Tomcat服务器无法启动，服务器xml可能配置错误？

Question

我写了非常基本的代码。而servlet可能是问题所在，因为否则，tomcat可以完美启动并到达index.html

我已经使用Eclipse IDE配置了tomcat。尝试从servlet开始时出现this错误。

堆栈跟踪为

foreach($array['data']['items'] as $item){
   foreach($item['origin_info']['trackinfo'] as $trackinfo){
     echo $trackinfo['checkpoint_status'].PHP_EOL;
   }
}

我的xml配置

Jun 28, 2019 1:41:16 PM org.apache.catalina.core.ContainerBase startInternal
SEVERE: A child container failed during start

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component 

[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/User_Test_Series-1]]
    at java.util.concurrent.FutureTask.report(Unknown Source)
    at java.util.concurrent.FutureTask.get(Unknown Source)