diff --git a/dhp-common/pom.xml b/dhp-common/pom.xml
index 6e656034bf..ec7c14e906 100644
--- a/dhp-common/pom.xml
+++ b/dhp-common/pom.xml
@@ -52,6 +52,8 @@
 					</execution>
 				</executions>
 				<configuration>
+					<failOnMultipleScalaVersions>true</failOnMultipleScalaVersions>
+					<scalaCompatVersion>${scala.binary.version}</scalaCompatVersion>
 					<scalaVersion>${scala.version}</scalaVersion>
 				</configuration>
 			</plugin>
@@ -76,11 +78,11 @@
 
 		<dependency>
 			<groupId>org.apache.spark</groupId>
-			<artifactId>spark-core_2.11</artifactId>
+			<artifactId>spark-core_${scala.binary.version}</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.apache.spark</groupId>
-			<artifactId>spark-sql_2.11</artifactId>
+			<artifactId>spark-sql_${scala.binary.version}</artifactId>
 		</dependency>
 
 		<dependency>
@@ -159,7 +161,7 @@
 
 		<dependency>
 			<groupId>eu.dnetlib.dhp</groupId>
-			<artifactId>dhp-schemas</artifactId>
+			<artifactId>dhp-schemas_${scala.binary.version}</artifactId>
 		</dependency>
 
 		<dependency>
diff --git a/dhp-pace-core/pom.xml b/dhp-pace-core/pom.xml
index fac087ac70..a2525128bb 100644
--- a/dhp-pace-core/pom.xml
+++ b/dhp-pace-core/pom.xml
@@ -20,7 +20,7 @@
 			<plugin>
 				<groupId>net.alchim31.maven</groupId>
 				<artifactId>scala-maven-plugin</artifactId>
-				<version>4.0.1</version>
+				<version>${net.alchim31.maven.version}</version>
 				<executions>
 					<execution>
 						<id>scala-compile-first</id>
@@ -39,8 +39,9 @@
 					</execution>
 				</executions>
 				<configuration>
+					<failOnMultipleScalaVersions>true</failOnMultipleScalaVersions>
+					<scalaCompatVersion>${scala.binary.version}</scalaCompatVersion>
 					<scalaVersion>${scala.version}</scalaVersion>
-					<addScalacArgs>-target:jvm-1.8</addScalacArgs>
 				</configuration>
 			</plugin>
 		</plugins>
@@ -98,11 +99,11 @@
 		</dependency>
 		<dependency>
 			<groupId>org.apache.spark</groupId>
-			<artifactId>spark-core_2.11</artifactId>
+			<artifactId>spark-core_${scala.binary.version}</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.apache.spark</groupId>
-			<artifactId>spark-sql_2.11</artifactId>
+			<artifactId>spark-sql_${scala.binary.version}</artifactId>
 		</dependency>
 	</dependencies>
 
diff --git a/dhp-workflows/dhp-actionmanager/pom.xml b/dhp-workflows/dhp-actionmanager/pom.xml
index 87126920ba..13ffe8b180 100644
--- a/dhp-workflows/dhp-actionmanager/pom.xml
+++ b/dhp-workflows/dhp-actionmanager/pom.xml
@@ -11,12 +11,12 @@
     <dependencies>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-core_2.11</artifactId>
+            <artifactId>spark-core_${scala.binary.version}</artifactId>
         </dependency>
 
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-sql_2.11</artifactId>
+            <artifactId>spark-sql_${scala.binary.version}</artifactId>
         </dependency>
 
         <dependency>
diff --git a/dhp-workflows/dhp-aggregation/pom.xml b/dhp-workflows/dhp-aggregation/pom.xml
index 53d349d2a1..acd04901d7 100644
--- a/dhp-workflows/dhp-aggregation/pom.xml
+++ b/dhp-workflows/dhp-aggregation/pom.xml
@@ -38,6 +38,8 @@
                     </execution>
                 </executions>
                 <configuration>
+                    <failOnMultipleScalaVersions>true</failOnMultipleScalaVersions>
+                    <scalaCompatVersion>${scala.binary.version}</scalaCompatVersion>
                     <scalaVersion>${scala.version}</scalaVersion>
                 </configuration>
             </plugin>
@@ -54,11 +56,11 @@
 
