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[CDO] Exception when switching to Oxygen [message #1767683]

Sun, 09 July 2017 14:55

Bernard Sarter

Messages: 88
Registered: August 2011
Location: Paris, France

Member

Hello,

I've an application which works fine when Target Platform = Neon. I tried to switch to Target Platform = Oxygen.

My CDO server starts normally, but the CDO client fails to start with following stack trace:

!MESSAGE Rollback in DBStore: java.lang.ClassCastException: org.eclipse.emf.cdo.server.internal.db.mapping.horizontal.HorizontalMappingStrategy cannot be cast to org.eclipse.emf.cdo.server.internal.db.mapping.horizontal.HorizontalNonAuditMappingStrategy
	at org.eclipse.emf.cdo.server.internal.db.mapping.horizontal.AbstractBasicListTableMapping$AbstractListDeltaWriter.writeListDeltas(AbstractBasicListTableMapping.java:168)
	at org.eclipse.emf.cdo.server.internal.db.mapping.horizontal.NonAuditListTableMapping.processDelta(NonAuditListTableMapping.java:218)
	at org.eclipse.emf.cdo.server.internal.db.mapping.horizontal.HorizontalNonAuditClassMapping$FeatureDeltaWriter.visit(HorizontalNonAuditClassMapping.java:634)
	at org.eclipse.emf.cdo.internal.common.revision.delta.CDOListFeatureDeltaImpl.accept(CDOListFeatureDeltaImpl.java:592)
	at org.eclipse.emf.cdo.internal.common.revision.delta.CDORevisionDeltaImpl.accept(CDORevisionDeltaImpl.java:364)
	at org.eclipse.emf.cdo.internal.common.revision.delta.CDORevisionDeltaImpl.accept(CDORevisionDeltaImpl.java:354)
	at org.eclipse.emf.cdo.server.internal.db.mapping.horizontal.HorizontalNonAuditClassMapping$FeatureDeltaWriter.process(HorizontalNonAuditClassMapping.java:584)
	at org.eclipse.emf.cdo.server.internal.db.mapping.horizontal.HorizontalNonAuditClassMapping.writeRevisionDelta(HorizontalNonAuditClassMapping.java:512)
	at org.eclipse.emf.cdo.server.internal.db.DBStoreAccessor.writeRevisionDelta(DBStoreAccessor.java:558)
	at org.eclipse.emf.cdo.server.internal.db.DBStoreAccessor.writeRevisionDeltas(DBStoreAccessor.java:544)
	at org.eclipse.emf.cdo.spi.server.StoreAccessor.doWrite(StoreAccessor.java:109)
	at org.eclipse.emf.cdo.server.internal.db.DBStoreAccessor.doWrite(DBStoreAccessor.java:888)
	at org.eclipse.emf.cdo.spi.server.StoreAccessorBase.write(StoreAccessorBase.java:138)
	at org.eclipse.emf.cdo.internal.server.TransactionCommitContext.writeAccessor(TransactionCommitContext.java:1612)
	at org.eclipse.emf.cdo.internal.server.TransactionCommitContext.write(TransactionCommitContext.java:737)
	at org.eclipse.emf.cdo.spi.server.InternalCommitContext$1.runLoop(InternalCommitContext.java:49)
	at org.eclipse.emf.cdo.spi.server.InternalCommitContext$1.runLoop(InternalCommitContext.java:1)
	at org.eclipse.net4j.util.om.monitor.ProgressDistributor.run(ProgressDistributor.java:95)
	at org.eclipse.emf.cdo.internal.server.Repository.commitUnsynced(Repository.java:1204)
	at org.eclipse.emf.cdo.internal.server.Repository.commit(Repository.java:1197)
	at org.eclipse.emf.cdo.server.internal.net4j.protocol.CommitTransactionIndication.indicatingCommit(CommitTransactionIndication.java:316)
	at org.eclipse.emf.cdo.server.internal.net4j.protocol.CommitTransactionIndication.indicating(CommitTransactionIndication.java:102)
	at org.eclipse.emf.cdo.server.internal.net4j.protocol.CDOServerIndicationWithMonitoring.indicating(CDOServerIndicationWithMonitoring.java:118)
	at org.eclipse.net4j.signal.IndicationWithMonitoring.indicating(IndicationWithMonitoring.java:87)
	at org.eclipse.net4j.signal.IndicationWithResponse.doExtendedInput(IndicationWithResponse.java:100)
	at org.eclipse.net4j.signal.Signal.doInput(Signal.java:377)
	at org.eclipse.net4j.signal.IndicationWithResponse.execute(IndicationWithResponse.java:73)
	at org.eclipse.net4j.signal.IndicationWithMonitoring.execute(IndicationWithMonitoring.java:66)
	at org.eclipse.net4j.signal.Signal.runSync(Signal.java:283)
	at org.eclipse.net4j.signal.Signal.run(Signal.java:162)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)

The CDO configuration is:

	<repository name="myRepo">
        <property name="overrideUUID" value="1ff5d226-b1f0-40fb-aba2-0c31b38c764f" />
        <property name="supportingAudits" value="false" />

        <store type="db">
            <mappingStrategy type="horizontal">
                <property name="qualifiedNames" value="false" />
                <property name="toManyReferences" value="ONE_TABLE_PER_REFERENCE" />
                <property name="toOneReferences" value="LIKE_ATTRIBUTES" />
            </mappingStrategy>

            <dbAdapter name="postgresql" />
            <dataSource class="org.postgresql.ds.PGSimpleDataSource"
                url="jdbc:postgresql://localhost:5432/foo" createDatabaseIfNotExist="true"
                user="cdo" password="****" />

        </store>
    </repository>

If I set "supportingAudits" to "true", the exception disappears (but I don't want to do that ...)

