Marko A. Rodriguez created TINKERPOP-1307:
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Summary: NPE with OLTP nested group() in an OLAP group() traversal
Key: TINKERPOP-1307
URL: https://issues.apache.org/jira/browse/TINKERPOP-1307
Project: TinkerPop
Issue Type: Bug
Components: process
Affects Versions: 3.2.0-incubating
Reporter: Marko A. Rodriguez
{code}
graph = TinkerGraph.open()
graph.io(graphml()).readGraph('data/grateful-dead.xml')
g = graph.traversal().withComputer()
g.V().hasLabel('song').match(
__.as('songV').values('name').as('songName'),
__.as('songV').out('followedBy').as('followedV'),
__.as('followedV').values('name').as('followedName'),
__.as('followedV').out('sungBy').as('sungByV'),
__.as('sungByV').values('name').as('sungBy'),
__.as('followedV').out('writtenBy').as('writtenByV'),
__.as('writtenByV').values('name').as('writtenBy')
).select('songName','followedName','sungBy','writtenBy').
group().by(select('songName')).by(group().by(select('followedName')).by(select('sungBy').fold()))
{code}
The above causes an NPE. I know why -- potentially easy fix.
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