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-core_2.11</artifactId>
+            <artifactId>spark-core_${scala.binary.version}</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-sql_2.11</artifactId>
+            <artifactId>spark-sql_${scala.binary.version}</artifactId>
         </dependency>
 
         <dependency>
diff --git a/dhp-workflows/dhp-blacklist/pom.xml b/dhp-workflows/dhp-blacklist/pom.xml
index 479a9e8c63..7ecc8b35d2 100644
--- a/dhp-workflows/dhp-blacklist/pom.xml
+++ b/dhp-workflows/dhp-blacklist/pom.xml
@@ -16,11 +16,11 @@
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-core_2.11</artifactId>
+            <artifactId>spark-core_${scala.binary.version}</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-sql_2.11</artifactId>
+            <artifactId>spark-sql_${scala.binary.version}</artifactId>
         </dependency>
     </dependencies>
 
diff --git a/dhp-workflows/dhp-broker-events/pom.xml b/dhp-workflows/dhp-broker-events/pom.xml
index 01f1ea3211..322fc7e93d 100644
--- a/dhp-workflows/dhp-broker-events/pom.xml
+++ b/dhp-workflows/dhp-broker-events/pom.xml
@@ -18,11 +18,11 @@
 
 		<dependency>
 			<groupId>org.apache.spark</groupId>
-			<artifactId>spark-core_2.11</artifactId>
+			<artifactId>spark-core_${scala.binary.version}</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.apache.spark</groupId>
-			<artifactId>spark-sql_2.11</artifactId>
+			<artifactId>spark-sql_${scala.binary.version}</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.elasticsearch</groupId>
diff --git a/dhp-workflows/dhp-dedup-openaire/pom.xml b/dhp-workflows/dhp-dedup-openaire/pom.xml
index 750cc70281..1cadae4608 100644
--- a/dhp-workflows/dhp-dedup-openaire/pom.xml
+++ b/dhp-workflows/dhp-dedup-openaire/pom.xml
@@ -13,7 +13,7 @@
     	     <plugin>
                 <groupId>net.alchim31.maven</groupId>
                 <artifactId>scala-maven-plugin</artifactId>
-                <version>4.0.1</version>
+                <version>${net.alchim31.maven.version}</version>
                 <executions>
                     <execution>
                         <id>scala-compile-first</id>
@@ -32,8 +32,9 @@
                     </execution>
                 </executions>
                 <configuration>
+                    <failOnMultipleScalaVersions>true</failOnMultipleScalaVersions>
+                    <scalaCompatVersion>${scala.binary.version}</scalaCompatVersion>
                     <scalaVersion>${scala.version}</scalaVersion>
-                    <addScalacArgs>-target:jvm-1.8</addScalacArgs>
                 </configuration>
             </plugin>
     	</plugins>
@@ -58,38 +59,67 @@
             <groupId>eu.dnetlib.dhp</groupId>
             <artifactId>dhp-common</artifactId>
             <version>${project.version}</version>
+            <exclusions>
+                <exclusion>
+                    <artifactId>log4j</artifactId>
+                    <groupId>log4j</groupId>
+                </exclusion>
+                <exclusion>
+                    <artifactId>annotations</artifactId>
+                    <groupId>org.jetbrains</groupId>
+                </exclusion>
+                <exclusion>
+                    <artifactId>slf4j-api</artifactId>
+                    <groupId>org.slf4j</groupId>
+                </exclusion>
+            </exclusions>
         </dependency>
 
         <dependency>
             <groupId>eu.dnetlib.dhp</groupId>
             <artifactId>dhp-pace-core</artifactId>
             <version>${project.version}</version>
+            <exclusions>
+                <exclusion>
+                    <artifactId>jsr305</artifactId>
+                    <groupId>com.google.code.findbugs</groupId>
+                </exclusion>
+                <exclusion>
+                    <artifactId>javassist</artifactId>
+                    <groupId>org.javassist</groupId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
         </dependency>
 
         <dependency>
             <groupId>org.scala-lang.modules</groupId>
-            <artifactId>scala-java8-compat_2.11</artifactId>
+            <artifactId>scala-java8-compat_${scala.binary.version}</artifactId>
             <version>1.0.2</version>
         </dependency>
 
