Replace new uses of Log4J v1 with v2. Ban v1 artifacts. #3190.

2025-10-14 13:33:08 +00:00 · 2021-03-17 06:04:49 -04:00
parent 2b4f22be65
commit dc487fd29d
43 changed files with 213 additions and 146 deletions
--- a/dspace-api/pom.xml
+++ b/dspace-api/pom.xml
@@ -413,6 +413,12 @@
            <groupId>org.apache.jena</groupId>
            <artifactId>apache-jena-libs</artifactId>
            <type>pom</type>
+            <exclusions>
+                <exclusion>
+                    <groupId>log4j</groupId>
+                    <artifactId>log4j</artifactId>
+                </exclusion>
+            </exclusions>
        </dependency>
        <dependency>
            <groupId>commons-cli</groupId>
@@ -546,6 +552,10 @@
                    <groupId>net.bytebuddy</groupId>
                    <artifactId>byte-buddy</artifactId>
                </exclusion>
+                <exclusion>
+                    <groupId>log4j</groupId>
+                    <artifactId>log4j</artifactId>
+                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
--- a/dspace-api/src/main/java/org/dspace/app/launcher/ScriptLauncher.java
+++ b/dspace-api/src/main/java/org/dspace/app/launcher/ScriptLauncher.java
@@ -14,7 +14,8 @@ import java.util.List;
 import java.util.TreeMap;

 import org.apache.commons.cli.ParseException;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.scripts.DSpaceRunnable;
 import org.dspace.scripts.configuration.ScriptConfiguration;
 import org.dspace.scripts.factory.ScriptServiceFactory;
@@ -36,7 +37,7 @@ import org.jdom.input.SAXBuilder;
 */
 public class ScriptLauncher {

-    private static final Logger log = Logger.getLogger(ScriptLauncher.class);
+    private static final Logger log = LogManager.getLogger();

    /**
     * The service manager kernel
--- a/dspace-api/src/main/java/org/dspace/app/sherpa/v2/SHERPAPublisherResponse.java
+++ b/dspace-api/src/main/java/org/dspace/app/sherpa/v2/SHERPAPublisherResponse.java
@@ -13,7 +13,8 @@ import java.io.InputStreamReader;
 import java.util.LinkedList;
 import java.util.List;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
@@ -26,7 +27,7 @@ import org.json.JSONTokener;
 * @see SHERPAPublisher
 *
 * @author Kim Shepherd
- * 
+ *
 */
 public class SHERPAPublisherResponse {
    // Is this response to be treated as an error?
@@ -52,7 +53,7 @@ public class SHERPAPublisherResponse {
        JSON, XML
    };

-    private static Logger log = Logger.getLogger(SHERPAPublisherResponse.class);
+    private static Logger log = LogManager.getLogger();

    /**
     * Parse SHERPA v2 API for a given format
--- a/dspace-api/src/main/java/org/dspace/app/sherpa/v2/SHERPAResponse.java
+++ b/dspace-api/src/main/java/org/dspace/app/sherpa/v2/SHERPAResponse.java
@@ -16,7 +16,8 @@ import java.util.List;
 import java.util.Map;
 import java.util.TreeMap;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.core.I18nUtil;
 import org.json.JSONArray;
 import org.json.JSONException;
@@ -29,9 +30,9 @@ import org.json.JSONTokener;
 * The structure is based on journal data, which in turn contains data about publishers and policies
 *
 * @see SHERPAJournal
- * 
+ *
 * @author Kim Shepherd
- * 
+ *
 */
 public class SHERPAResponse {
    // Is this response to be treated as an error?
@@ -57,7 +58,7 @@ public class SHERPAResponse {
        JSON, XML
    };

-    private static Logger log = Logger.getLogger(SHERPAResponse.class);
+    private static Logger log = LogManager.getLogger();

