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ODCleanStore
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Extractor problem .. #670

Closed skodapetr closed 11 years ago

skodapetr commented 11 years ago

When I use dbPedia pipeline and set SPARQL Extractor "Extraction failed if there is no triples" .. the execution failed with exception - DPUs should use context.sendMessage(Error .. otherwise backedn print stack trace which is not desired .. Also the exception does not give a reason .. why there are no triples?

2013-10-17 20:58:28,123 [Thread-8] DEBUG exec:117 dpu:1 c.c.m.x.o.e.rdf.RDFExtractor - RDFDataUnitException
cz.cuni.mff.xrg.odcs.rdf.exceptions.RDFException: No extracted triples from SPARQL endpoint
    at cz.cuni.mff.xrg.odcs.rdf.impl.BaseRDFRepo.caseNoTriples(BaseRDFRepo.java:1047) ~[classes/:na]
    at cz.cuni.mff.xrg.odcs.rdf.impl.BaseRDFRepo.extractFromSPARQLEndpoint(BaseRDFRepo.java:960) ~[classes/:na]
    at cz.cuni.mff.xrg.odcs.extractor.rdf.RDFExtractor.execute(RDFExtractor.java:65) ~[na:na]
    at cz.cuni.mff.xrg.odcs.backend.execution.dpu.Executor.executeInstance(Executor.java:217) [classes/:na]
    at cz.cuni.mff.xrg.odcs.backend.execution.dpu.Executor.execute(Executor.java:323) [classes/:na]
    at cz.cuni.mff.xrg.odcs.backend.execution.dpu.Executor.run(Executor.java:393) [classes/:na]
    at java.lang.Thread.run(Thread.java:722) [na:1.7.0_17]
2013-10-17 20:58:28,241 [Thread-8] ERROR exec:117 dpu:1 c.c.m.x.o.b.p.e.PipelineFailedEvent - Pipeline failed on DPU 'SPARQL DBPedia' because of the exception
cz.cuni.mff.xrg.odcs.commons.dpu.DPUException: No extracted triples from SPARQL endpoint
    at cz.cuni.mff.xrg.odcs.extractor.rdf.RDFExtractor.execute(RDFExtractor.java:76) ~[na:na]
    at cz.cuni.mff.xrg.odcs.backend.execution.dpu.Executor.executeInstance(Executor.java:217) [classes/:na]
    at cz.cuni.mff.xrg.odcs.backend.execution.dpu.Executor.execute(Executor.java:323) [classes/:na]
    at cz.cuni.mff.xrg.odcs.backend.execution.dpu.Executor.run(Executor.java:393) [classes/:na]
    at java.lang.Thread.run(Thread.java:722) [na:1.7.0_17]
Caused by: cz.cuni.mff.xrg.odcs.rdf.exceptions.RDFException: No extracted triples from SPARQL endpoint
    at cz.cuni.mff.xrg.odcs.rdf.impl.BaseRDFRepo.caseNoTriples(BaseRDFRepo.java:1047) ~[classes/:na]
    at cz.cuni.mff.xrg.odcs.rdf.impl.BaseRDFRepo.extractFromSPARQLEndpoint(BaseRDFRepo.java:960) ~[classes/:na]
    at cz.cuni.mff.xrg.odcs.extractor.rdf.RDFExtractor.execute(RDFExtractor.java:65) ~[na:na]
    ... 4 common frames omitted
2013-10-17 20:58:28,539 [Thread-8] INFO  exec:117 dpu:1 c.c.m.x.o.b.dpu.event.DPUEvent - DPU 'SPARQL DBPedia' finished
tomesj commented 11 years ago

So if I understand, just add calling context.sendMessage(...)

skodapetr commented 11 years ago

Instead of rethrow DPUException(RDFException), yes.

And question at the very end .. is there possibility to find out .. why there have not been any triples extracted?

tomesj commented 11 years ago

No - cause of why I can not find out. I can know only result - no triples extracted.

So I add context.sendMessage(...)

And throw RDFException - fail (as specification)