Hello Everyone,

We recently upgraded the Jenkins version from 2.401.3 to 2.479.3 (containerized) which went smooth and updated all the plugins, since then the multibranch pipelines are not able to scan new branches, if we create a new multibranch pipeline then it is able to scan all branches for the first time and again it is not able to scan all of them.

Below is from output

Blow is from the system logs

Feb 26, 2025 5:47:36 PM SEVERE hudson.model.Executor finish1
Executor threw an exception java.lang.ClassNotFoundException: org.objectweb.asm.ClassWriter Caused: java.lang.NoClassDefFoundError: org/objectweb/asm/ClassWriter at PluginClassLoader for scm-api//jenkins.scm.api.SCMHeadMixinEqualityGenerator.create(SCMHeadMixinEqualityGenerator.java:234) at PluginClassLoader for scm-api//jenkins.scm.api.SCMHeadMixinEqualityGenerator.getOrCreate(SCMHeadMixinEqualityGenerator.java:152) at PluginClassLoader for scm-api//jenkins.scm.api.SCMHead.equals(SCMHead.java:191) at PluginClassLoader for branch-api//jenkins.branch.Branch.equals(Branch.java:279) at PluginClassLoader for branch-api//jenkins.branch.MultiBranchProject$SCMHeadObserverImpl.observeExisting(MultiBranchProject.java:2033) at PluginClassLoader for branch-api//jenkins.branch.MultiBranchProject$SCMHeadObserverImpl.observe(MultiBranchProject.java:2021) at PluginClassLoader for scm-api//jenkins.scm.api.trait.SCMSourceRequest.process(SCMSourceRequest.java:357) at PluginClassLoader for git//jenkins.plugins.git.AbstractGitSCMSource$8.discoverBranches(AbstractGitSCMSource.java:708) at PluginClassLoader for git//jenkins.plugins.git.AbstractGitSCMSource$8.run(AbstractGitSCMSource.java:612) at PluginClassLoader for git//jenkins.plugins.git.AbstractGitSCMSource$8.run(AbstractGitSCMSource.java:591) at PluginClassLoader for git//jenkins.plugins.git.AbstractGitSCMSource.doRetrieve(AbstractGitSCMSource.java:397) at PluginClassLoader for git//jenkins.plugins.git.AbstractGitSCMSource.doRetrieve(AbstractGitSCMSource.java:351) at PluginClassLoader for git//jenkins.plugins.git.AbstractGitSCMSource.retrieve(AbstractGitSCMSource.java:591) at PluginClassLoader for scm-api//jenkins.scm.api.SCMSource._retrieve(SCMSource.java:372) at PluginClassLoader for scm-api//jenkins.scm.api.SCMSource.fetch(SCMSource.java:282) at PluginClassLoader for branch-api//jenkins.branch.MultiBranchProject.computeChildren(MultiBranchProject.java:654) at PluginClassLoader for cloudbees-folder//com.cloudbees.hudson.plugins.folder.computed.ComputedFolder.updateChildren(ComputedFolder.java:269) at PluginClassLoader for cloudbees-folder//com.cloudbees.hudson.plugins.folder.computed.FolderComputation.run(FolderComputation.java:167) at PluginClassLoader for branch-api//jenkins.branch.MultiBranchProject$BranchIndexing.run(MultiBranchProject.java:1057) at hudson.model.ResourceController.execute(ResourceController.java:101) at hudson.model.Executor.run(Executor.java:445)

Below are the plugins versions

scm-api : 676.v886669a_199a_a_

branch-api :2.1128.v717130d4f816

git :

in additional to above, i have the following plugin which is deprecated

Not sure what causing this, can someone help me with this?