I came across the same problem when I upgrade jenkins first then downgrade it .
my solution here hopes could help someone: 1. service jenkins stop 2. mv JENKINS_HOME/config.xml JENKINS_HOME/config.xml_bak 3. service jenkins start then I can use jenkins without authentication. there are still some problems which is not totally fixed I simply upgrade jenkins again and recover original config.xml by doing: mv JENKINS_HOME/config.xml_bak JENKINS_HOME/config.xml service jenkins restart finally every job can be built again normally. thanks god. I would never trying to do this upgrading/downgrading things without backup! 在 2018年3月3日星期六 UTC+8下午6:23:27，Poovaraj Thangamariappan写道： > > Hi Team, > > I have downgraded Jenkins latest version to old version(2.48). I got below > error message after launch the Jenkins. Please help me to fix this issues. > > org.xmlpull.v1.XmlPullParserException: only 1.0 is supported as <?xml version > not '1.1' (position: START_DOCUMENT seen <?xml version=\'1.1\'... @1:19) > at org.xmlpull.mxp1.MXParser.parseXmlDeclWithVersion(MXParser.java:2608) > at org.xmlpull.mxp1.MXParser.parseXmlDecl(MXParser.java:2592) > at org.xmlpull.mxp1.MXParser.parsePI(MXParser.java:2466) > at org.xmlpull.mxp1.MXParser.parseProlog(MXParser.java:1447) > at org.xmlpull.mxp1.MXParser.nextImpl(MXParser.java:1395) > at org.xmlpull.mxp1.MXParser.next(MXParser.java:1093) > at > com.thoughtworks.xstream.io.xml.XppReader.pullNextEvent(XppReader.java:109) > Caused: com.thoughtworks.xstream.io.StreamException: : only 1.0 is supported > as <?xml version not '1.1' (position: START_DOCUMENT seen <?xml > version=\'1.1\'... @1:19) > at > com.thoughtworks.xstream.io.xml.XppReader.pullNextEvent(XppReader.java:124) > at > com.thoughtworks.xstream.io.xml.AbstractPullReader.readRealEvent(AbstractPullReader.java:148) > at > com.thoughtworks.xstream.io.xml.AbstractPullReader.readEvent(AbstractPullReader.java:141) > at > com.thoughtworks.xstream.io.xml.AbstractPullReader.move(AbstractPullReader.java:118) > at > com.thoughtworks.xstream.io.xml.AbstractPullReader.moveDown(AbstractPullReader.java:103) > at com.thoughtworks.xstream.io.xml.XppReader.<init>(XppReader.java:63) > at > com.thoughtworks.xstream.io.xml.AbstractXppDriver.createReader(AbstractXppDriver.java:54) > at > com.thoughtworks.xstream.io.xml.AbstractXppDriver.createReader(AbstractXppDriver.java:65) > at hudson.XmlFile.unmarshal(XmlFile.java:159) > Caused: java.io.IOException: Unable to read C:\Users\poo\.jenkins\config.xml > at hudson.XmlFile.unmarshal(XmlFile.java:161) > at jenkins.model.Jenkins.loadConfig(Jenkins.java:3022) > at jenkins.model.Jenkins.access$1200(Jenkins.java:304) > at jenkins.model.Jenkins$16.run(Jenkins.java:3040) > at > org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169) > at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:282) > at jenkins.model.Jenkins$7.runTask(Jenkins.java:1064) > at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:210) > at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117) > at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown > Source) > at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown > Source) > at java.base/java.lang.Thread.run(Unknown Source) > Caused: org.jvnet.hudson.reactor.ReactorException > at org.jvnet.hudson.reactor.Reactor.execute(Reactor.java:269) > at jenkins.InitReactorRunner.run(InitReactorRunner.java:47) > at jenkins.model.Jenkins.executeReactor(Jenkins.java:1088) > at jenkins.model.Jenkins.<init>(Jenkins.java:904) > at hudson.model.Hudson.<init>(Hudson.java:85) > at hudson.model.Hudson.<init>(Hudson.java:81) > at hudson.WebAppMain$3.run(WebAppMain.java:231) > Caused: hudson.util.HudsonFailedToLoad > at hudson.WebAppMain$3.run(WebAppMain.java:248) > > > Regards, > Poovaraj > -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/4c644b8e-6ad5-4913-8269-78e42bdf5afa%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
