[RYA-518] SPARQL queries using XPath string functions throw a NullPointerException

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.1

Environment

$ java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (build 1.8.0_212-b04)
OpenJDK 64-Bit Server VM (build 25.212-b04, mixed mode)

mongo -version
MongoDB shell version v4.0.10
git version: c389e7f69f637f7a1ac3cc9fae843b635f20b766
OpenSSL version: OpenSSL 1.0.2g 1 Mar 2016
allocator: tcmalloc
modules: none
build environment:
distmod: ubuntu1604
distarch: x86_64
target_arch: x86_64

• Assignee: Unassigned
• Reporter: Ryan Lantzy
• Created: 15/Jul/19 03:53
• Updated: 26/Nov/20 06:02
• Resolved: 26/Nov/20 06:02

Description

Whenever a SPARQL query is evaluated using org.apache.rya.rdftriplestore.RdfCloudTripleStoreConnection.evaluateInternal(TupleExpr, Dataset, BindingSet, boolean) and said query uses an XPath string function, IndexingFunctionRegistry throws a NullPointerException at line 78 when running Rya with MongoDB.

Sample query:

SELECT (strlen(?s) AS ?s_length)
WHERE

{     ?s ?p ?o . }

SPARQL string functions specification

https://www.w3.org/TR/sparql11-query/#func-strlen

XPath specification
https://www.w3.org/TR/xpath-functions/#string-value-functions

 

Issue Links

• links to: Pull Request 311 on GitHub