java - org.omg.CORBA :MARSHAL & org. omg.CORBA.BAD_PARAM 错误

Question

最近，我在维护一个非常旧的应用程序的 CORBA 通信过程中遇到了问题。客户端和服务器部分通过CORBA 进行通信。在服务器上客户端的特定函数调用中，我得到以下错误:

Not successful call - original stacktrace 
java.lang.Exception
    at de.tc.app.lamo.bss.util.dialog.AbstractCallProxy.<init>(AbstractCallProxy.java:135)
    at de.tc.app.lamo.bss.util.dialog.CallProxy.<init>(CallProxy.java:68)
    at de.tc.app.lamo.bss.util.dialog.BasisCtl.initiateServerCall(BasisCtl.java:186)
    at de.tc.app.lamo.bss.util.dialog.BasisCtl.initiateServerCall(BasisCtl.java:198)
    at de.tc.app.lamo.bss.dialog.stz.STZCtl.funcLesen(STZCtl.java:106)
    at de.tc.app.lamo.bss.dialog.stz.STZView$1.actionPerformed(STZView.java:163)
    at javax.swing.JTextField.fireActionPerformed(JTextField.java:492)
    at javax.swing.JTextField.postActionEvent(JTextField.java:705)
    at javax.swing.JTextField$NotifyAction.actionPerformed(JTextField.java:820)
    at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1639)
    at javax.swing.JComponent.processKeyBinding(JComponent.java:2859)
    at javax.swing.JComponent.processKeyBindings(JComponent.java:2894)
    at javax.swing.JComponent.processKeyEvent(JComponent.java:2822)
    at java.awt.Component.processEvent(Component.java:6074)
    at java.awt.Container.processEvent(Container.java:2039)
    at java.awt.Component.dispatchEventImpl(Component.java:4660)
    at java.awt.Container.dispatchEventImpl(Container.java:2097)
    at java.awt.Component.dispatchEvent(Component.java:4488)
    at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1856)
    at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:722)
    at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1000)
    at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:865)
    at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:686)
    at java.awt.Component.dispatchEventImpl(Component.java:4532)
    at java.awt.Container.dispatchEventImpl(Container.java:2097)
    at java.awt.Window.dispatchEventImpl(Window.java:2489)
    at java.awt.Component.dispatchEvent(Component.java:4488)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:668)
    at java.awt.EventQueue.access$400(EventQueue.java:81)
    at java.awt.EventQueue$2.run(EventQueue.java:627)
    at java.awt.EventQueue$2.run(EventQueue.java:625)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
    at java.awt.EventQueue$3.run(EventQueue.java:641)
    at java.awt.EventQueue$3.run(EventQueue.java:639)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:638)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Exception Serveraufruf: de.tc.app.lamo.awf.stub.Corba_St_STZAwf.lese
org.omg.CORBA.BAD_PARAM:   vmcid: 0x0  minor code: 0  completed: No
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at java.lang.Class.newInstance0(Class.java:355)
    at java.lang.Class.newInstance(Class.java:308)
    at com.inprise.vbroker.orb.SE.read(Unknown Source)
    at com.inprise.vbroker.orb.DelegateImpl.handleReply(Unknown Source)
    at com.inprise.vbroker.orb.DelegateImpl.invoke(Unknown Source)
    at org.omg.CORBA.portable.ObjectImpl._invoke(ObjectImpl.java:457)
    at de.tc.app.lamo.awf.corba._STZAwfStub.lese(_STZAwfStub.java:272)
    at de.tc.app.lamo.awf.stub.Corba_St_STZAwf.lese(Corba_St_STZAwf.java:50)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at de.tc.app.lamo.bss.util.dialog.AbstractCallProxy.call(AbstractCallProxy.java:145)
    at de.tc.app.lamo.bss.util.dialog.AbstractCallProxy.doCall(AbstractCallProxy.java:431)
    at de.tc.app.lamo.bss.util.dialog.AbstractCallProxy.run(AbstractCallProxy.java:346)
    at de.tc.app.lamo.bss.util.dialog.CallProxy.run(CallProxy.java:141)
    at java.lang.Thread.run(Thread.java:662)

该错误是可重现的。在调试过程中，我可以看到数据像往常一样由后端加载并到达客户端。客户端实际上得到了响应，但无法处理数据。

相同的函数调用适用于其他数据。只有一些特定的数据选择没有完成。

我无法检测到这些数据之间有任何显着差异。 idl 定义也没有改变。

您对我在哪里查找错误原因有任何提示吗？

Answer 1

根据 friend 的建议，如果服务器和客户端使用不同的 lib 版本，则会抛出 org.omg.CORBA.MARSHAL。我无法解释它是如何发生在我的项目中的，但是这个特定的错误自行消失了:-/

我的案例中的实际问题是 org.omg.CORBA.BAD_PARAM 异常，这是由以下代码行引起的:

public static void write (final org.omg.CORBA.portable.OutputStream _output, final de.tc.app.lamo.comm.STZFlugereignis _vis_value) {
    ...
    _output.write_string((java.lang.String)_vis_value.flugNr);
    ...
    }

其中 _vis_value.flugNr 为空。

实际上是一个 NullPointerException，但被 VisiBroker 隐藏在 CORBA-Exception 下以及相关的堆栈跟踪中。