[jira] [Assigned] (OAK-9660) NullPointerException When Moving Transient node

["Marcel Reutegger (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OAK-9660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marcel Reutegger reassigned OAK-9660:
-------------------------------------

    Assignee: Marcel Reutegger

> NullPointerException When Moving Transient node
> -----------------------------------------------
>
>                 Key: OAK-9660
>                 URL: https://issues.apache.org/jira/browse/OAK-9660
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.8.8, 1.40.0
>            Reporter: Bryan Stopp
>            Assignee: Marcel Reutegger
>            Priority: Major
>
> When a node is moved in a uncommitted Session1 (S), that was previously moved in a closed/committed Session0 (S'), any transient children nodes that are moved throw NPEs in the node memory manager tracking the uncommitted state.
>  
> Steps to reproduce:
>  # Start Sling docker container
>  ## ` docker run -p 8080:8080 apache/sling`
>  # Install [demo project|https://github.com/bstopp/oak-move-bug] 
>  # Disable administrative login security, or create a rule for the servlet.
>  # Navigate to the [Demo servlet|http://localhost:8080/bin/bug/test]
>  
> The servlet will catch the NPE and display it. The error occurs [here|https://github.com/apache/jackrabbit-oak/blob/74a1a686635be76b74abd57ebc0ef1dd4bb44889/oak-store-spi/src/main/java/org/apache/jackrabbit/oak/plugins/memory/MemoryNodeBuilder.java#L449]. `base` is not null, but `head` is.
> It seems that the `base` look up finds the segment metadata from Session0 (S') that has been dispatched (before the current session was created), and not recognizing that the parent is now a transient node in Session1 (S).



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