Issue

• Agents sometimes fails to launch due to LinkageErrors like the following:

Caused by: java.lang.LinkageError: Failed to load jenkins.util.SystemProperties
     at hudson.remoting.RemoteClassLoader.loadClassFile(RemoteClassLoader.java:385)
     at hudson.remoting.RemoteClassLoader.findClass(RemoteClassLoader.java:293)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
     at hudson.FilePath.<clinit>(FilePath.java:2363)
     [...]
 Caused by: java.lang.NoClassDefFoundError: javax/servlet/ServletContextListener
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:642)
     at hudson.remoting.RemoteClassLoader.loadClassFile(RemoteClassLoader.java:381)
     at hudson.remoting.RemoteClassLoader.findClass(RemoteClassLoader.java:293)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
     at hudson.FilePath.<clinit>(FilePath.java:2363)
     [...]
 Caused by: java.lang.ClassNotFoundException: javax.servlet.ServletContextListener

Environment

• CloudBees Core on modern cloud platforms - Managed Master
• CloudBees Core on modern cloud platforms - Operations Center
• CloudBees Core on traditional platforms - Client Master
• CloudBees Core on traditional platforms - Operations Center
• CloudBees Jenkins Enterprise
• CloudBees Jenkins Enterprise - Managed Master
• CloudBees Jenkins Enterprise - Operations Center
• CloudBees Jenkins Team
• CloudBees Jenkins Platform - Client Master
• CloudBees Jenkins Platform - Operations Center
• Jenkins LTS < 2.107.3

Related Issue(s)

• JENKINS-39669
• JENKINS-46386
• JENKINS-47324

Resolution

This is caused by a known issue JENKINS-46386 fixed in Jenkins LTS 2.107.3 ( 2.113 of Jenkins OSS).

Solution

The solution is to upgrade core to version 2.107.3 or later.