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Type: Bug
Resolution: Done
Priority: Critical
Fix Version/s: 2.5.1.GA, 2.6.0.Final
Affects Version/s: 2.6.0.Beta2
Component/s: Federation, JCR
Labels:
- federation

Steps to Reproduce:

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This code produces the exception:

node.setProperty("prop", (Value)null);
session.save();

The modeshape configuration is:

<?xml version="2.0" encoding="UTF-8"?>
<configuration xmlns:mode="http://www.modeshape.org/1.0" xmlns:jcr="http://www.jcp.org/jcr/1.0">
    <mode:repositories>
        <mode:repository jcr:name="repository" >
            <mode:source>federated</mode:source>
            <mode:options jcr:primaryType="options">
                <mode:option jcr:name="projectNodeTypes" mode:value="true"/>
                <mode:option jcr:name="jaasLoginConfigName" mode:value="modeshape"/>
                <mode:option jcr:name="queryIndexDirectory" mode:value="${jboss.server.data.dir}/modeshape/repositories/store/indexes"/>
                <mode:option jcr:name="queryIndexesUpdatedSynchronously" mode:value="true"/>
                <mode:option jcr:name="queryIndexesRebuiltSynchronously" mode:value="true"/>
                <mode:option jcr:name="rebuildQueryIndexOnStartup" mode:value="always"/>
            </mode:options>
        </mode:repository>
    </mode:repositories>

    <mode:sources jcr:primaryType="nt:unstructured">
        <mode:source jcr:name="infinispan" 
            mode:classname="org.modeshape.connector.infinispan.RemoteInfinispanSource" 
            mode:defaultWorkspaceName="default">
       </mode:source>
        <mode:source jcr:name="filesystem" 
            mode:classname="org.modeshape.connector.filesystem.FileSystemSource"
            mode:description="File System Source"
            mode:workspaceRootPath="/home/mcr/content"
            mode:defaultWorkspaceName="default"
            mode:creatingWorkspacesAllowed="false"
            mode:rootNodeUuid="a9bb5d79-f6c7-4bbc-a016-9453035b1b87"
            mode:updatesAllowed="true" 
            mode:exclusionPattern="^.*\.modeshape$"
            mode:extraPropertiesBehavior="store"/>
        <mode:source jcr:name="federated">
            <mode:classname>org.modeshape.graph.connector.federation.FederatedRepositorySource</mode:classname>
            <mode:workspaces>
                <mode:workspace jcr:name="default">
                    <mode:projections>
                    <mode:projection jcr:name="infinispan projection" mode:source="infinispan" mode:workspaceName="default">
                        <mode:projectionRules>/infinispan => /</mode:projectionRules>
                    </mode:projection>
                    <mode:projection jcr:name="filesystem projection" mode:source="filesystem" mode:workspaceName="default">
                        <mode:projectionRules>/filesystem => /</mode:projectionRules>
                    </mode:projection>
                    </mode:projections>
                </mode:workspace>
            </mode:workspaces>
        </mode:source>
    </mode:sources>
</configuration>

