two oracle loaders in the same pipeline definition lead to an error

[bertvannuffelen]

Steps to reproduce:

1. create a pipeline with 2 uv-e-relationalFromSql connecting to the same database and extracting data from the same table
2. map the properties and merge the RDF.
3. execution throws exception on the second connection

kr,

Bert

2016-01-13 11:09:58,236 [dpu: oracle connection 2] ERROR exec:31 dpu:113 c.c.m.x.o.b.pipeline.event.PipelineFailedEvent - Pipeline failed on DPU 'oracle co
nnection 2' because of the exception
eu.unifiedviews.dpu.DPUException: DPU.innerExecute throws runtime exception.
at eu.unifiedviews.helpers.dpu.exec.AbstractDpu.execute(AbstractDpu.java:139) ~[uv-dpu-helpers-2.1.5-jar/:na]
at cz.cuni.mff.xrg.odcs.backend.execution.dpu.DPUExecutor.executeInstance(DPUExecutor.java:248) [backend-2.3.0-jar/:na]
at cz.cuni.mff.xrg.odcs.backend.execution.dpu.DPUExecutor.execute(DPUExecutor.java:386) [backend-2.3.0-jar/:na]
at cz.cuni.mff.xrg.odcs.backend.execution.dpu.DPUExecutor.run(DPUExecutor.java:468) [backend-2.3.0-jar/:na]
at java.lang.Thread.run(Thread.java:745) [na:1.7.0_91]
Caused by: java.lang.NullPointerException: null
at eu.unifiedviews.plugins.extractor.relationalfromsql.RelationalFromSql.innerExecute(RelationalFromSql.java:94) ~[na:na]
at eu.unifiedviews.helpers.dpu.exec.AbstractDpu.execute(AbstractDpu.java:133) ~[uv-dpu-helpers-2.1.5-jar/:na]
... 4 common frames omitted
2016-01-13 11:09:58,297 [dpu: oracle connection 2] INFO exec:31 dpu: cz.cuni.mff.xrg.odcs.backend.dpu.event.DPUEvent - DPU: 113 completed.