After upgrading, Jenkins doesn’t start: org.xml.sax.saxparseexception: premature end of file How to fix java.lang.UnsupportedClassVersionError: Unsupported major.minor version CentOS JDK 설치 jenkins.log 확인 tail -f /var/log/jenkins/jenkins.log ... 경고: Failed startup of context w.@19f37d14{/,file:/var/cache/jenkins/war/,STARTING}{/var/cache/jenkins/war} java.lang.reflect.InvocationTargetException a..