    /**
     * Parse SHERPA v2 API for a given format
--- a/dspace-api/src/main/java/org/dspace/content/Bitstream.java
+++ b/dspace-api/src/main/java/org/dspace/content/Bitstream.java
@@ -21,7 +21,8 @@ import javax.persistence.OneToOne;
 import javax.persistence.Table;
 import javax.persistence.Transient;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.content.factory.ContentServiceFactory;
 import org.dspace.content.service.BitstreamService;
 import org.dspace.core.Constants;
@@ -45,7 +46,7 @@ public class Bitstream extends DSpaceObject implements DSpaceObjectLegacySupport
    /**
     * log4j logger
     */
-    private static Logger log = Logger.getLogger(Bitstream.class);
+    private static final Logger log = LogManager.getLogger();

    @Column(name = "bitstream_id", insertable = false, updatable = false)
    private Integer legacyId;
--- a/dspace-api/src/main/java/org/dspace/content/Item.java
+++ b/dspace-api/src/main/java/org/dspace/content/Item.java
@@ -27,7 +27,8 @@ import javax.persistence.Temporal;
 import javax.persistence.TemporalType;
 import javax.persistence.Transient;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.content.comparator.NameAscendingComparator;
 import org.dspace.content.factory.ContentServiceFactory;
 import org.dspace.content.service.ItemService;
@@ -57,7 +58,7 @@ public class Item extends DSpaceObject implements DSpaceObjectLegacySupport {
    /**
     * log4j logger
     */
-    private static Logger log = Logger.getLogger(Item.class);
+    private static final Logger log = LogManager.getLogger();

    /**
     * Wild card for Dublin Core metadata qualifiers/languages
--- a/dspace-api/src/main/java/org/dspace/discovery/SolrSearchCore.java
+++ b/dspace-api/src/main/java/org/dspace/discovery/SolrSearchCore.java
@@ -10,7 +10,8 @@ package org.dspace.discovery;
 import java.io.IOException;

 import org.apache.commons.validator.routines.UrlValidator;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.apache.solr.client.solrj.SolrClient;
 import org.apache.solr.client.solrj.SolrQuery;
 import org.apache.solr.client.solrj.SolrRequest;
@@ -28,7 +29,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 */
 public class SolrSearchCore {

-    private final Logger log = Logger.getLogger(SolrSearchCore.class);
+    private final Logger log = LogManager.getLogger();
    @Autowired
    protected IndexingService indexingService;
    @Autowired
--- a/dspace-api/src/main/java/org/dspace/external/service/impl/ExternalDataServiceImpl.java
+++ b/dspace-api/src/main/java/org/dspace/external/service/impl/ExternalDataServiceImpl.java
@@ -11,7 +11,7 @@ import java.sql.SQLException;
 import java.util.List;
 import java.util.Optional;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.Logger;
 import org.dspace.authorize.AuthorizeException;
 import org.dspace.authorize.service.AuthorizeService;
 import org.dspace.content.Collection;
@@ -32,7 +32,8 @@ import org.springframework.beans.factory.annotation.Autowired;
 */
 public class ExternalDataServiceImpl implements ExternalDataService {

-    private static final Logger log = Logger.getLogger(ExternalDataServiceImpl.class);
+    private static final Logger log
+            = org.apache.logging.log4j.LogManager.getLogger();

    @Autowired
    private List<ExternalDataProvider> externalDataProviders;
--- a/dspace-api/src/main/java/org/dspace/statistics/AnonymizeStatistics.java
+++ b/dspace-api/src/main/java/org/dspace/statistics/AnonymizeStatistics.java
@@ -15,7 +15,7 @@ import static java.util.Calendar.DAY_OF_YEAR;
 import static java.util.Collections.singletonList;
 import static org.apache.commons.cli.Option.builder;
 import static org.apache.commons.lang.time.DateFormatUtils.format;
-import static org.apache.log4j.Logger.getLogger;
+import static org.apache.logging.log4j.LogManager.getLogger;
 import static org.dspace.core.LogManager.getHeader;
 import static org.dspace.statistics.SolrLoggerServiceImpl.DATE_FORMAT_8601;

