java - 如何解析 WebappClassLoaderBase

Question

当我启动服务器时，它正在启动，但出现错误。因此无法进行 API 调用。这些是错误。

Jul 18, 2018 11:05:36 PM com.mongodb.ServerMonitor$ServerMonitorRunnable run
WARNING: Exception in monitor thread during notification of server state change
java.lang.NoClassDefFoundError: com/mongodb/ChangeEvent
    at com.mongodb.ServerMonitor$ServerMonitorRunnable.sendStateChangedEvent(ServerMonitor.java:136)
    at com.mongodb.ServerMonitor$ServerMonitorRunnable.run(ServerMonitor.java:119)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: Illegal access: this web application instance has been stopped already. Could not load [com.mongodb.ChangeEvent]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
    at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1362)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1219)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1180)
    ... 3 more
Caused by: java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [com.mongodb.ChangeEvent]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
    at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1372)
    at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1360)
    ... 5 more

Jul 18, 2018 11:05:36 PM org.apache.catalina.loader.WebappClassLoaderBase checkStateForResourceLoading
INFO: Illegal access: this web application instance has been stopped already. Could not load [java.util.concurrent.locks.Condition]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [java.util.concurrent.locks.Condition]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
    at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1372)
    at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1360)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1219)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1180)
    at com.mongodb.ServerMonitor$ServerMonitorRunnable.waitForSignalOrTimeout(ServerMonitor.java:177)
    at com.mongodb.ServerMonitor$ServerMonitorRunnable.waitForNext(ServerMonitor.java:158)
    at com.mongodb.ServerMonitor$ServerMonitorRunnable.run(ServerMonitor.java:124)
    at java.lang.Thread.run(Unknown Source)

Exception in thread "cluster-2-34.214.191.171:27017" java.lang.NoClassDefFoundError: java/util/concurrent/locks/Condition
    at com.mongodb.ServerMonitor$ServerMonitorRunnable.waitForSignalOrTimeout(ServerMonitor.java:177)
    at com.mongodb.ServerMonitor$ServerMonitorRunnable.waitForNext(ServerMonitor.java:158)
    at com.mongodb.ServerMonitor$ServerMonitorRunnable.run(ServerMonitor.java:124)
    at java.lang.Thread.run(Unknown Source)

Answer 1

问题出在这个类上

@Component
公共(public)类 APIsAuthentications 实现 Filter

用于 API 身份验证。在这个类中有一个方法叫做:

@Override
public void doFilter(ServletRequest servletRequest, ServletResponse 响应,
FilterChain链)抛出IOException、ServletException

这是验证 API 并期望 请求 header 中的 token/authentication。这里的 doFilter 方法还验证基本 URL 的 API 并给出响应 401。 tomcat 没有问题。

最后，我将一个条件放在 doFilter 方法中，如果它是 base URLs/Open URLs 则不会对这些 API 进行验证。

我的本​​地机器的基本 URL:http://localhost:8080/projects/

问题解决了!!! :)