         <dependency>
             <groupId>org.scala-lang.modules</groupId>
-            <artifactId>scala-collection-compat_2.11</artifactId>
-            <version>2.8.0</version>
+            <artifactId>scala-collection-compat_${scala.binary.version}</artifactId>
+            <version>2.11.0</version>
         </dependency>
 
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-core_2.11</artifactId>
+            <artifactId>spark-core_${scala.binary.version}</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-sql_2.11</artifactId>
+            <artifactId>spark-sql_${scala.binary.version}</artifactId>
         </dependency>
 
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-graphx_2.11</artifactId>
+            <artifactId>spark-graphx_${scala.binary.version}</artifactId>
         </dependency>
 
         <dependency>
@@ -107,12 +137,6 @@
             <artifactId>jaxen</artifactId>
         </dependency>
 
-        <dependency>
-            <groupId>com.influxdb</groupId>
-            <artifactId>influxdb-client-java</artifactId>
-            <version>3.1.0</version>
-        </dependency>
-
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
diff --git a/dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/SparkSimRelsAnalytics.java b/dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/SparkSimRelsAnalytics.java
new file mode 100644
index 0000000000..18f8dd92d7
--- /dev/null
+++ b/dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/SparkSimRelsAnalytics.java
@@ -0,0 +1,118 @@
+
+package eu.dnetlib.dhp.oa.dedup;
+
+import java.io.IOException;
+import java.util.Optional;
+
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.api.java.function.MapFunction;
+import org.apache.spark.sql.*;
+import org.dom4j.DocumentException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.xml.sax.SAXException;
+
+import eu.dnetlib.dhp.application.ArgumentApplicationParser;
+import eu.dnetlib.dhp.application.dedup.log.DedupLogModel;
+import eu.dnetlib.dhp.application.dedup.log.DedupLogWriter;
+import eu.dnetlib.dhp.schema.oaf.Relation;
+import eu.dnetlib.dhp.utils.ISLookupClientFactory;
+import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpException;
+import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpService;
+import eu.dnetlib.pace.config.DedupConfig;
+import eu.dnetlib.pace.model.SparkDedupConfig;
+
+public class SparkSimRelsAnalytics extends AbstractSparkAction {
+
+	private static final Logger log = LoggerFactory.getLogger(SparkSimRelsAnalytics.class);
+
+	public SparkSimRelsAnalytics(ArgumentApplicationParser parser, SparkSession spark) {
+		super(parser, spark);
+		spark.sparkContext().setLogLevel("WARN");
+	}
+
+	public static void main(String[] args) throws Exception {
+		ArgumentApplicationParser parser = new ArgumentApplicationParser(
+			IOUtils
+				.toString(
+					SparkSimRelsAnalytics.class
+						.getResourceAsStream(
+							"/eu/dnetlib/dhp/oa/dedup/createSimRels_parameters.json")));
+		parser.parseArgument(args);
+
+		SparkConf conf = new SparkConf();
+		new SparkSimRelsAnalytics(parser, getSparkSession(conf))
+			.run(ISLookupClientFactory.getLookUpService(parser.get("isLookUpUrl")));
+	}
+
+	@Override
+	public void run(ISLookUpService isLookUpService)
+		throws DocumentException, IOException, ISLookUpException, SAXException {
+
+		// read oozie parameters
+		final String graphBasePath = parser.get("graphBasePath");
+		final String isLookUpUrl = parser.get("isLookUpUrl");
+		final String actionSetId = parser.get("actionSetId");
+		final String workingPath = parser.get("workingPath");
+		final int numPartitions = Optional
+			.ofNullable(parser.get("numPartitions"))
+			.map(Integer::valueOf)
+			.orElse(NUM_PARTITIONS);
+
+		log.info("numPartitions: '{}'", numPartitions);
+		log.info("graphBasePath: '{}'", graphBasePath);
+		log.info("isLookUpUrl:   '{}'", isLookUpUrl);
+		log.info("actionSetId:   '{}'", actionSetId);
+		log.info("workingPath:   '{}'", workingPath);
+
+		final String dfLogPath = parser.get("dataframeLog");
+		final String runTag = Optional.ofNullable(parser.get("runTAG")).orElse("UNKNOWN");
+
+		// for each dedup configuration
+		for (DedupConfig dedupConf : getConfigurations(isLookUpService, actionSetId)) {
+			final long start = System.currentTimeMillis();
+
+			final String entity = dedupConf.getWf().getEntityType();
+			final String subEntity = dedupConf.getWf().getSubEntityValue();
+			log.info("Creating simrels for: '{}'", subEntity);
+
