdhist:complete_fullquote:extquote:force_fignore:hostcomplete:interactive_comments:progcomp:promptvars:sourcepath BASH_ALIASES=() BASH_ARGC=() BASH_ARGV=() BASH_CMDS=() BASH_EXECUTION_STRING=set BASH_LINENO=() BASH_SOURCE=() BASH_VERSINFO=([0]="4" [1]="4" [2]="20" [3]="1" [4]="release" [5]="x86_64-redhat-linux-gnu") BASH_VERSION='4.4.20(1)-release' DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1003/bus DIRSTACK=() EUID=1003 GROUPS=() HOME=/home/jenkins HOSTNAME=jenkins-agent-xxx16 HOSTTYPE=x86_64 IFS=$' \t\n' JAVA_HOME=/usr/java/latest LANG=en_US.UTF-8 LOGNAME=jenkins M2_HOME=/usr/share/apache-maven MACHTYPE=x86_64-redhat-linux-gnu OPTERR=1 OPTIND=1 OSTYPE=linux-gnu PATH=/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/usr/share/apache-maven/bin PIPESTATUS=([0]="0") PPID=3867889 PS4='+ ' PWD=/home/jenkins SHELL=/bin/bash SHELLOPTS=braceexpand:hashall:interactive-comments SHLVL=1 SSH_CLIENT='10.87.X.Y 46950 22' SSH_CONNECTION='10.87.X.Y 46950 10.87.A.B 22' TERM=dumb UID=1003 USER=jenkins XDG_RUNTIME_DIR=/run/user/1003 XDG_SESSION_ID=8612 _=M2_HOME Checking Java version in the PATH openjdk version "17.0.5" 2022-10-18 LTS OpenJDK Runtime Environment (Red_Hat-17.0.5.0.8-2.el8_6) (build 17.0.5+8-LTS) OpenJDK 64-Bit Server VM (Red_Hat-17.0.5.0.8-2.el8_6) (build 17.0.5+8-LTS, mixed mode, sharing) [12/05/22 15:11:00] [SSH] Checking java version of /opt/jenkins/jdk/bin/java Couldn't figure out the Java version of /opt/jenkins/jdk/bin/java bash: /opt/jenkins/jdk/bin/java: No such file or directory [12/05/22 15:11:00] [SSH] Checking java version of java [12/05/22 15:11:00] [SSH] java -version returned 17.0.5. [12/05/22 15:11:00] [SSH] Starting sftp client. [12/05/22 15:11:00] [SSH] Copying latest remoting.jar... Source agent hash is 8D575C4C8219E6AB2039295EC545C6C3. Installed agent hash is 8D575C4C8219E6AB2039295EC545C6C3 Verified agent jar. No update is necessary. Expanded the channel window size to 4MB [12/05/22 15:11:01] [SSH] Starting agent process: cd "/opt/jenkins" && java -jar remoting.jar -workDir /opt/jenkins -jar-cache /opt/jenkins/remoting/jarCache Dec 05, 2022 3:11:01 PM org.jenkinsci.remoting.engine.WorkDirManager initializeWorkDir INFO: Using /opt/jenkins/remoting as a remoting work directory Dec 05, 2022 3:11:01 PM org.jenkinsci.remoting.engine.WorkDirManager setupLogging INFO: Both error and output logs will be printed to /opt/jenkins/remoting <===[JENKINS REMOTING CAPACITY]===>channel started Remoting version: 3044.vb_940a_a_e4f72e Launcher: SSHLauncher Communication Protocol: Standard in/out This is a Unix agent ERROR: Unexpected error in launching an agent. This is probably a bug in Jenkins Also: hudson.remoting.Channel$CallSiteStackTrace: Remote call to jenkins-agent-xxx16.infra.company.com at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1784) at hudson.remoting.UserRequest$ExceptionResponse.retrieve(UserRequest.java:356) at hudson.remoting.Channel.call(Channel.java:1000) at hudson.FilePath.act(FilePath.java:1277) at org.jenkinsci.plugins.envinject.EnvInjectComputerListener.onOnline(EnvInjectComputerListener.java:144) at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:748) at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:438) at hudson.plugins.sshslaves.SSHLauncher.startAgent(SSHLauncher.java:641) at hudson.plugins.sshslaves.SSHLauncher.lambda$launch$0(SSHLauncher.java:458) java.lang.reflect.InaccessibleObjectException: Unable to make private native java.lang.reflect.Field[] java.lang.Class.getDeclaredFields0(boolean) accessible: module java.base does not "opens java.lang" to unnamed module @7894ef17 at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354) at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297) at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199) at java.base/java.lang.reflect.Method.setAccessible(Method.java:193) at org.jenkinsci.plugins.envinject.service.EnvInjectMasterEnvVarsSetter.getModifiers(EnvInjectMasterEnvVarsSetter.java:29) at org.jenkinsci.plugins.envinject.service.EnvInjectMasterEnvVarsSetter.call(EnvInjectMasterEnvVarsSetter.java:55) at org.jenkinsci.plugins.envinject.service.EnvInjectMasterEnvVarsSetter.call(EnvInjectMasterEnvVarsSetter.java:19) at hudson.remoting.UserRequest.perform(UserRequest.java:211) at hudson.remoting.UserRequest.perform(UserRequest.java:54) at hudson.remoting.Request$2.run(Request.java:376) at hudson.remoting.InterceptingExecutorService.lambda$wrap$0(InterceptingExecutorService.java:78) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) at java.base/java.lang.Thread.run(Thread.java:833) Agent successfully connected and onlineBut we do have a problem since migration with the agents sometimes disconnecting: