Details
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Bug
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Status: Open (View Workflow)
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Critical
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Resolution: Unresolved
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Jenkins is running on a RHEL 7
Jenkins Version is 2.180
Description
When I was indexing my jobs today I got an ClassCastException, the result of this mistake is hat my MultiBranch Pipeline job cannot find any branches and therefore the folder stays empty. This is a critical issue for me. I would appreciate any help. Here is my error message:
ERROR: [Tue Jun 11 18:16:54 CEST 2019] Could not fetch branches from source 78aad773-0322-49fb-99da-95df2966fe5b java.lang.ClassCastException: [[J cannot be cast to org.mapdb.BTreeMap$BNode at org.mapdb.BTreeMap.put2(BTreeMap.java:663) at org.mapdb.BTreeMap.put(BTreeMap.java:643) at org.mapdb.DB.catPut(DB.java:105) at org.mapdb.DB.createHashMap(DB.java:443) at org.mapdb.DB$HTreeMapMaker.make(DB.java:216) at org.mapdb.DB.getHashMap(DB.java:356) at org.mapdb.DB.getHashMap(DB.java:329) at jenkins.scm.impl.subversion.SVNRepositoryView.<init>(SVNRepositoryView.java:115) at jenkins.scm.impl.subversion.SubversionSCMSource.openSession(SubversionSCMSource.java:336) at jenkins.scm.impl.subversion.SubversionSCMSource.retrieve(SubversionSCMSource.java:240) at jenkins.scm.api.SCMSource._retrieve(SCMSource.java:373) at jenkins.scm.api.SCMSource.fetch(SCMSource.java:283) at jenkins.branch.MultiBranchProject.computeChildren(MultiBranchProject.java:634) at com.cloudbees.hudson.plugins.folder.computed.ComputedFolder.updateChildren(ComputedFolder.java:277) at com.cloudbees.hudson.plugins.folder.computed.FolderComputation.run(FolderComputation.java:164) at jenkins.branch.MultiBranchProject$BranchIndexing.run(MultiBranchProject.java:1025) at hudson.model.ResourceController.execute(ResourceController.java:97) at hudson.model.Executor.run(Executor.java:429) [Tue Jun 11 18:16:54 CEST 2019] Finished branch indexing. Indexing took 74 ms FATAL: Failed to recompute children of truemdmBuildReports » test java.lang.ClassCastException: [[J cannot be cast to org.mapdb.BTreeMap$BNode at org.mapdb.BTreeMap.put2(BTreeMap.java:663) at org.mapdb.BTreeMap.put(BTreeMap.java:643) at org.mapdb.DB.catPut(DB.java:105) at org.mapdb.DB.createHashMap(DB.java:443) at org.mapdb.DB$HTreeMapMaker.make(DB.java:216) at org.mapdb.DB.getHashMap(DB.java:356) at org.mapdb.DB.getHashMap(DB.java:329) at jenkins.scm.impl.subversion.SVNRepositoryView.<init>(SVNRepositoryView.java:115) at jenkins.scm.impl.subversion.SubversionSCMSource.openSession(SubversionSCMSource.java:336) at jenkins.scm.impl.subversion.SubversionSCMSource.retrieve(SubversionSCMSource.java:240) at jenkins.scm.api.SCMSource._retrieve(SCMSource.java:373) at jenkins.scm.api.SCMSource.fetch(SCMSource.java:283) at jenkins.branch.MultiBranchProject.computeChildren(MultiBranchProject.java:634) at com.cloudbees.hudson.plugins.folder.computed.ComputedFolder.updateChildren(ComputedFolder.java:277) at com.cloudbees.hudson.plugins.folder.computed.FolderComputation.run(FolderComputation.java:164) at jenkins.branch.MultiBranchProject$BranchIndexing.run(MultiBranchProject.java:1025) at hudson.model.ResourceController.execute(ResourceController.java:97) at hudson.model.Executor.run(Executor.java:429) Finished: FAILURE
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Pete Shanahan
added a comment - I hit this problem with our jenkins master and thought I was going to have to dig into some development.
From what I can tell, the issue is that the cache for svn is outdated/corrupted and this is where the exception comes from.
I went to my jenkins master's data location, and then into the cache directory.
Then I did an rm of all files looking like svn-02b3b8c6-d4e4-0310-943f-b71371c1e98f.db*
- although on your system, I guess they would look like: svn-78aad773-0322-49fb-99da-95df2966fe5b.db*
Once I removed these files, and clicked on the 'rescan' everything was working again.
This is based on the exception I was getting indicating that the problem was at line: https://github.com/jenkinsci/subversion-plugin/blob/master/src/main/java/jenkins/scm/impl/subversion/SVNRepositoryView.java#L115
Hope this helps someone!
Pete Shanahan
added a comment - I hit this problem with our jenkins master and thought I was going to have to dig into some development.
From what I can tell, the issue is that the cache for svn is outdated/corrupted and this is where the exception comes from.
I went to my jenkins master's data location, and then into the cache directory.
Then I did an rm of all files looking like svn-02b3b8c6-d4e4-0310-943f-b71371c1e98f.db*
although on your system, I guess they would look like: svn-78aad773-0322-49fb-99da-95df2966fe5b.db*
Once I removed these files, and clicked on the 'rescan' everything was working again.
This is based on the exception I was getting indicating that the problem was at line: https://github.com/jenkinsci/subversion-plugin/blob/master/src/main/java/jenkins/scm/impl/subversion/SVNRepositoryView.java#L115
Hope this helps someone! 
Did you ever find a fix for this? Most (all but one) of my multibranch pipelines are failing with this error now, but I can't pinpoint what is different.