+			final String outputPath = DedupUtility.createSimRelPath(workingPath, actionSetId, subEntity);
+			removeOutputDir(spark, outputPath);
+
+			JavaSparkContext sc = JavaSparkContext.fromSparkContext(spark.sparkContext());
+
+			SparkDedupConfig sparkConfig = new SparkDedupConfig(dedupConf, numPartitions);
+
+			spark.udf().register("collect_sort_slice", sparkConfig.collectSortSliceUDAF());
+
+			Dataset<?> simRels = spark
+				.read()
+				.textFile(DedupUtility.createEntityPath(graphBasePath, subEntity))
+				.transform(sparkConfig.modelExtractor()) // Extract fields from input json column according to model
+				// definition
+				.transform(sparkConfig.generateClustersWithWindows()) // generate <key,block> pairs according to
+				// filters, clusters, and model
+				// definition
+				.transform(sparkConfig.processClusters()) // process blocks and emits <from,to> pairs of found
+				// similarities
+				.map(
+					(MapFunction<Row, Relation>) t -> DedupUtility
+						.createSimRel(t.getStruct(0).getString(0), t.getStruct(0).getString(1), entity),
+					Encoders.bean(Relation.class));
+
+			saveParquet(simRels, outputPath, SaveMode.Overwrite);
+			final long end = System.currentTimeMillis();
+			if (StringUtils.isNotBlank(dfLogPath)) {
+				final DedupLogModel model = new DedupLogModel(runTag, dedupConf.toString(), subEntity, start, end,
+					end - start);
+				new DedupLogWriter(dfLogPath).appendLog(model, spark);
+
+			}
+
+		}
+	}
+
+}
diff --git a/dhp-workflows/dhp-dedup-openaire/src/main/resources/eu/dnetlib/dhp/oa/dedup/scan/oozie_app/config-default.xml b/dhp-workflows/dhp-dedup-openaire/src/main/resources/eu/dnetlib/dhp/oa/dedup/scan/oozie_app/config-default.xml
index 2e0ed9aeea..862f568c96 100644
--- a/dhp-workflows/dhp-dedup-openaire/src/main/resources/eu/dnetlib/dhp/oa/dedup/scan/oozie_app/config-default.xml
+++ b/dhp-workflows/dhp-dedup-openaire/src/main/resources/eu/dnetlib/dhp/oa/dedup/scan/oozie_app/config-default.xml
@@ -13,6 +13,6 @@
     </property>
     <property>
         <name>oozie.action.sharelib.for.spark</name>
-        <value>spark2</value>
+        <value>spark342</value>
     </property>
 </configuration>
\ No newline at end of file
diff --git a/dhp-workflows/dhp-dedup-openaire/src/main/resources/eu/dnetlib/dhp/oa/dedup/scan/oozie_app/workflow.xml b/dhp-workflows/dhp-dedup-openaire/src/main/resources/eu/dnetlib/dhp/oa/dedup/scan/oozie_app/workflow.xml
index ba2270c8a8..4fd1990b4d 100644
--- a/dhp-workflows/dhp-dedup-openaire/src/main/resources/eu/dnetlib/dhp/oa/dedup/scan/oozie_app/workflow.xml
+++ b/dhp-workflows/dhp-dedup-openaire/src/main/resources/eu/dnetlib/dhp/oa/dedup/scan/oozie_app/workflow.xml
@@ -126,15 +126,25 @@
                 --conf spark.sql.queryExecutionListeners=${spark2SqlQueryExecutionListeners}
                 --conf spark.yarn.historyServer.address=${spark2YarnHistoryServerAddress}
                 --conf spark.eventLog.dir=${nameNode}${spark2EventLogDir}
-                --conf spark.sql.shuffle.partitions=15000
+                --conf spark.sql.shuffle.partitions=5000
+                --conf spark.driver.extraJavaOptions="-Xss256k"
+                --conf spark.executor.extraJavaOptions="-Dlog4j.configuration=spark-log4j.properties -Xss256k"
+                --conf spark.extraListeners=
+                --conf spark.sql.queryExecutionListeners=
+                --conf spark.dynamicAllocation.enabled=true --conf spark.dynamicAllocation.minExecutors=100 --conf spark.dynamicAllocation.shuffleTracking.enabled=true
+                --conf spark.network.io.preferDirectBufs=true --conf spark.memory.fraction=0.4 --conf spark.sql.adaptive.coalescePartitions.minPartitionNum=5000
+                --conf spark.shuffle.useOldFetchProtocol=true --conf spark.shuffle.service.enabled=true  --conf spark.eventLog.enabled=true
+                --conf spark.executor.heartbeatInterval=60s
+                --conf spark.network.timeout=640s
+                --conf spark.sql.legacy.allowUntypedScalaUDF=true
             </spark-opts>
             <arg>--graphBasePath</arg><arg>${graphBasePath}</arg>
             <arg>--isLookUpUrl</arg><arg>${isLookUpUrl}</arg>
             <arg>--actionSetId</arg><arg>${actionSetId}</arg>
             <arg>--workingPath</arg><arg>${workingPath}</arg>
-            <arg>--numPartitions</arg><arg>15000</arg>
+            <arg>--numPartitions</arg><arg>5000</arg>
         </spark>
-        <ok to="WhitelistSimRels"/>
+        <ok to="End"/>
         <error to="Kill"/>
     </action>
 
