[JENA-1773] TDB2: Duplicate prefixes in the data+query cause warning and exception in CONSTRUCT query.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Jena 3.13.1
• Fix Version/s: Jena 3.14.0
• Component/s: TDB2
• Assignee: Andy Seaborne
• Reporter: Andy Seaborne
• Created: 23/Oct/19 15:53
• Updated: 19/Jan/20 18:18
• Resolved: 26/Oct/19 17:31

Description

Report on users@jena (23/Oct)

Reproduced with:

  rm -rf DB2
  tdb2.tdbloader --loc DB2 D-prefix.ttl
  tdb2.tdbquery --loc DB2 @Q-prefix.rq

to give:

WARN  Exception in insertPrefixes: Duplicate key ex (attempted merging values http://example/ns1# and http://example/ns2/)
java.lang.IllegalStateException: Duplicate key ex (attempted merging values http://example/ns1# and http://example/ns2/)
	at java.base/java.util.stream.Collectors.duplicateKeyException(Collectors.java:133)
	at java.base/java.util.stream.Collectors.lambda$uniqKeysMapAccumulator$1(Collectors.java:180)
	at java.base/java.util.stream.ReduceOps$3ReducingSink.accept(ReduceOps.java:169)
	at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
	at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
	at org.apache.jena.dboe.storage.prefixes.PrefixMapBase.getMappingCopy(PrefixMapBase.java:44)
	at org.apache.jena.dboe.storage.prefixes.PrefixMappingOverPrefixMapI.getNsPrefixMap(PrefixMappingOverPrefixMapI.java:97)
	at org.apache.jena.rdf.model.impl.ModelCom.getNsPrefixMap(ModelCom.java:1083)
	at org.apache.jena.shared.impl.PrefixMappingImpl.setNsPrefixes(PrefixMappingImpl.java:138)
	at org.apache.jena.rdf.model.impl.ModelCom.setNsPrefixes(ModelCom.java:1055)
	at org.apache.jena.sparql.engine.QueryExecutionBase.insertPrefixesInto(QueryExecutionBase.java:611)
	at org.apache.jena.sparql.engine.QueryExecutionBase.execConstruct(QueryExecutionBase.java:217)
	at org.apache.jena.sparql.engine.QueryExecutionBase.execConstruct(QueryExecutionBase.java:207)
	at org.apache.jena.sparql.util.QueryExecUtils.doConstructQuery(QueryExecUtils.java:162)
	at org.apache.jena.sparql.util.QueryExecUtils.executeQuery(QueryExecUtils.java:83)
	at arq.query.lambda$0(query.java:225)
	at org.apache.jena.system.Txn.exec(Txn.java:77)
	at org.apache.jena.system.Txn.executeRead(Txn.java:115)
	at arq.query.queryExec(query.java:222)
	at arq.query.exec(query.java:153)
	at jena.cmd.CmdMain.mainMethod(CmdMain.java:93)
	at jena.cmd.CmdMain.mainRun(CmdMain.java:58)
	at jena.cmd.CmdMain.mainRun(CmdMain.java:45)
	at tdb2.tdbquery.main(tdbquery.java:30)

Issue Links

• links to: GitHub Pull Request #624
• links to: GitHub Pull Request #625