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https://issues.apache.org/jira/browse/JCR-2433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12789200#action_12789200
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Stefan Guggisberg commented on JCR-2433:
----------------------------------------

ok, this is probably caused by a declaration change of the built-in node types 
in version 1.6.

is there any chance you can find out the PropertyId of the property causing the 
exception?
i guess you'd have to debug jackrabbit and place a NPE breakpoint.

> NPE when copying nodes with Workspace.copy()
> --------------------------------------------
>
>                 Key: JCR-2433
>                 URL: https://issues.apache.org/jira/browse/JCR-2433
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>          Components: jackrabbit-core
>    Affects Versions: 1.6.0
>            Reporter: Sascha Theves
>
> I get a NullpointerException when using Workspace.copy():
> java.lang.NullPointerException
> at 
> org.apache.jackrabbit.core.BatchedItemOperations.copyNodeState(BatchedItemOperations.java:1834)
> at 
> org.apache.jackrabbit.core.BatchedItemOperations.copyNodeState(BatchedItemOperations.java:1806)
> at 
> org.apache.jackrabbit.core.BatchedItemOperations.copyNodeState(BatchedItemOperations.java:1806)
> at 
> org.apache.jackrabbit.core.BatchedItemOperations.copy(BatchedItemOperations.java:423)
> at 
> org.apache.jackrabbit.core.WorkspaceImpl.internalCopy(WorkspaceImpl.java:444)
> at org.apache.jackrabbit.core.WorkspaceImpl.copy(WorkspaceImpl.java:666)
> at xxx.MyClass.myMeth(MyClass.java)
> It seems that it happens not all the time. The error occurs since we use 
> Jackrabbit 1.6.0. We do not get the error with previous versions. It seems 
> that we only get the error when trying to copy nodes that were created with 
> Jackrabbit 1.4 and copied with Jackrabbit 1.6.

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