diff --git a/dhp-workflows/dhp-dedup-openaire/src/test/java/eu/dnetlib/dhp/oa/dedup/SparkDedupTest.java b/dhp-workflows/dhp-dedup-openaire/src/test/java/eu/dnetlib/dhp/oa/dedup/SparkDedupTest.java
index ef7cc656cf..00c9d5f27b 100644
--- a/dhp-workflows/dhp-dedup-openaire/src/test/java/eu/dnetlib/dhp/oa/dedup/SparkDedupTest.java
+++ b/dhp-workflows/dhp-dedup-openaire/src/test/java/eu/dnetlib/dhp/oa/dedup/SparkDedupTest.java
@@ -95,6 +95,7 @@ public class SparkDedupTest implements Serializable {
 
 		final SparkConf conf = new SparkConf();
 		conf.set("spark.sql.shuffle.partitions", "200");
+		conf.set("spark.sql.legacy.allowUntypedScalaUDF", "true");
 		spark = SparkSession
 			.builder()
 			.appName(SparkDedupTest.class.getSimpleName())
diff --git a/dhp-workflows/dhp-doiboost/pom.xml b/dhp-workflows/dhp-doiboost/pom.xml
index 37accbc4f5..6e8911fbab 100644
--- a/dhp-workflows/dhp-doiboost/pom.xml
+++ b/dhp-workflows/dhp-doiboost/pom.xml
@@ -33,6 +33,8 @@
                     </execution>
                 </executions>
                 <configuration>
+                    <failOnMultipleScalaVersions>true</failOnMultipleScalaVersions>
+                    <scalaCompatVersion>${scala.binary.version}</scalaCompatVersion>
                     <scalaVersion>${scala.version}</scalaVersion>
                 </configuration>
             </plugin>
@@ -70,12 +72,12 @@
 
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-core_2.11</artifactId>
+            <artifactId>spark-core_${scala.binary.version}</artifactId>
         </dependency>
 
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-sql_2.11</artifactId>
+            <artifactId>spark-sql_${scala.binary.version}</artifactId>
         </dependency>
 
         <dependency>
diff --git a/dhp-workflows/dhp-enrichment/pom.xml b/dhp-workflows/dhp-enrichment/pom.xml
index 591cad252c..9698dee03c 100644
--- a/dhp-workflows/dhp-enrichment/pom.xml
+++ b/dhp-workflows/dhp-enrichment/pom.xml
@@ -12,11 +12,11 @@
 
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-core_2.11</artifactId>
+            <artifactId>spark-core_${scala.binary.version}</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-sql_2.11</artifactId>
+            <artifactId>spark-sql_${scala.binary.version}</artifactId>
         </dependency>
 
