配置文件错误导致jenkins无法启动 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)

    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:167)
    Caused: java.io.IOException: Unable to read /var/lib/jenkins/config.xml
        at hudson.XmlFile.unmarshal(XmlFile.java:169)
        at jenkins.model.Jenkins.loadConfig(Jenkins.java:3067)
        at jenkins.model.Jenkins.access$1200(Jenkins.java:304)
        at jenkins.model.Jenkins$14.run(Jenkins.java:3085)
        at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169)
        at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:282)
        at jenkins.model.Jenkins$5.runTask(Jenkins.java:1068)
        at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:210)
        at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
    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:1102)
        at jenkins.model.Jenkins.<init>(Jenkins.java:904)
        at hudson.model.Hudson.<init>(Hudson.java:86)
        at hudson.model.Hudson.<init>(Hudson.java:82)
        at hudson.WebAppMain$3.run(WebAppMain.java:233)
    Caused: hudson.util.HudsonFailedToLoad
        at hudson.WebAppMain$3.run(WebAppMain.java:250) 

这里注意红字的部分，提示配置文件中只支持1.0，而不是1.1。

然后查看配置文件config.xml发现第一行中果然是1.1,改回来。

实际可能还有其他文件，一一改正就对了。

这个报错在2.87升级到2.103之后出现，我猜测了下出现的原因可能是需要一些插件更新。毕竟我由于网络原因有一部分插件更新失败....

我倒是不太确认是不是新版本问题，反正下次我绝对不手贱！！！！