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This code produces the exception: node.setProperty( "prop" , (Value) null ); session.save(); The modeshape configuration is: <?xml version= "2.0" encoding= "UTF-8" ?> <configuration xmlns:mode = "http://www.modeshape.org/1.0" xmlns:jcr = "http://www.jcp.org/jcr/1.0" > <mode:repositories> <mode:repository jcr:name= "repository" > <mode:source> federated </mode:source> <mode:options jcr:primaryType= "options" > <mode:option jcr:name= "projectNodeTypes" mode:value= "true" /> <mode:option jcr:name= "jaasLoginConfigName" mode:value= "modeshape" /> <mode:option jcr:name= "queryIndexDirectory" mode:value= "${jboss.server.data.dir}/modeshape/repositories/store/indexes" /> <mode:option jcr:name= "queryIndexesUpdatedSynchronously" mode:value= "true" /> <mode:option jcr:name= "queryIndexesRebuiltSynchronously" mode:value= "true" /> <mode:option jcr:name= "rebuildQueryIndexOnStartup" mode:value= "always" /> </mode:options> </mode:repository> </mode:repositories> <mode:sources jcr:primaryType= "nt:unstructured" > <mode:source jcr:name= "infinispan" mode:classname= "org.modeshape.connector.infinispan.RemoteInfinispanSource" mode:defaultWorkspaceName= "default" > </mode:source> <mode:source jcr:name= "filesystem" mode:classname= "org.modeshape.connector.filesystem.FileSystemSource" mode:description= "File System Source" mode:workspaceRootPath= "/home/mcr/content" mode:defaultWorkspaceName= "default" mode:creatingWorkspacesAllowed= "false" mode:rootNodeUuid= "a9bb5d79-f6c7-4bbc-a016-9453035b1b87" mode:updatesAllowed= "true" mode:exclusionPattern= "^.*\.modeshape$" mode:extraPropertiesBehavior= "store" /> <mode:source jcr:name= "federated" > <mode:classname> org.modeshape.graph.connector.federation.FederatedRepositorySource </mode:classname> <mode:workspaces> <mode:workspace jcr:name= "default" > <mode:projections> <mode:projection jcr:name= "infinispan projection" mode:source= "infinispan" mode:workspaceName= "default" > <mode:projectionRules> /infinispan => / </mode:projectionRules> </mode:projection> <mode:projection jcr:name= "filesystem projection" mode:source= "filesystem" mode:workspaceName= "default" > <mode:projectionRules> /filesystem => / </mode:projectionRules> </mode:projection> </mode:projections> </mode:workspace> </mode:workspaces> </mode:source> </mode:sources> </configuration>

Forum Reference:
http://community.jboss.org/message/625302#625302
Git Pull Request:
https://github.com/ModeShape/modeshape/pull/187

When attempting to delete a property by setting it to null, Modeshape throws an exception when ModeShape is configured to use the federation connector:

Caused by: javax.jcr.RepositoryException: java.lang.ClassCastException: org.modeshape.graph.request.RemovePropertyRequest cannot be cast to org.modeshape.graph.request.SetPropertyRequest
    at org.modeshape.jcr.SessionCache.save(SessionCache.java:480)
    at org.modeshape.jcr.JcrSession.save(JcrSession.java:1309)
    at com.montanesolutions.mcr.component.NodeAction.deleteProperty(NodeAction.java:119)

Caused by: org.modeshape.graph.connector.RepositorySourceException: java.lang.ClassCastException: org.modeshape.graph.request.RemovePropertyRequest cannot be cast to org.modeshape.graph.request.SetPropertyRequest
    at org.modeshape.graph.session.GraphSession.save(GraphSession.java:1052)
    at org.modeshape.jcr.SessionCache.save(SessionCache.java:474)
    ... 88 more

Caused by: java.lang.ClassCastException: org.modeshape.graph.request.RemovePropertyRequest cannot be cast to org.modeshape.graph.request.SetPropertyRequest
    at org.modeshape.graph.connector.federation.JoinRequestProcessor.process(JoinRequestProcessor.java:924)
    at org.modeshape.graph.request.processor.RequestProcessor.process(RequestProcessor.java:303)
    at org.modeshape.graph.connector.federation.JoinRequestProcessor.process(JoinRequestProcessor.java:195)
    at org.modeshape.graph.connector.federation.JoinRequestProcessor.process(JoinRequestProcessor.java:145)
    at org.modeshape.graph.connector.federation.FederatedRepositoryConnection.execute(FederatedRepositoryConnection.java:225)
    at org.modeshape.graph.connector.RepositoryConnectionPool$ConnectionWrapper.execute(RepositoryConnectionPool.java:1129)
    at org.modeshape.graph.request.CompositeRequestChannel$2.call(CompositeRequestChannel.java:193)
    at org.modeshape.graph.request.CompositeRequestChannel$2.call(CompositeRequestChannel.java:183)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    ... 1 more

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