         <dependency>
@@ -27,7 +27,7 @@
 
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-hive_2.11</artifactId>
+            <artifactId>spark-hive_${scala.binary.version}</artifactId>
             <scope>test</scope>
         </dependency>
 
diff --git a/dhp-workflows/dhp-graph-mapper/pom.xml b/dhp-workflows/dhp-graph-mapper/pom.xml
index f579a7d2bf..ef35951c00 100644
--- a/dhp-workflows/dhp-graph-mapper/pom.xml
+++ b/dhp-workflows/dhp-graph-mapper/pom.xml
@@ -14,7 +14,7 @@
             <plugin>
                 <groupId>net.alchim31.maven</groupId>
                 <artifactId>scala-maven-plugin</artifactId>
-                <version>4.0.1</version>
+                <version>${net.alchim31.maven.version}</version>
                 <executions>
                     <execution>
                         <id>scala-compile-first</id>
@@ -37,6 +37,8 @@
                         <arg>-Xmax-classfile-name</arg>
                         <arg>200</arg>
                     </args>
+                    <failOnMultipleScalaVersions>true</failOnMultipleScalaVersions>
+                    <scalaCompatVersion>${scala.binary.version}</scalaCompatVersion>
                     <scalaVersion>${scala.version}</scalaVersion>
                 </configuration>
             </plugin>
@@ -64,15 +66,15 @@
 
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-core_2.11</artifactId>
+            <artifactId>spark-core_${scala.binary.version}</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-sql_2.11</artifactId>
+            <artifactId>spark-sql_${scala.binary.version}</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-hive_2.11</artifactId>
+            <artifactId>spark-hive_${scala.binary.version}</artifactId>
             <scope>test</scope>
             <exclusions>
                 <exclusion>
@@ -125,7 +127,7 @@
         </dependency>
         <dependency>
             <groupId>org.json4s</groupId>
-            <artifactId>json4s-jackson_2.11</artifactId>
+            <artifactId>json4s-jackson_${scala.binary.version}</artifactId>
         </dependency>
 
 
diff --git a/dhp-workflows/dhp-graph-provision/pom.xml b/dhp-workflows/dhp-graph-provision/pom.xml
index 413cc8cdd6..e62fcdf198 100644
--- a/dhp-workflows/dhp-graph-provision/pom.xml
+++ b/dhp-workflows/dhp-graph-provision/pom.xml
@@ -14,7 +14,7 @@
             <plugin>
                 <groupId>net.alchim31.maven</groupId>
                 <artifactId>scala-maven-plugin</artifactId>
-                <version>4.0.1</version>
+                <version>${net.alchim31.maven.version}</version>
                 <executions>
                     <execution>
                         <id>scala-compile-first</id>
@@ -37,6 +37,8 @@
                         <arg>-Xmax-classfile-name</arg>
                         <arg>200</arg>
                     </args>
+                    <failOnMultipleScalaVersions>true</failOnMultipleScalaVersions>
+                    <scalaCompatVersion>${scala.binary.version}</scalaCompatVersion>
                     <scalaVersion>${scala.version}</scalaVersion>
                 </configuration>
             </plugin>
@@ -48,11 +50,11 @@
 
