Jenkins Production environment. Jenkins jobs disappear (Freestyle job with PowerShell plugin and parameters ) after Windows slave restart. Tried this... Check Jenkins logs for errors (Manage Jenkins/System Log) Fix the errors in config.xml of each job. ( path: JENKINS_HOME/jobs//config.xml) Restart jenkins or choose option reload configurations from disk (Manage Jenkins/Reload Configuration from Disk). Then had to recreate the job. Would you please tell me why did the job definition disappear? Is this a bug?