部署blog的时候，出现了以下错误

严重: ContainerBase.addChild: start: 
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[192.168.0.109].StandardContext[/my-blog-3.0.1-SNAPSHOT]]
    at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:440)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:1007)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:983)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:639)
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1127)
    at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:2020)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.IllegalArgumentException: More than one fragment with the name [org_apache_tomcat_websocket] was found. This is not legal with relative ordering. See section 8.2.2 2c of the Servlet specification for details. Consider using absolute ordering.
    at org.apache.catalina.deploy.WebXml.orderWebFragments(WebXml.java:2338)
    at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1279)
    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:888)
    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:388)
    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5545)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
    ... 10 more

四月 07, 2020 12:43:18 上午 org.apache.catalina.startup.HostConfig deployWAR
严重: 部署 Web 应用程序 archive [C:\Program Files\Apache Software Foundation\Tomcat 7.0\webapps\my-blog-3.0.1-SNAPSHOT.war] 时出错
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[192.168.0.109].StandardContext[/my-blog-3.0.1-SNAPSHOT]]
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:1011)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:983)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:639)
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1127)
    at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:2020)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

 

为什么呢？