这是失败的控制台输出：
Started by user XXXXX
Building remotely on XXXXXin workspace /var/www/html/XXXXX
[WS-CLEANUP] Deleting project workspace...
[WS-CLEANUP] Done
FATAL: null
java.lang.NullPointerException
at hudson.model.Fingerprint.addWithoutSaving(Fingerprint.java:1035)
at hudson.model.Fingerprint.add(Fingerprint.java:1030)
at hudson.model.Fingerprint.addFor(Fingerprint.java:1023)
at com.cloudbees.plugins.credentials.CredentialsProvider.trackAll(CredentialsProvider.java:1457)
at com.cloudbees.plugins.credentials.CredentialsProvider.track(CredentialsProvider.java:1421)
at hudson.plugins.git.GitSCM.createClient(GitSCM.java:844)
at hudson.plugins.git.GitSCM.createClient(GitSCM.java:812)
at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1180)
at hudson.scm.SCM.checkout(SCM.java:504)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1208)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:574)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:499)
at hudson.model.Run.execute(Run.java:1798)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:97)
at hudson.model.Executor.run(Executor.java:429)
Sending e-mails to: XXXXX@XXXXX.XXXXX
Finished: FAILURE
仅某些作业正在发生此故障，什么原因可以导致此故障？