I have generated font extention jar as per below link-: https://community.jaspersoft.com/wiki/custom-font-font-extension Now my pom.xml includes below jars-: jasperreports (Version 6.0.0) Interstate-Fonts(Custom font jar generated though above link) jasperreports-fonts (Version 6.11.0) Some times i'm able to run report with "Interstate fonts". But intermittently i am also facing below issue-: net.sf.jasperreports.engine.util.JRFontNotFoundException: Font 'Interstate' is not available to the JVM. See the Javadoc for more details. Am I missing anything here which causing this issue.