@@ -33,7 +33,7 @@ import org.apache.commons.cli.DefaultParser;
 import org.apache.commons.cli.HelpFormatter;
 import org.apache.commons.cli.Options;
 import org.apache.commons.cli.ParseException;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.Logger;
 import org.apache.solr.client.solrj.SolrServerException;
 import org.apache.solr.client.solrj.response.QueryResponse;
 import org.apache.solr.common.SolrDocument;
@@ -55,9 +55,9 @@ import org.dspace.statistics.service.SolrLoggerService;
 */
 public class AnonymizeStatistics {

-    private static Logger log = getLogger(AnonymizeStatistics.class);
-    private static Context context = new Context();
-    private static String action = "anonymize_statistics";
+    private static final Logger log = getLogger();
+    private static final Context context = new Context();
+    private static final String action = "anonymize_statistics";

    private static final String HELP_OPTION = "h";
    private static final String SLEEP_OPTION = "s";
@@ -66,9 +66,9 @@ public class AnonymizeStatistics {

    private static int sleep;

-    private static SolrLoggerService solrLoggerService =
+    private static final SolrLoggerService solrLoggerService =
            StatisticsServiceFactory.getInstance().getSolrLoggerService();
-    private static ConfigurationService configurationService =
+    private static final ConfigurationService configurationService =
            DSpaceServicesFactory.getInstance().getConfigurationService();

    private static int batchSize = 100;
--- a/dspace-api/src/main/java/org/dspace/statistics/export/IrusExportUsageEventListener.java
+++ b/dspace-api/src/main/java/org/dspace/statistics/export/IrusExportUsageEventListener.java
@@ -9,7 +9,7 @@ package org.dspace.statistics.export;

 import java.util.UUID;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.Logger;
 import org.dspace.content.Bitstream;
 import org.dspace.content.Item;
 import org.dspace.core.Context;
@@ -27,7 +27,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 */
 public class IrusExportUsageEventListener extends AbstractUsageEventListener {
    /*  Log4j logger*/
-    private static Logger log = Logger.getLogger(IrusExportUsageEventListener.class);
+    private static final Logger log = org.apache.logging.log4j.LogManager.getLogger();

    @Autowired
    ConfigurationService configurationService;
@@ -37,6 +37,7 @@ public class IrusExportUsageEventListener extends AbstractUsageEventListener {
     *
     * @param event includes all the information related to the event that occurred
     */
+    @Override
    public void receiveEvent(Event event) {
        if (configurationService.getBooleanProperty("irus.statistics.tracker.enabled", false)) {
            if (event instanceof UsageEvent) {
--- a/dspace-api/src/main/java/org/dspace/statistics/export/processor/ExportEventProcessor.java
+++ b/dspace-api/src/main/java/org/dspace/statistics/export/processor/ExportEventProcessor.java
@@ -19,7 +19,8 @@ import javax.servlet.http.HttpServletRequest;

 import org.apache.commons.codec.CharEncoding;
 import org.apache.commons.lang3.StringUtils;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.content.DCDate;
 import org.dspace.content.Entity;
 import org.dspace.content.EntityType;
@@ -41,7 +42,7 @@ import org.dspace.statistics.export.service.OpenUrlService;
 */
 public abstract class ExportEventProcessor {

-    private static Logger log = Logger.getLogger(ExportEventProcessor.class);
+    private static final Logger log = LogManager.getLogger();

    protected static final String ENTITY_TYPE_DEFAULT = "Publication";

@@ -50,14 +51,17 @@ public abstract class ExportEventProcessor {

    protected final static String UTF_8 = CharEncoding.UTF_8;

-    private ConfigurationService configurationService = DSpaceServicesFactory.getInstance().getConfigurationService();
-    private EntityService entityService = ContentServiceFactory.getInstance().getEntityService();
-    private ItemService itemService = ContentServiceFactory.getInstance().getItemService();
-    private OpenUrlService openUrlService = OpenURLTrackerLoggerServiceFactory.getInstance().getOpenUrlService();
+    private final ConfigurationService configurationService
+            = DSpaceServicesFactory.getInstance().getConfigurationService();
+    private final EntityService entityService
+            = ContentServiceFactory.getInstance().getEntityService();
+    private final ItemService itemService
+            = ContentServiceFactory.getInstance().getItemService();
+    private final OpenUrlService openUrlService
+            = OpenURLTrackerLoggerServiceFactory.getInstance().getOpenUrlService();

