Null pointer exception on Edge without a data node

[pjljvandelaar]

Original submitted as https://github.com/neo4j/neo4j/issues/12544 Neo4j asked to submit here since is apoc issue.

Version Info

• Neo4j Desktop version: 1.29
• Neo4j version: 4.1.0
• Operating system: Windows 10 (64 bits)
• APOC: 4.1.0.0

Steps to reproduce

1. Add a new database.
2. Install the APOC plug-in
3. Add to settings

   dbms.security.procedures.unrestricted=apoc.import.* 
   apoc.import.file.enabled=true

4. Create File "test.graphml" in directory C:\Users\<name>\.Neo4jDesktop\neo4jDatabases\database-<id>\installation-<neo4j-version>\import\ with content

   <?xml version="1.0" encoding="utf-8"?>
   <graphml xmlns="http://graphml.graphdrawing.org/xmlns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" schemaLocation="http://graphml.graphdrawing.org/xmlns http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd">
   <key id="Node.Path" for="node" attr.name="Path" attr.type="string"/>
   <key id="Edge.Path" for="edge" attr.name="Path" attr.type="string"/>
   <graph id="Nexperia" edgedefault="directed">
       <node id="A" labels=":Unit">
           <data key="Path">C:\bright\itecembed\obj\ada\a3_status.ads</data>
       </node>
       <node id="B" labels=":Unit">
           <data key="Path">C:\bright\itecembed\obj\ada\b3_status.ads</data>
       </node>
       <edge source="A" target="B">
           <!-- <data key="Path">C:\bright\itecembed\obj\ada\b3_status.ads</data> -->
       </edge>
   </graph>
   </graphml>

5. Load file into database with

   CALL apoc.import.graphml("test.graphml",{batchSize: 10000, readLabels: true, storeNodeIds: false, defaultRelationshipType:"RELATED"}) YIELD file, source, format, nodes, relationships, properties, time

   Expected behavior

   File to be loaded. Yed and XmlChecker all agree it is a fine file.

Actual behavior

Null pointer exception is thrown.

Notes

adding the node (by removing the comment tags) on line 13, results in the expected behaviour.

[vga91]

Closed via f292b48d9b881add585b8a9c6276c40e2e6938e0