我在GAE Java中开发了一个应用程序,但是我只在部署版本上收到错误,我无法在本地环境中改善这种情况。
当我调用我已经创建的servlet时,该过程结束时没有任何错误(我记录了很多所有过程以解决此问题)。 servlet打印响应输出,然后代码完成。
但是在此过程之后我收到以下错误,因此客户端收到的真实响应是经典的错误500页面。
java.lang.RuntimeException: java.io.NotSerializableException: java.util.logging.Logger
at com.google.apphosting.runtime.SessionManagerUtil.serialize(SessionManagerUtil.java:31)
at com.google.apphosting.runtime.jetty.DatastoreSessionStore.createEntityForSession(DatastoreSessionStore.java:72)
at com.google.apphosting.runtime.jetty.DatastoreSessionStore.saveSession(DatastoreSessionStore.java:94)
at com.google.apphosting.runtime.jetty.SessionManager$AppEngineSession.save(SessionManager.java:156)
at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:41)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter(JdbcMySqlConnectionCleanupFilter.java:57)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:266)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:146)
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:439)
at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:480)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:487)
at com.google.tracing.TraceContext.runInContext(TraceContext.java:774)
at com.google.tracing.TraceContext$DoInTraceContext.runInContext(TraceContext.java:751)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:342)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:334)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:484)
at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
at java.lang.Thread.run(Thread.java:679)
Caused by: java.io.NotSerializableException: java.util.logging.Logger
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1197)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1545)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1191)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:363)
at java.util.HashMap.writeObject(HashMap.java:1018)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:962)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1497)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1191)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:363)
at com.google.apphosting.runtime.SessionManagerUtil.serialize(SessionManagerUtil.java:28)
... 32 more
我已经读过in this page这是一个共同的错误,因为Logger不可序列化,所以我在我的项目中声明所有Logger
final static transient Logger = Logger.getLogger(MyClass.class.getName());
但仍然没有解决方案...... 我整天都在努力解决这个问题(事实上,只有部署版本的问题没有帮助......)
我还需要澄清一下,2周前部署的版本运行完美,没有任何问题。今天,相同的版本开始处理错误,如解释。 我想知道原因可能是GAE 1.8.0的新发布版本
感谢您的支持 此致
答案 0 :(得分:0)
在每个使用Log
的类中使用此“技巧”解决了这个问题public Logger log()
{
return Logger.getLogger(this.class.getName());
}
然后在需要日志的类中,我使用了
log().info(...);
log().severe(...);
....
使用此过程,类不存储对象Logger,因此在序列化期间不会尝试序列化Logger对象