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Transient NullPointerException thrown on query #8239

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rationalism opened this issue Oct 21, 2016 · 1 comment
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Transient NullPointerException thrown on query #8239

rationalism opened this issue Oct 21, 2016 · 1 comment
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3.0 bug cypher

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@rationalism
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rationalism commented Oct 21, 2016 •
edited by spacecowboy

  • Neo4j version: 3.0.5 Enterprise
  • Operating system: Ubuntu 14.04.4 LTS
  • API/Driver: neo4j-java-driver 1.0.5

The query

MATCH (root:`norecon`) RETURN labels(root), count(*)

threw a DatabaseException/NullPointerException for unknown reasons. This appears to be a transient error, so it might be harmless, but I figured I'd report it anyway just in case. Here's the stack trace in debug.log:

https://gist.github.com/rationalism/031a7f010e43eccc13f5a0e0ed3faaa3
@spacecowboy
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Thank you for the report. NullPointerExceptions are always considered bugs.

@pontusmelke pontusmelke mentioned this issue Oct 25, 2016
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@systay systay closed this as completed in c429f3f Oct 26, 2016
digitalstain pushed a commit to mneedham/neo4j that referenced this issue Oct 26, 2016
@pontusmelke @digitalstain
Don't throw NullPointerException in LabelsFunction
32749d9 
If the node is deleted at the same time as we are trying to access the labels
of that node there is a significant risk that we will have a `NullPointerException`.
Instead of an error we should just return an empty iterator for that case.

Fixes neo4j#8239
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@spacecowboy @rationalism