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Bug
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Resolution: Not A Defect
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Major
Hello there,
we facing an issue after updating our GitHub Enterprise Server to 3.4.1 yesterday.
We have about 100 Jenkins Instances - deployed as Pods in kubernetes - with the same basic configuration and plugins and one which has a special configuration, cause the organisation uses submodule, i will talk about this later.
The Problem appears only on this one special Instance and we can not locate why.
The Error appears during the repo-scan, while retrieving the hash of an open pull request.
Repo-Scan Log:
[...]
23 branches were processed
Checking pull-requests...
Getting remote pull requests...
Checking pull request #2693
'Jenkinsfile' found
ERROR: [Wed Apr 27 10:49:39 CEST 2022] Could not fetch branches from source org.jenkinsci.plugins.github_branch_source.GitHubSCMNavigator::https://github.mycompany.de/api/v3::<my-github-org>::<repo>
[Wed Apr 27 10:49:39 CEST 2022] Finished branch indexing. Indexing took 3.4 sec
FATAL: Error while retrieving pull request 2693 merge hash : org.kohsuke.github.HttpException:
Finished: FAILURE
> Organisation and Repo with dummy values replaced.
There is no further Stacktrace or Log this is the only information about the error we got. So we are completly stucked at the moment. And requesting some help, to understand whats happing.
The special Instance has two SSH-Agent-Slaves and a additional SCMTrait for Submodules. Normally the builds on our cloudbased Jenkins (we call it Leeroy 
) spawns a Pod where the artifacts will be build. The special Instance is only using the slaves.
May be another detail: The Repos in this organisation are mostly "private" and some of the repos has more than >6000 Commits. They are really large.
Can someone explain, whats happing in the step of retriving the pr-hash?
Some more details:
For the Auth between GitHub ES and Jenkins, we use an GitHub App with the following access:
> Read access to members, metadata, and pull requests
> Read and write access to checks, code, and commit statuses
> Repository access: All repositories
We configure our github-plugin during startup in a Groovy Script:
def scmNavigator = new GitHubSCMNavigator(githubApiUrl, organizationName, github_credential, github_credential) scmNavigator.setTraits([ new BranchDiscoveryTrait(true, true), // build ALL branches new OriginPullRequestDiscoveryTrait(1), // build PR-Merge on Pull Requests new ForkPullRequestDiscoveryTrait(1, new ForkPullRequestDiscoveryTrait.TrustPermission()), // only build PR-Merge of users with write access to the repository new jenkins.plugins.git.traits.LocalBranchTrait(), // check out target branch new jenkins.plugins.git.traits.GitLFSPullTrait(), // perform git lfs pull after clone new jenkins.plugins.git.traits.CleanAfterCheckoutTrait(), // perform clean after checkout new jenkins.plugins.git.traits.RefSpecsSCMSourceTrait( // add ref specs for HEAD and tags "+refs/heads/*:refs/remotes/@{remote}/*", "+refs/tags/*:refs/tags/*" ), new jenkins.scm.impl.trait.WildcardSCMSourceFilterTrait( config.init.GIT_REPO_INCLUDES ?: "*", config.init.GIT_REPO_EXCLUDES ?: "" ), new jenkins.scm.impl.trait.WildcardSCMHeadFilterTrait( config.init.GIT_BRANCH_INCLUDES ?: "*", config.init.GIT_BRANCH_EXCLUDES ?: "" ) ]); if(config.init.GIT_ADD_SUBMODULE_BEHAVIOUR != null && config.init.GIT_ADD_SUBMODULE_BEHAVIOUR != ''){ if(config.init.GIT_ADD_SUBMODULE_BEHAVIOUR == 'true'){ def scmTraits = scmNavigator.getTraits() as java.util.ArrayList scmTraits.add( new jenkins.plugins.git.traits.SubmoduleOptionTrait( // perform a submodule checkout within the normal scm checkout new hudson.plugins.git.extensions.impl.SubmoduleOption( false, true, false, '', 1, true ) ) ); scmNavigator.setTraits(scmTraits); } } job.getSCMNavigators().add(scmNavigator) def pruneDeadBranches = true def daysToKeep = 0 def numToKeep = 1 job.setOrphanedItemStrategy(new com.cloudbees.hudson.plugins.folder.computed.DefaultOrphanedItemStrategy(pruneDeadBranches, daysToKeep, numToKeep)) def projectFactory = new org.jenkinsci.plugins.workflow.multibranch.WorkflowMultiBranchProjectFactory() projectFactory.scriptPath = config.init.JENKINSFILE_NAME ?: 'Jenkinsfile' job.getProjectFactories().add(projectFactory) job.buildStrategies.add( new jenkins.branch.buildstrategies.basic.ChangeRequestBuildStrategyImpl(true) // ignore merge revision changes where the only difference is the target branch revision ) // scan repository now job.scheduleBuild2(0) // configure automatic branch build behaviour def automaticBranchBuilds = config.init.ENABLE_AUTOMATIC_BRANCH_BUILDS logger.info("automatic branch builds: '${automaticBranchBuilds}'") if (automaticBranchBuilds == null || automaticBranchBuilds.toString().trim() == 'false') { logger.info("automatic branch builds are DISABLED") } else if(automaticBranchBuilds.toString().trim() == 'true') { logger.info("automatic branch builds ENABLED for ALL BRANCHES") job.buildStrategies.add(new jenkins.branch.buildstrategies.basic.BranchBuildStrategyImpl()) } else { logger.info("automatic branch builds ENABLED for branch pattern ${automaticBranchBuilds}") job.buildStrategies.add( new jenkins.branch.buildstrategies.basic.NamedBranchBuildStrategyImpl([ new jenkins.branch.buildstrategies.basic.NamedBranchBuildStrategyImpl.RegexNameFilter( automaticBranchBuilds, true ) ] ) ) }
Jenkins Version: 2.334
github-branch-source-plugin Version: 2.11.4
