diff --git a/dhp-pace-core/src/test/java/eu/dnetlib/pace/util/UtilTest.java b/dhp-pace-core/src/test/java/eu/dnetlib/pace/util/UtilTest.java
index be5c1ebb9..93db552c1 100644
--- a/dhp-pace-core/src/test/java/eu/dnetlib/pace/util/UtilTest.java
+++ b/dhp-pace-core/src/test/java/eu/dnetlib/pace/util/UtilTest.java
@@ -11,7 +11,6 @@ import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
 import eu.dnetlib.pace.model.Person;
-import jdk.nashorn.internal.ir.annotations.Ignore;
 
 public class UtilTest {
 
diff --git a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/personentity/ExtractPerson.java b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/personentity/ExtractPerson.java
index e63a50984..debf7e38e 100644
--- a/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/personentity/ExtractPerson.java
+++ b/dhp-workflows/dhp-aggregation/src/main/java/eu/dnetlib/dhp/actionmanager/personentity/ExtractPerson.java
@@ -11,6 +11,7 @@ import java.util.stream.Collectors;
 
 import org.apache.commons.cli.ParseException;
 import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.io.compress.BZip2Codec;
 import org.apache.hadoop.mapred.SequenceFileOutputFormat;
@@ -20,7 +21,6 @@ import org.apache.spark.sql.*;
 import org.jetbrains.annotations.NotNull;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.spark_project.jetty.util.StringUtil;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 
@@ -317,13 +317,13 @@ public class ExtractPerson implements Serializable {
 						"0.91"),
 				null);
 
-		if (Optional.ofNullable(row.getStartDate()).isPresent() && StringUtil.isNotBlank(row.getStartDate())) {
+		if (Optional.ofNullable(row.getStartDate()).isPresent() && StringUtils.isNotBlank(row.getStartDate())) {
 			KeyValue kv = new KeyValue();
 			kv.setKey("startDate");
 			kv.setValue(row.getStartDate());
 			properties.add(kv);
 		}
-		if (Optional.ofNullable(row.getEndDate()).isPresent() && StringUtil.isNotBlank(row.getEndDate())) {
+		if (Optional.ofNullable(row.getEndDate()).isPresent() && StringUtils.isNotBlank(row.getEndDate())) {
 			KeyValue kv = new KeyValue();
 			kv.setKey("endDate");
 			kv.setValue(row.getEndDate());
diff --git a/dhp-workflows/dhp-aggregation/src/main/scala/eu/dnetlib/dhp/collection/crossref/Crossref2Oaf.scala b/dhp-workflows/dhp-aggregation/src/main/scala/eu/dnetlib/dhp/collection/crossref/Crossref2Oaf.scala
index 7c45234f6..e7d68920b 100644
--- a/dhp-workflows/dhp-aggregation/src/main/scala/eu/dnetlib/dhp/collection/crossref/Crossref2Oaf.scala
+++ b/dhp-workflows/dhp-aggregation/src/main/scala/eu/dnetlib/dhp/collection/crossref/Crossref2Oaf.scala
@@ -14,7 +14,7 @@ import eu.dnetlib.dhp.schema.oaf.utils.{
   PidType
 }
 import eu.dnetlib.dhp.utils.DHPUtils
-import org.apache.commons.lang.StringUtils
+import org.apache.commons.lang3.StringUtils
 import org.apache.spark.sql.Row
 import org.json4s
 import org.json4s.DefaultFormats
diff --git a/dhp-workflows/dhp-doiboost/src/main/scala/eu/dnetlib/doiboost/crossref/Crossref2Oaf.scala b/dhp-workflows/dhp-doiboost/src/main/scala/eu/dnetlib/doiboost/crossref/Crossref2Oaf.scala
index d8292a631..a2c36041d 100644
--- a/dhp-workflows/dhp-doiboost/src/main/scala/eu/dnetlib/doiboost/crossref/Crossref2Oaf.scala
+++ b/dhp-workflows/dhp-doiboost/src/main/scala/eu/dnetlib/doiboost/crossref/Crossref2Oaf.scala
@@ -7,7 +7,7 @@ import eu.dnetlib.dhp.schema.oaf.utils.{GraphCleaningFunctions, IdentifierFactor
 import eu.dnetlib.dhp.utils.DHPUtils
 import eu.dnetlib.doiboost.DoiBoostMappingUtil
 import eu.dnetlib.doiboost.DoiBoostMappingUtil._
-import org.apache.commons.lang.StringUtils
+import org.apache.commons.lang3.StringUtils
 import org.json4s
 import org.json4s.DefaultFormats
 import org.json4s.JsonAST._
diff --git a/dhp-workflows/dhp-doiboost/src/main/scala/eu/dnetlib/doiboost/orcid/ORCIDToOAF.scala b/dhp-workflows/dhp-doiboost/src/main/scala/eu/dnetlib/doiboost/orcid/ORCIDToOAF.scala
index 7c58afc09..6ec75f5c3 100644
--- a/dhp-workflows/dhp-doiboost/src/main/scala/eu/dnetlib/doiboost/orcid/ORCIDToOAF.scala
+++ b/dhp-workflows/dhp-doiboost/src/main/scala/eu/dnetlib/doiboost/orcid/ORCIDToOAF.scala
@@ -6,7 +6,7 @@ import eu.dnetlib.dhp.schema.oaf.utils.IdentifierFactory
 import eu.dnetlib.dhp.schema.oaf.{Author, DataInfo, Publication}
 import eu.dnetlib.doiboost.DoiBoostMappingUtil
 import eu.dnetlib.doiboost.DoiBoostMappingUtil.{createSP, generateDataInfo}
-import org.apache.commons.lang.StringUtils
+import org.apache.commons.lang3.StringUtils
 import org.json4s
 import org.json4s.DefaultFormats
 import org.json4s.JsonAST._
diff --git a/dhp-workflows/dhp-enrichment/src/main/java/eu/dnetlib/dhp/api/Utils.java b/dhp-workflows/dhp-enrichment/src/main/java/eu/dnetlib/dhp/api/Utils.java
index 27fb37e5b..6079da365 100644
--- a/dhp-workflows/dhp-enrichment/src/main/java/eu/dnetlib/dhp/api/Utils.java
+++ b/dhp-workflows/dhp-enrichment/src/main/java/eu/dnetlib/dhp/api/Utils.java
@@ -6,11 +6,11 @@ import java.io.Serializable;
 import java.util.*;
 import java.util.stream.Collectors;
 