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-core_2.11</artifactId>
+            <artifactId>spark-core_${scala.binary.version}</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-sql_2.11</artifactId>
+            <artifactId>spark-sql_${scala.binary.version}</artifactId>
         </dependency>
         <dependency>
             <groupId>com.jayway.jsonpath</groupId>
diff --git a/dhp-workflows/dhp-stats-promote/pom.xml b/dhp-workflows/dhp-stats-promote/pom.xml
index ce3e739a5c..9e17a78dcb 100644
--- a/dhp-workflows/dhp-stats-promote/pom.xml
+++ b/dhp-workflows/dhp-stats-promote/pom.xml
@@ -10,11 +10,11 @@
     <dependencies>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-core_2.11</artifactId>
+            <artifactId>spark-core_${scala.binary.version}</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-sql_2.11</artifactId>
+            <artifactId>spark-sql_${scala.binary.version}</artifactId>
         </dependency>
     </dependencies>
 	<build>
diff --git a/dhp-workflows/dhp-stats-update/pom.xml b/dhp-workflows/dhp-stats-update/pom.xml
index 2bc610c420..f491b58689 100644
--- a/dhp-workflows/dhp-stats-update/pom.xml
+++ b/dhp-workflows/dhp-stats-update/pom.xml
@@ -10,11 +10,11 @@
     <dependencies>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-core_2.11</artifactId>
+            <artifactId>spark-core_${scala.binary.version}</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-sql_2.11</artifactId>
+            <artifactId>spark-sql_${scala.binary.version}</artifactId>
         </dependency>
     </dependencies>
 	<build>
diff --git a/dhp-workflows/dhp-usage-raw-data-update/pom.xml b/dhp-workflows/dhp-usage-raw-data-update/pom.xml
index 954c8bd39b..a9dbb09ae1 100644
--- a/dhp-workflows/dhp-usage-raw-data-update/pom.xml
+++ b/dhp-workflows/dhp-usage-raw-data-update/pom.xml
@@ -46,13 +46,11 @@
     <dependencies>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-core_2.11</artifactId>
-            <version>2.2.0</version>
+            <artifactId>spark-core_${scala.binary.version}</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-sql_2.11</artifactId>
-            <version>2.4.5</version>
+            <artifactId>spark-sql_${scala.binary.version}</artifactId>
         </dependency>
         <dependency>
             <groupId>com.googlecode.json-simple</groupId>
diff --git a/dhp-workflows/dhp-usage-stats-build/pom.xml b/dhp-workflows/dhp-usage-stats-build/pom.xml
index 54e18580b3..56aec73b78 100644
--- a/dhp-workflows/dhp-usage-stats-build/pom.xml
+++ b/dhp-workflows/dhp-usage-stats-build/pom.xml
@@ -46,13 +46,11 @@
     <dependencies>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-core_2.11</artifactId>
-            <version>2.2.0</version>
+            <artifactId>spark-core_${scala.binary.version}</artifactId>
         </dependency>
         <dependency>
             <groupId>org.apache.spark</groupId>
-            <artifactId>spark-sql_2.11</artifactId>
-            <version>2.4.5</version>
+            <artifactId>spark-sql_${scala.binary.version}</artifactId>
         </dependency>
         <dependency>
             <groupId>com.googlecode.json-simple</groupId>
diff --git a/pom.xml b/pom.xml
index 4707f7d017..9763554531 100644
--- a/pom.xml
+++ b/pom.xml
@@ -142,7 +142,7 @@
 		<dependencies>
 			<dependency>
 				<groupId>eu.dnetlib.dhp</groupId>
-				<artifactId>dhp-schemas</artifactId>
+				<artifactId>dhp-schemas_${scala.binary.version}</artifactId>
 				<version>${dhp-schemas.version}</version>
 			</dependency>
 			<dependency>
@@ -171,25 +171,25 @@
 			</dependency>
 			<dependency>
 				<groupId>org.apache.spark</groupId>
-				<artifactId>spark-core_2.11</artifactId>
+				<artifactId>spark-core_${scala.binary.version}</artifactId>
 				<version>${dhp.spark.version}</version>
 				<scope>provided</scope>
 			</dependency>
 			<dependency>
 				<groupId>org.apache.spark</groupId>
-				<artifactId>spark-sql_2.11</artifactId>
+				<artifactId>spark-sql_${scala.binary.version}</artifactId>
 				<version>${dhp.spark.version}</version>
 				<scope>provided</scope>
 			</dependency>
 			<dependency>
 				<groupId>org.apache.spark</groupId>
-				<artifactId>spark-graphx_2.11</artifactId>
+				<artifactId>spark-graphx_${scala.binary.version}</artifactId>
 				<version>${dhp.spark.version}</version>
 				<scope>provided</scope>
 			</dependency>
 			<dependency>
 				<groupId>org.apache.spark</groupId>
-				<artifactId>spark-hive_2.11</artifactId>
+				<artifactId>spark-hive_${scala.binary.version}</artifactId>
 				<version>${dhp.spark.version}</version>
 				<scope>test</scope>
 			</dependency>
@@ -295,7 +295,7 @@
 			<dependency>
 				<groupId>com.lucidworks.spark</groupId>
 				<artifactId>spark-solr</artifactId>
-				<version>3.6.0</version>
+				<version>4.0.2</version>
 				<exclusions>
 					<exclusion>
 						<artifactId>*</artifactId>
@@ -523,7 +523,7 @@
 
