[SKG-IF] changed workflow parametrization to avoid OOM error

dump/src/main/resources/eu/dnetlib/dhp/oa/graph/dump/skgif/oozie_app/workflow.xml

@@ -201,14 +201,16 @@
             <class>eu.dnetlib.dhp.oa.graph.dump.filterentities.SelectConnectedEntities</class>
             <jar>dump-${projectVersion}.jar</jar>
             <spark-opts>
-                --executor-memory=${sparkExecutorMemory}
-                --executor-cores=${sparkExecutorCores}
+                --executor-cores=4
+                --executor-memory=4G
                 --driver-memory=${sparkDriverMemory}
+                --conf spark.executor.memoryOverhead=5G
                 --conf spark.extraListeners=${spark2ExtraListeners}
                 --conf spark.sql.queryExecutionListeners=${spark2SqlQueryExecutionListeners}
                 --conf spark.yarn.historyServer.address=${spark2YarnHistoryServerAddress}
                 --conf spark.eventLog.dir=${nameNode}${spark2EventLogDir}
                 --conf spark.sql.warehouse.dir=${sparkSqlWarehouseDir}
+                --conf spark.sql.shuffle.partitions=15000
             </spark-opts>
             <arg>--sourcePath</arg><arg>${sourcePath}</arg>
 <!--            <arg>&#45;&#45;workingDir</arg><arg>${workingDir}/graph/</arg>-->