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AbstractEnumeratorExternalizeable; no valid constructor [message #1535669]

Mon, 29 December 2014 16:24

Eclipse User

Hi,

I'm getting this error when my EMFStore server is attempting to de-serialize some data (more than likely some GMF notation classes which seems to be the only candidate here, but I don't have a set to reproduce).

It seems that AbstractEnumeratorExternalizeable has no default no-arg constructor and that is what would cause this error. But it seems strange that I find no reference to this issue elsewhere for code that has been around for ages.

Please advise
Alain

Caused by: java.lang.RuntimeException: java.io.InvalidClassException: org.eclipse.emf.common.util.AbstractEnumerator$AbstractEnumeratorExternalizeable; no valid constructor
at org.eclipse.emf.ecore.impl.EFactoryImpl.createFromString(EFactoryImpl.java:664)
at org.eclipse.emf.ecore.impl.EcoreFactoryImpl.createEJavaObjectFromString(EcoreFactoryImpl.java:927)
at org.eclipse.emf.ecore.impl.EcoreFactoryImpl.createFromString(EcoreFactoryImpl.java:148)
at org.eclipse.emf.ecore.xmi.impl.XMLHelperImpl.createFromString(XMLHelperImpl.java:1615)
at org.eclipse.emf.ecore.xmi.impl.XMLHelperImpl.setValue(XMLHelperImpl.java:1156)
at org.eclipse.emf.ecore.xmi.impl.XMLHandler.setFeatureValue(XMLHandler.java:2692)
... 46 more
Caused by: java.io.InvalidClassException: org.eclipse.emf.common.util.AbstractEnumerator$AbstractEnumeratorExternalizeable; no valid constructor
at java.io.ObjectStreamClass$ExceptionInfo.newInvalidClassException(Unknown Source)
at java.io.ObjectStreamClass.checkDeserialize(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at org.eclipse.emf.ecore.impl.EFactoryImpl.createFromString(EFactoryImpl.java:660)
... 51 more

Re: AbstractEnumeratorExternalizeable; no valid constructor [message #1536646 is a reply to message #1535669]

Tue, 30 December 2014 05:33

Eclipse User

Alain,

That seems strange. I'd expect
org.eclipse.emf.common.util.AbstractEnumerator.AbstractEnumeratorExternalizeable.readExternal(ObjectInput)
should be called... But it doesn't appear there is a proper test case
for this... Please open a bugzilla preferably with a test case of some
sort...

On 29/12/2014 10:24 PM, Alain Picard wrote:
> Hi,
>
> I'm getting this error when my EMFStore server is attempting to
> de-serialize some data (more than likely some GMF notation classes
> which seems to be the only candidate here, but I don't have a set to
> reproduce).
>
> It seems that AbstractEnumeratorExternalizeable has no default no-arg
> constructor and that is what would cause this error. But it seems
> strange that I find no reference to this issue elsewhere for code that
> has been around for ages.
>
> Please advise
> Alain
>
> Caused by: java.lang.RuntimeException: java.io.InvalidClassException:
> org.eclipse.emf.common.util.AbstractEnumerator$AbstractEnumeratorExternalizeable;
> no valid constructor
> at
> org.eclipse.emf.ecore.impl.EFactoryImpl.createFromString(EFactoryImpl.java:664)
> at
> org.eclipse.emf.ecore.impl.EcoreFactoryImpl.createEJavaObjectFromString(EcoreFactoryImpl.java:927)
> at
> org.eclipse.emf.ecore.impl.EcoreFactoryImpl.createFromString(EcoreFactoryImpl.java:148)
> at
> org.eclipse.emf.ecore.xmi.impl.XMLHelperImpl.createFromString(XMLHelperImpl.java:1615)
> at
> org.eclipse.emf.ecore.xmi.impl.XMLHelperImpl.setValue(XMLHelperImpl.java:1156)
> at
> org.eclipse.emf.ecore.xmi.impl.XMLHandler.setFeatureValue(XMLHandler.java:2692)
> ... 46 more
> Caused by: java.io.InvalidClassException:
> org.eclipse.emf.common.util.AbstractEnumerator$AbstractEnumeratorExternalizeable;
> no valid constructor
> at
> java.io.ObjectStreamClass$ExceptionInfo.newInvalidClassException(Unknown
> Source)
> at java.io.ObjectStreamClass.checkDeserialize(Unknown Source)
> at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
> at java.io.ObjectInputStream.readObject0(Unknown Source)
> at java.io.ObjectInputStream.readObject(Unknown Source)
> at
> org.eclipse.emf.ecore.impl.EFactoryImpl.createFromString(EFactoryImpl.java:660)
> ... 51 more

Re: AbstractEnumeratorExternalizeable; no valid constructor [message #1539029 is a reply to message #1536646]

Wed, 31 December 2014 13:29

Eclipse User

Ed,

It appears that the error is caused by the missing no-arg constructor, which would need to be invoked before.

As said, I'm trying to reproduce but that needs a specific diagram operation to be done which I'm not sure how it was created. When I do, I'll post a bugzilla.

Alain

Re: AbstractEnumeratorExternalizeable; no valid constructor [message #1562322 is a reply to message #1539029]

Tue, 13 January 2015 11:40

Eclipse User

I'm a colleague of Alain's facing the same issue.
I've created a formal bug report: bugs.eclipse.org/bugs/show_bug.cgi?id=457348

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