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java.lang.Throwable: null at org.openrdf.sail.helpers.AbstractSailConnection.close(AbstractSailConnection.java:241)[sesame-runtime-osgi-4.0.1-SNAPSHOT-custom.jar:na] at org.openrdf.repository.sail.SailRepositoryConnection.close(SailRepositoryConnection.java:206)[sesame-runtime-osgi-4.0.1-SNAPSHOT-custom.jar:na] at com.linkedpipes.etl.dataunit.sesame.ActionExecutor.execute(ActionExecutor.java:24)[dataunit-sesame-impl-0.0.0.jar:na] at com.linkedpipes.etl.dataunit.sesame.SesameDataUnitImpl.execute(SesameDataUnitImpl.java:63)[dataunit-sesame-impl-0.0.0.jar:na] at com.linkedpipes.etl.dataunit.sesame.SingleGraphDataUnitImpl.execute(SingleGraphDataUnitImpl.java:27)[dataunit-sesame-impl-0.0.0.jar:na] at com.linkedpipes.plugin.transformer.sparql.update.SparqlUpdate.execute(SparqlUpdate.java:47)[file?iri=http%3A%2F%2Fetl.linkedpipes.com%2Fresources%2Fjars%2Ft-sparqlUpdate%2F0.0.0:na] at com.linkedpipes.etl.component.api.impl.SimpleComponentImpl.execute(SimpleComponentImpl.java:292)[api-component-v1-impl-0.0.0.jar:na] at com.linkedpipes.etl.executor.component.ExecuteComponent.run(ExecuteComponent.java:123)[classes/:na] at java.lang.Thread.run(Thread.java:745)[na:1.8.0_92]