return empty Oaf list if record cannot be parsed

dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/raw/AbstractMdRecordToOafMapper.java

@@ -143,7 +143,7 @@ public abstract class AbstractMdRecordToOafMapper {
 			return createOafs(doc, type, instances, collectedFrom, info, lastUpdateTimestamp);
 		} catch (DocumentException e) {
 			log.error("Error with record:\n" + xml);
-			throw e;
+			return Lists.newArrayList();
 		}
 	}
 

dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/raw/MappersTest.java

@@ -931,11 +931,8 @@ class MappersTest {
 	void testNotWellFormed() throws IOException, DocumentException {
 		final String xml = IOUtils
 			.toString(Objects.requireNonNull(getClass().getResourceAsStream("oaf_notwellformed.xml")));
-		final DocumentException generalEx = new DocumentException();
+		assertEquals(0, new OafToOafMapper(vocs, false, true).processMdRecord(xml).size());
 
-		DocumentException exception = assertThrows(DocumentException.class, () -> {
-			new OafToOafMapper(vocs, false, true).processMdRecord(xml);
-		});
 	}
 
 	private void assertValidId(final String id) {