Any suggestion ?

Regards,
Bernard.

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Re: [CDO] Exception when switching to Oxygen [message #1769108 is a reply to message #1767683]

Wed, 26 July 2017 15:04

Richard Meyer

Messages: 40
Registered: June 2012

Member

Hy Bernard,

same problem here!
Did you find a solution?

Many Thanks
Richard

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Re: [CDO] Exception when switching to Oxygen [message #1769147 is a reply to message #1769108]

Thu, 27 July 2017 05:37

Eike Stepper

Messages: 6382
Registered: July 2009

Senior Member

There is a bug in the "horizontal" mapping strategy that leads to the CCE you've seen. I'll fix it soon. In the meantime you can work around the problem by using this mapping strategy:

<mappingStrategy type="horizontalNonAuditing">

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Re: [CDO] Exception when switching to Oxygen [message #1775964 is a reply to message #1769147]

Wed, 08 November 2017 16:00

SWT Wasserhardt

Messages: 6
Registered: May 2016

Junior Member

Hi,

I have the same issue, but I need to enable auditing.

In cdo-server.xml :
<property name="supportingAudits" value="true" />

In the code, I use : org.eclipse.emf.cdo.server.internal.db.mapping.horizontal.HorizontalMappingStrategy

I get the exception shown in the OP.
I tried to workaround by using :
org.eclipse.emf.cdo.server.internal.db.mapping.horizontal.HorizontalNonAuditMappingStrategy

And I still have in cdo-server.xml :
<property name="supportingAudits" value="true" />

This worked fine for my previous uses cases : the database stores previous revisions of objects, so that CDO can provide old values when clients receive remote deletion notifications.

But now I have a new use case where I open audit views, and it fails because org.eclipse.emf.cdo.server.internal.db.mapping.horizontal.HorizontalNonAuditMappingStrategy does not allow audits :

java.lang.IllegalArgumentException: Mapping Strategy does not support audits
at org.eclipse.emf.internal.cdo.view.AbstractCDOView.registerProxyResource2(AbstractCDOView.java:2402) ~[na:na]
at org.eclipse.emf.internal.cdo.view.AbstractCDOView.attachResource(AbstractCDOView.java:2355) ~[na:na]
at org.eclipse.emf.cdo.eresource.impl.CDOResourceImpl.basicSetResourceSet(CDOResourceImpl.java:1682) ~[na:na]
at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl$ResourcesEList.inverseAdd(ResourceSetImpl.java:586) ~[na:na]
at org.eclipse.emf.common.notify.impl.NotifyingListImpl.addUnique(NotifyingListImpl.java:286) ~[na:na]
at org.eclipse.emf.common.util.AbstractEList.add(AbstractEList.java:305) ~[na:na]
at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.createResource(ResourceSetImpl.java:435) ~[na:na]
at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandCreateResource(ResourceSetImpl.java:243) ~[na:na]
at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getResource(ResourceSetImpl.java:400) ~[na:na]
at org.eclipse.emf.internal.cdo.view.AbstractCDOView.getResource(AbstractCDOView.java:1378) ~[na:na]
at org.eclipse.emf.internal.cdo.view.AbstractCDOView.getResource(AbstractCDOView.java:1360) ~[na:na]

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Re: [CDO] Exception when switching to Oxygen [message #1775965 is a reply to message #1775964]

Wed, 08 November 2017 16:08

SWT Wasserhardt

Messages: 6
Registered: May 2016

Junior Member

I opened a Buzilla :
https://bugs.eclipse.org/bugs/show_bug.cgi?id=527002

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Re: [CDO] Exception when switching to Oxygen [message #1776503 is a reply to message #1775965]

Fri, 17 November 2017 06:04

Eike Stepper

Messages: 6382
Registered: July 2009

Senior Member

Hi,

In the meantime you could work around the problem by using the HorizontalNonAuditMappingStrategy. The cdo-server.xml file would contain the following:

<mappingStrategy type="horizontalAuditing">

Cheers
/Eike

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Re: [CDO] Exception when switching to Oxygen [message #1776528 is a reply to message #1776503]

Fri, 17 November 2017 10:23

SWT Wasserhardt

Messages: 6
Registered: May 2016

Junior Member

Hi,

You meant HorizontalAuditMappingStrategy. This worked like a charm !
I didn't see there was this specific class...

I updated the bugzilla to sum up how to workaround each use case.

Thank you a lot !

[Updated on: Fri, 17 November 2017 10:34]

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