Hi Vanessa,
What is the query that cause this exception?
(I will wildly guess it involves a LET)
Andy
On 17/09/13 20:42, Vanessa Williams wrote:
Hello, we recently upgraded TDB from 0.9.4 to 0.10.1 because we needed a
nice fix in the latter. However now we are seeing errors such as these.
ERROR 2013-09-17 19:21:05.026 -
com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorCloseable -
QueryFatalException
com.hp.hpl.jena.sparql.ARQInternalErrorException: Attempt to reassign
'?observation' from '<
http://thoughtwire.ca/ontology/2012/08/rvhs/shiftObservation_22>' to '<
http://thoughtwire.ca/ontology/2012/08/rvhs/shiftObservation_22>'
at
com.hp.hpl.jena.sparql.engine.binding.BindingHashMap.checkAdd(BindingHashMap.java:111)
at
com.hp.hpl.jena.sparql.engine.binding.BindingHashMap.add(BindingHashMap.java:92)
at
com.hp.hpl.jena.sparql.engine.binding.BindingFactory.materialize(BindingFactory.java:60)
at
com.hp.hpl.jena.tdb.solver.QueryEngineTDB$QueryIteratorMaterializeBinding.moveToNextBinding(QueryEngineTDB.java:136)
at
com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.nextBinding(QueryIteratorBase.java:154)
at
com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorWrapper.moveToNextBinding(QueryIteratorWrapper.java:43)
at
com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.nextBinding(QueryIteratorBase.java:154)
at
com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.next(QueryIteratorBase.java:129)
at
com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.next(QueryIteratorBase.java:41)
at org.apache.jena.atlas.iterator.Iter$5.hasNext(Iter.java:335)
at
com.hp.hpl.jena.sparql.engine.QueryExecutionBase.execConstruct(QueryExecutionBase.java:228)
at
com.hp.hpl.jena.sparql.engine.QueryExecutionBase.execConstruct(QueryExecutionBase.java:204)
<...snip>
Can anyone shed any light on a possible cause? The error message is not
very informative. Note that the queries we're using haven't changed, and
neither has our code usage, only the TDB version has been altered.
Thanks in advance for any advice,
Vanessa
