RMI报错：java.rmi.UnmarshalException: Error unmarshaling return;-优快云博客

本文讨论了在使用RMI（Remote Method Invocation）进行远程调用时遇到类找不到的问题，具体为java.rmi.UnmarshalException和java.lang.ClassNotFoundException。通过在MyEclipse中查找并引入相关包的方式解决了此问题。

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RMI工程报有个类找不到，信息如下：

java.rmi.UnmarshalException: Error unmarshaling return; nested exception is:
java.lang.ClassNotFoundException: com.mchange.v2.resourcepool.CannotAcquireResourceException (no security manager: RMI class loader disabled)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:227)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:142)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:178)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:132)
at $Proxy0.login(Unknown Source)
at com.thtf.authentication.action.LoginAction.login(LoginAction.java:73)
at com.thtf.authentication.action.LoginAction.login(LoginAction.java:57)
at com.thtf.client.Client.login(Client.java:35)
at com.thtf.client.Client.main(Client.java:28)
Caused by: java.lang.ClassNotFoundException: com.mchange.v2.resourcepool.CannotAcquireResourceException (no security manager: RMI class loader disabled)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:375)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:165)
at java.rmi.server.RMIClassLoader$2.loadClass(RMIClassLoader.java:620)
at java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:247)
at sun.rmi.server.MarshalInputStream.resolveClass(MarshalInputStream.java:197)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1575)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:225)
... 8 more
Exception in thread "main" com.thtf.rmi.exception.LoginException: 登录服务器校验失败,失败原因如下Error unmarshaling return; nested exception is:
java.lang.ClassNotFoundException: com.mchange.v2.resourcepool.CannotAcquireResourceException (no security manager: RMI class loader disabled)
at com.thtf.authentication.action.LoginAction.login(LoginAction.java:76)
at com.thtf.authentication.action.LoginAction.login(LoginAction.java:57)
at com.thtf.client.Client.login(Client.java:35)
at com.thtf.client.Client.main(Client.java:28)

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解决办法
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在myeclipse中用快捷键ctrl+shift+T找出CannotAcquireResourceException是否存在，如果没有找到，则说明没有这个类，引入相应的包即可。