+import org.apache.commons.lang3.StringUtils;
 import org.jetbrains.annotations.NotNull;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import com.amazonaws.util.StringUtils;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.common.collect.Maps;
 
@@ -81,7 +81,7 @@ public class Utils implements Serializable {
 		Community c = new Community();
 		c.setId(cm.getId());
 		c.setZenodoCommunities(cm.getOtherZenodoCommunities());
-		if (!StringUtils.isNullOrEmpty(cm.getZenodoCommunity()))
+		if (StringUtils.isNotBlank(cm.getZenodoCommunity()))
 			c.getZenodoCommunities().add(cm.getZenodoCommunity());
 		c.setSubjects(cm.getSubjects());
 		c.getSubjects().addAll(cm.getFos());
diff --git a/dhp-workflows/dhp-enrichment/src/main/java/eu/dnetlib/dhp/bulktag/community/Constraint.java b/dhp-workflows/dhp-enrichment/src/main/java/eu/dnetlib/dhp/bulktag/community/Constraint.java
index 82a6a3b85..51525e4d3 100644
--- a/dhp-workflows/dhp-enrichment/src/main/java/eu/dnetlib/dhp/bulktag/community/Constraint.java
+++ b/dhp-workflows/dhp-enrichment/src/main/java/eu/dnetlib/dhp/bulktag/community/Constraint.java
@@ -4,7 +4,7 @@ package eu.dnetlib.dhp.bulktag.community;
 import java.io.Serializable;
 import java.lang.reflect.InvocationTargetException;
 
-import org.apache.htrace.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonIgnore;
 
 import eu.dnetlib.dhp.bulktag.criteria.Selection;
 import eu.dnetlib.dhp.bulktag.criteria.VerbResolver;
diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/hive/GraphHiveTableImporterJob.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/hive/GraphHiveTableImporterJob.java
index 73243dbc5..d4fec3f52 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/hive/GraphHiveTableImporterJob.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/hive/GraphHiveTableImporterJob.java
@@ -72,9 +72,9 @@ public class GraphHiveTableImporterJob {
 		final Encoder<T> clazzEncoder = Encoders.bean(clazz);
 
 		Dataset<Row> dataset = spark
-				.read()
-				.schema(clazzEncoder.schema())
-				.json(inputPath);
+			.read()
+			.schema(clazzEncoder.schema())
+			.json(inputPath);
 
 		if (numPartitions > 0) {
 			log.info("repartitioning {} to {} partitions", clazz.getSimpleName(), numPartitions);
diff --git a/dhp-workflows/dhp-swh/src/main/java/eu/dnetlib/dhp/swh/models/LastVisitData.java b/dhp-workflows/dhp-swh/src/main/java/eu/dnetlib/dhp/swh/models/LastVisitData.java
index 5e705716c..0461e2f94 100644
--- a/dhp-workflows/dhp-swh/src/main/java/eu/dnetlib/dhp/swh/models/LastVisitData.java
+++ b/dhp-workflows/dhp-swh/src/main/java/eu/dnetlib/dhp/swh/models/LastVisitData.java
@@ -3,8 +3,8 @@ package eu.dnetlib.dhp.swh.models;
 
 import java.io.Serializable;
 
-import com.cloudera.com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
 
 @JsonIgnoreProperties(ignoreUnknown = true)
 public class LastVisitData implements Serializable {