Slave cannot be started after jenkinsmaster upgrade

Slave cannot be started after jenkinsmaster upgrade

After the master is upgraded to the latest war package, more than 10 slave instances cannot be started.

Distributed Computing in the big data department cannot run.

The war package of the previous version cannot be recovered urgently. The latest version of the war package cannot be downloaded after restart.

Finally google, in https://groups.google.com/forum! In topic/jenkinsci-users/HgWWqwaR07w, a bug was found in July 2013.

 

Hi, Just upgraded Jenkins to pickup some bug fixes (disappearing job log).Rekey process is running in the background. Is it not done yet and causing this?Every single slave failed to launch with this error:[10/28/13 16:47:39] [SSH] Opening SSH connection to batvm06.perf.lab.tripwire.com:22.ERROR: Unexpected error in launching a slave. This is probably a bug in Jenkins.java.lang.NullPointerExceptionat hudson.plugins.sshslaves.SSHLauncher.pemKeyEquals(SSHLauncher.java:471)at hudson.plugins.sshslaves.SSHLauncher.access$000(SSHLauncher.java:120)at hudson.plugins.sshslaves.SSHLauncher$1.matches(SSHLauncher.java:449)at com.cloudbees.plugins.credentials.matchers.AllOfMatcher.matches(AllOfMatcher.java:63)at com.cloudbees.plugins.credentials.CredentialsMatchers.firstOrDefault(CredentialsMatchers.java:356)at com.cloudbees.plugins.credentials.CredentialsMatchers.firstOrNull(CredentialsMatchers.java:374)at hudson.plugins.sshslaves.SSHLauncher.retrieveExistingCredentials(SSHLauncher.java:436)at hudson.plugins.sshslaves.SSHLauncher.upgrade(SSHLauncher.java:404)at hudson.plugins.sshslaves.SSHLauncher.getCredentials(SSHLauncher.java:389)at hudson.plugins.sshslaves.SSHLauncher.openConnection(SSHLauncher.java:1044)at hudson.plugins.sshslaves.SSHLauncher.launch(SSHLauncher.java:588)at hudson.slaves.SlaveComputer$1.call(SlaveComputer.java:230)at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)at java.util.concurrent.FutureTask.run(FutureTask.java:138)at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)at java.lang.Thread.run(Thread.java:662)[10/28/13 16:47:39] [SSH] Connection closed.