java.lang.IllegalArgumentException：空源
我们有一个使用 JSF2 和 Spring 的应用程序。该应用程序部署后工作正常。但是，如果我执行以下步骤，就会发生这种情况：
- 打开应用程序的登录页面。
- 在服务器上重新部署应用程序。
尝试使用之前打开的登录页面登录，但显示以下异常：
javax.servlet.ServletException：空源 在 javax.faces.webapp.FacesServlet.service(FacesServlet.java:321) 在org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate（DelegatingFilterProxy.java:237） 在 org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167) 根本原因 java.lang.IllegalArgumentException：空源 在 java.util.EventObject.(EventObject.java:38) 在 javax.faces.event.SystemEvent. (SystemEvent.java:67) 在 javax.faces.event.ComponentSystemEvent. (ComponentSystemEvent.java:69) 在 javax.faces.event.PostRestoreStateEvent. (PostRestoreStateEvent.java:69) 在 com.sun.faces.lifecycle.RestoreViewPhase.deliverPostRestoreStateEvent(RestoreViewPhase.java:256) 在 com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:245) 在 com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97) 在com.sun.faces.lifecycle.RestoreViewPhase.doPhase（RestoreViewPhase.java:107） 在 com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:114) 在 javax.faces.webapp.FacesServlet.service(FacesServlet.java:308)
如果我单击第一个登录页面，然后输入登录详细信息，则应用程序不会中断。仅当我尝试将先前加载的登录页面与新部署的应用程序一起使用时，才会发生这种情况。
有人知道答案吗？
We have an application which uses JSF2 and Spring. The application works fine when deployed. But this happens if I went through the following steps:
- Open the login page of the application.
- Redeployed the application on the server.
Tried to login using the previously opened login page, and it shows the following exception:
javax.servlet.ServletException: null source at javax.faces.webapp.FacesServlet.service(FacesServlet.java:321) at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237) at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167) root cause java.lang.IllegalArgumentException: null source at java.util.EventObject.<init>(EventObject.java:38) at javax.faces.event.SystemEvent.<init>(SystemEvent.java:67) at javax.faces.event.ComponentSystemEvent.<init>(ComponentSystemEvent.java:69) at javax.faces.event.PostRestoreStateEvent.<init>(PostRestoreStateEvent.java:69) at com.sun.faces.lifecycle.RestoreViewPhase.deliverPostRestoreStateEvent(RestoreViewPhase.java:256) at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:245) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:97) at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:107) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:114) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:308)
If I click on the first login page and then enter the login details the application does not break. This only occurs if I try to use the previously loaded login page with the newly deployed application.
Anyone knows the answer?
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这个应该作为
ViewExpiredException抛出。这是一个在 Mojarra 2.0.3 中开始出现的错误，并在 Mojarra 2.1.0 中得到修复。另请参阅问题 1762（请注意，Mojarra 2.1.0 不适用于 Tomcat/Jetty，至少使用 Mojarra 2.1.1）。基本上，当 Mojarra 无法构建或恢复视图时，它通常会抛出一个足够具体的异常，但由于此错误，代码中稍后会错误地预期有效视图，从而导致
IllegalArgumentException: null source。可能的真正原因是视图包含一个简单的 XML 语法错误，例如缺少标签或损坏的属性值，Mojarra 通常会抛出一个FaceletException带有非常详细的消息，包括行号和位置等。为了防止
ViewExpiredException，您必须通过 GET 请求刷新页面，然后再对其执行任何操作。如果您使用的 Mojarra 版本没有出现此错误（例如 2.0.2 或更低版本，或者 2.1.0 或更高版本），那么您可以使用web.xml中处理特定异常，并提供一个自定义错误页面，其中通知最终用户会话已过期，以及指向初始请求 URI 的链接。This one should have been thrown as a
ViewExpiredException. It's a bug which started to manifest in Mojarra 2.0.3 and is been fixed in Mojarra 2.1.0. See also issue 1762 (note that Mojarra 2.1.0 doesn't work on Tomcat/Jetty, use at least Mojarra 2.1.1 then).Basically, when Mojarra fails to build or restore the view, then it usually throws a specific enough exception, but due to this bug, a valid view was incorrectly been expected later in the code which in turn results in
IllegalArgumentException: null source. The possible real cause would have been that the view contains a simple XML syntax error, such as a missing tag or broken attribute value, for which Mojarra would usually have thrown aFaceletExceptionwith a very detailed message with line number and position and such.To prevent the
ViewExpiredException, you would have to refresh the page by a GET request before doing any actions on it. If you're using a Mojarra version where this bug does not manifest (e.g. 2.0.2 or older, or 2.1.0 or newer), then you could gracefully handle it with an<error-page>inweb.xmlon the particular exception and provide a custom error page wherein the enduser is informed that the session has been expired, along with a link to the initial request URI.这看起来像 http://java.net/jira/browse/JAVASERVERFACES-1758
其中Mojarra 2.1.x 中未修复
This looks like http://java.net/jira/browse/JAVASERVERFACES-1758
which is not fixed in Mojarra 2.1.x
只要将javax.faces.PARTIAL_STATE_SAVING设置为false，您就会收到java.lang.IllegalArgumentException。如果您将javax.faces.PARTIAL_STATE_SAVING设置为true（并且您知道自己在做什么），您将获得“好旧的”javax.faces.application。 ViewExpiredException 返回。
As long as javax.faces.PARTIAL_STATE_SAVING is set to false you'll receive that java.lang.IllegalArgumentException. If you set javax.faces.PARTIAL_STATE_SAVING to true (and you know what you are doing) you will get the "good old" javax.faces.application.ViewExpiredException back.
就我而言，结果是我在 xhtml 文件中缺少 jstl 调用之一的结束标记。我正在使用选择标签，并且选择之间的时间标签之一没有结束标签
In my case turned out i had missing end tag in xhtml file for one of the jstl calls. i was using choose tag and one of the when tags in between choose did not have an end tag