The only fix (as far as I know) is to edit the XML files and change the '1.1' to '1.0'. You could do that by restoring your XML files from backup or by editing them.
Downgrade of a Jenkins version without downgrading the configuration files to match the Jenkins version is difficult. On Fri, Jan 25, 2019 at 6:50 AM Aparna venugopal <aparnaven...@gmail.com> wrote: > Can you please share how you fixed your issue? I got the same issue wwhen > I downgraded to 2.79 > > On Saturday, March 3, 2018 at 6:20:46 PM UTC+5:30, Poovaraj > Thangamariappan wrote: >> >> >> It is working fine after installing Jenkins 2.48 version >> >> On Sat, Mar 3, 2018 at 4:00 PM, Baptiste Mathus <m...@batmat.net> wrote: >> >>> The recommended path is to use and restore your backup. Downgrading is >>> not (yet) a supported use case. >>> >>> XML version was upgraded from 1.0 to 1.1 in 2.105 >>> https://jenkins.io/changelog/#v2.105 >>> >>> Looking at how often you upgrade, you really should use the LTS vesion >>> of Jenkins, not the weekly. Cf. https://jenkins.io/download/lts/ >>> >>> 2018-03-03 7:35 GMT+01:00 Poovaraj Thangamariappan <poovar...@gmail.com> >>> : >>> >>>> 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 jenkinsci-use...@googlegroups.com. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/jenkinsci-users/cf6d78d2-6495-4801-8efa-915c3e532153%40googlegroups.com >>>> <https://groups.google.com/d/msgid/jenkinsci-users/cf6d78d2-6495-4801-8efa-915c3e532153%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >>> 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 jenkinsci-use...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/jenkinsci-users/CANWgJS6bjbspVHppJQn7YCcJbsPhr1iMWEZxxqCVmaKG3z1Vug%40mail.gmail.com >>> <https://groups.google.com/d/msgid/jenkinsci-users/CANWgJS6bjbspVHppJQn7YCcJbsPhr1iMWEZxxqCVmaKG3z1Vug%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >>> >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- > 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 jenkinsci-users+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/jenkinsci-users/7738900f-9f4e-46c1-8e72-f3f68cdca402%40googlegroups.com > <https://groups.google.com/d/msgid/jenkinsci-users/7738900f-9f4e-46c1-8e72-f3f68cdca402%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- Thanks! Mark Waite -- 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 jenkinsci-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/CAO49JtHDvEqrCtcRh7aX3Gf9X20UogWA7wdJvmEprRb5i98q1w%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