 			<dependency>
 				<groupId>org.json4s</groupId>
-				<artifactId>json4s-jackson_2.11</artifactId>
+				<artifactId>json4s-jackson_${scala.binary.version}</artifactId>
 				<version>${json4s.version}</version>
 			</dependency>
 
@@ -699,7 +699,7 @@
 				</plugin>
 				<plugin>
 					<groupId>org.antipathy</groupId>
-					<artifactId>mvn-scalafmt_2.11</artifactId>
+					<artifactId>mvn-scalafmt_${scala.binary.version}</artifactId>
 					<version>1.0.1640073709.733712b</version>
 					<dependencies>
 						<dependency>
@@ -756,7 +756,7 @@
 			</plugin>
 			<plugin>
 				<groupId>org.antipathy</groupId>
-				<artifactId>mvn-scalafmt_2.11</artifactId>
+				<artifactId>mvn-scalafmt_${scala.binary.version}</artifactId>
 				<configuration>
 					<configLocation>https://code-repo.d4science.org/D-Net/dnet-hadoop/raw/branch/beta/dhp-build/dhp-code-style/src/main/resources/scalafmt/scalafmt.conf</configLocation>
 					<skipTestSources>false</skipTestSources>
@@ -865,17 +865,18 @@
 		<dhp.cdh.version>cdh5.9.2</dhp.cdh.version>
 		<dhp.hadoop.version>2.6.0-${dhp.cdh.version}</dhp.hadoop.version>
 		<dhp.oozie.version>4.1.0-${dhp.cdh.version}</dhp.oozie.version>
-		<dhp.spark.version>2.4.0.cloudera2</dhp.spark.version>
-		<dhp.jackson.version>2.9.6</dhp.jackson.version>
+		<dhp.spark.version>3.4.1</dhp.spark.version>
+		<dhp.jackson.version>2.14.2</dhp.jackson.version>
 		<dhp.commons.lang.version>3.5</dhp.commons.lang.version>
 		<dhp.site.skip>true</dhp.site.skip>
 		<dhp.guava.version>11.0.2</dhp.guava.version>
-		<scala.version>2.11.12</scala.version>
+		<scala.version>2.12.18</scala.version>
+		<scala.binary.version>2.12</scala.binary.version>
 		<junit-jupiter.version>5.6.1</junit-jupiter.version>
 		<mockito-core.version>3.3.3</mockito-core.version>
 		<mongodb.driver.version>3.4.2</mongodb.driver.version>
 		<vtd.version>[2.12,3.0)</vtd.version>
-		<dhp-schemas.version>[3.17.1]</dhp-schemas.version>
+		<dhp-schemas.version>3.17.2-SNAPSHOT</dhp-schemas.version>
 		<dnet-actionmanager-api.version>[4.0.3]</dnet-actionmanager-api.version>
 		<dnet-actionmanager-common.version>[6.0.5]</dnet-actionmanager-common.version>
 		<dnet-openaire-broker-common.version>[3.1.6]</dnet-openaire-broker-common.version>
@@ -883,13 +884,13 @@
 		<solr.version>7.5.0</solr.version>
 		<okhttp.version>4.7.2</okhttp.version>
 		<common.compress.version>1.20</common.compress.version>
-		<json4s.version>3.5.3</json4s.version>
+		<json4s.version>3.7.0-M11</json4s.version>
 		<jsonschemagenerator.version>4.13.0</jsonschemagenerator.version>
 		<common.csv.version>1.8</common.csv.version>
 		<apache.poi.version>4.1.2</apache.poi.version>
 		<common.text.version>1.8</common.text.version>
 		<org.apache.httpcomponents.version>4.5.3</org.apache.httpcomponents.version>
-		<net.alchim31.maven.version>4.0.1</net.alchim31.maven.version>
+		<net.alchim31.maven.version>4.8.1</net.alchim31.maven.version>
 		<google.gson.version>2.2.2</google.gson.version>
 		<commons.logging.version>1.1.3</commons.logging.version>
 		<commons.collections.version>3.2.1</commons.collections.version>