I'm using File System SCM to provide Folder Libraries. The Folder Librarie had been configured not to populate the changelog of the build with the changes found in the folder library.

 

When not populating the changelog of the Job with the one of the Library File SCM creates a Null Pointer Exception:

 

Loading library branchLib@defaultVersion

FSSCM.checkout c:/ws/UFM6/RefactoringJenkinsJobs/work/Automation/Utils to c:\ws\BRANCH_RefactoringJenkinsJobs\Setup\work@libs\branchLib

New file: .classpath

<removed many more Lines of New Files>

New file: vars\sonar.groovy

 

java.lang.NullPointerException

                at java.io.FileOutputStream.<init>(Unknown Source)

                at java.io.FileOutputStream.<init>(Unknown Source)

                at hudson.plugins.filesystem_scm.ChangelogSet$XMLSerializer.save(ChangelogSet.java:121)

                at hudson.plugins.filesystem_scm.FSSCM.checkout(FSSCM.java:213)

                at org.jenkinsci.plugins.workflow.steps.scm.SCMStep.checkout(SCMStep.java:113)

                at org.jenkinsci.plugins.workflow.libs.SCMSourceRetriever.doRetrieve(SCMSourceRetriever.java:112)

                at org.jenkinsci.plugins.workflow.libs.SCMRetriever.retrieve(SCMRetriever.java:64)

                at org.jenkinsci.plugins.workflow.libs.LibraryAdder.retrieve(LibraryAdder.java:153)

                at org.jenkinsci.plugins.workflow.libs.LibraryAdder.add(LibraryAdder.java:134)

                at org.jenkinsci.plugins.workflow.libs.LibraryDecorator$1.call(LibraryDecorator.java:125)

                at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1065)

                at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:603)

                at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:581)

                at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:558)

                at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:298)

                at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:268)

                at groovy.lang.GroovyShell.parseClass(GroovyShell.java:688)

                at groovy.lang.GroovyShell.parse(GroovyShell.java:700)

                at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.doParse(CpsGroovyShell.java:129)

                at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.reparse(CpsGroovyShell.java:123)

                at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.parseScript(CpsFlowExecution.java:517)

                at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.start(CpsFlowExecution.java:480)

                at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:268)

                at hudson.model.ResourceController.execute(ResourceController.java:97)

                at hudson.model.Executor.run(Executor.java:429)

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:

WorkflowScript: Loading libraries failed

 

1 error

 

                at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:310)

                at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1085)

                at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:603)

                at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:581)

                at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:558)

                at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:298)

                at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:268)

                at groovy.lang.GroovyShell.parseClass(GroovyShell.java:688)

                at groovy.lang.GroovyShell.parse(GroovyShell.java:700)

                at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.doParse(CpsGroovyShell.java:129)

                at org.jenkinsci.plugins.workflow.cps.CpsGroovyShell.reparse(CpsGroovyShell.java:123)

                at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.parseScript(CpsFlowExecution.java:517)

                at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.start(CpsFlowExecution.java:480)

                at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:268)

                at hudson.model.ResourceController.execute(ResourceController.java:97)

                at hudson.model.Executor.run(Executor.java:429)

Finished: FAILURE

 

I checked the code of the File System SCM and of org.jenkinsci.plugins.workflow.steps.scm.SCMStep.checkout. When the SCMStep is not configured to write a changelog file, then to the FSSCM a null changelog File is handed.

This cause the Null Pointer Exception.