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https://issues.apache.org/jira/browse/OPENJPA-559?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Albert Lee closed OPENJPA-559.
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> java.rmi.MarshalException due to mismatched serialization UIDs of: Source
> (RepId RMI:org.apache.openjpa.kernel.DetachedStateManager
> -----------------------------------------------------------------------------------------------------------------------------------
>
> Key: OPENJPA-559
> URL: https://issues.apache.org/jira/browse/OPENJPA-559
> Project: OpenJPA
> Issue Type: Bug
> Components: kernel
> Affects Versions: 1.0.3, 1.1.0
> Reporter: Albert Lee
> Assignee: Albert Lee
> Fix For: 1.0.3, 1.1.0
>
>
> When a JSE client requests JPA function via components in an application
> server, in some combination of client/server operating environment, the
> client request failed with the following exception even if the client and
> server are using the same level of OpenJPA code:
> java.rmi.MarshalException. Error Message is:CORBA MARSHAL 0x4942f896 No;
> nested exception is:
> org.omg.CORBA.MARSHAL: Unable to read value from underlying bridge :
> Mismatched
> serialization UIDs : Source (RepId
> RMI:org.apache.openjpa.kernel.DetachedStateManager
> :C7D15E4B35987A3F:766FF0A32408BC7A) = 766FF0A32408BC7A whereas Target (RepId
> RMI:org.apache.openjpa.kernel.DetachedStateManager:47697E6CFD3BF01F:548BD6248B0927C4)
> = 548BD6248B0927C4
> One of the test environment combination that we have observed this exception
> is a Win32 client and a SunOS application server configuration. The client
> uses IBM JDK and SunOS uses Sun JDK.
> From the JavaDoc Serializable class:
> "If a serializable class does not explicitly declare a serialVersionUID, then
> the serialization runtime will calculate a default serialVersionUID value for
> that class based on various aspects of the class, as described in the
> Java(TM) Object Serialization Specification. However, it is strongly
> recommended that all serializable classes explicitly declare serialVersionUID
> values, since the default serialVersionUID computation is highly sensitive to
> class details that may vary depending on compiler implementations, and can
> thus result in unexpected InvalidClassExceptions during deserialization.
> Therefore, to guarantee a consistent serialVersionUID value across different
> java compiler implementations, a serializable class must declare an explicit
> serialVersionUID value. It is also strongly advised that explicit
> serialVersionUID declarations use the private modifier where possible, since
> such declarations apply only to the immediately declaring
> class--serialVersionUID fields are not useful as inherited members."
> Adding the following in DetachedStateManager resolved the problem.
> private static final long serialVersionUID = 6092198373388527556L;
> Albert Lee.
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