jakarta-ee - "Exception while loading the app"没有堆栈跟踪

Question

我正在将我的应用程序从 GlassFish 3.0.1 迁移到 GlassFish 3.1.1。部署失败，并显示以下错误消息:

SEVERE: Exception while loading the app
SEVERE: Exception while shutting down application container
SEVERE: Exception while shutting down application container : java.lang.NullPointerException
SEVERE: java.lang.RuntimeException: Error occurred during deployment: Exception while shutting down application container : java.lang.NullPointerException. Please see server.log for more details. 

没有堆栈跟踪。我将根日志记录级别打开为 FINEST，第一条 SEVERE 消息出现在 Weld 消息之后:

//...
FINE: WELD-000105 Enabled interceptor types for Manager
Enabled alternatives: [] []
Registered contexts: [interface javax.enterprise.context.SessionScoped, interface javax.enterprise.context.RequestScoped, interface javax.inject.Singleton, interface javax.enterprise.context.Dependent, interface javax.enterprise.context.ApplicationScoped, interface javax.enterprise.context.ConversationScoped]
Registered beans: 0
Specialized beans: 0
: []

在几条这样的消息之前(针对几个不同的类):

FINE: PWC4451: File cannot be read /opt/sun/glassfish-3.1.1/glassfish/domains/domain1/applications/QmsWeb/WEB-INF/classes/org/jboss/seam/transaction/SeamTransaction.class
FINE: PWC4451: File cannot be read /opt/sun/glassfish-3.1.1/glassfish/domains/domain1/applications/QmsWeb/WEB-INF/classes/org/jboss/seam/transaction/SeamTransaction.class
FINE: PWC4451: File cannot be read /opt/sun/glassfish-3.1.1/glassfish/domains/domain1/applications/QmsWeb/WEB-INF/classes/net/sf/ehcache/config/TerracottaConfiguration$ValueMode.class
//...

什么可能导致此错误？这些 PWC4451 消息是否表明某些库没有被加载？

Answer 1

这是由于 @ViewScoped bean 没有实现 Serializable。显然，我们使用的旧版本 Weld 并没有发现钝化作用域 bean 不可序列化这一点令人反感，但由于这个原因，这个版本无声无息地失败了。哦，好吧，希望这可以节省一些时间。