-
-    private Context context;
-    private HttpServletRequest request;
+    private final Context context;
+    private final HttpServletRequest request;

    /**
     * Creates a new ExportEventProcessor based on the params and initializes the services
--- a/dspace-api/src/main/java/org/dspace/statistics/export/service/OpenUrlServiceImpl.java
+++ b/dspace-api/src/main/java/org/dspace/statistics/export/service/OpenUrlServiceImpl.java
@@ -16,7 +16,8 @@ import java.util.Date;
 import java.util.List;

 import org.apache.commons.lang.StringUtils;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.core.Context;
 import org.dspace.statistics.export.OpenURLTracker;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -26,7 +27,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 */
 public class OpenUrlServiceImpl implements OpenUrlService {

-    private Logger log = Logger.getLogger(OpenUrlService.class);
+    private final Logger log = LogManager.getLogger();

    @Autowired
    protected FailedOpenURLTrackerService failedOpenUrlTrackerService;
@@ -38,6 +39,7 @@ public class OpenUrlServiceImpl implements OpenUrlService {
     * @param urlStr - the url to be processed
     * @throws SQLException
     */
+    @Override
    public void processUrl(Context c, String urlStr) throws SQLException {
        log.debug("Prepared to send url to tracker URL: " + urlStr);

@@ -107,6 +109,7 @@ public class OpenUrlServiceImpl implements OpenUrlService {
     * @param context
     * @throws SQLException
     */
+    @Override
    public void reprocessFailedQueue(Context context) throws SQLException {
        if (failedOpenUrlTrackerService == null) {
            log.error("Error retrieving the \"failedOpenUrlTrackerService\" instance, aborting the processing");
@@ -124,6 +127,7 @@ public class OpenUrlServiceImpl implements OpenUrlService {
     * @param url
     * @throws SQLException
     */
+    @Override
    public void logfailed(Context context, String url) throws SQLException {
        Date now = new Date();
        if (StringUtils.isBlank(url)) {
--- a/dspace-api/src/main/java/org/dspace/submit/step/ExtractionStep.java
+++ b/dspace-api/src/main/java/org/dspace/submit/step/ExtractionStep.java
@@ -7,7 +7,8 @@
 */
 package org.dspace.submit.step;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;

 /**
 * @author Luigi Andrea Pascarelli (luigiandrea.pascarelli at 4science.it)
@@ -16,7 +17,6 @@ public class ExtractionStep extends MetadataStep {
    /**
     * log4j logger
     */
-    private static Logger log = Logger
-        .getLogger(ExtractionStep.class);
+    private static final Logger log = LogManager.getLogger();

 }
--- a/dspace-api/src/main/java/org/dspace/submit/step/MetadataStep.java
+++ b/dspace-api/src/main/java/org/dspace/submit/step/MetadataStep.java
@@ -21,7 +21,8 @@ import gr.ekt.bte.core.Record;
 import gr.ekt.bte.core.Value;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.http.HttpException;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.authorize.AuthorizeException;
 import org.dspace.content.InProgressSubmission;
 import org.dspace.content.Item;
@@ -41,14 +42,14 @@ public class MetadataStep extends AbstractProcessingStep {
    /**
     * log4j logger
     */
-    private static Logger log = Logger.getLogger(MetadataStep.class);
+    private static final Logger log = LogManager.getLogger();

    protected List<MetadataListener> listeners = DSpaceServicesFactory.getInstance().getServiceManager()
                                                                      .getServicesByType(MetadataListener.class);

-    protected Map<String, List<MetadataValue>> metadataMap = new HashMap<String, List<MetadataValue>>();
-    private Map<String, Set<String>> results = new HashMap<String, Set<String>>();
-    private Map<String, String> mappingIdentifier = new HashMap<String, String>();
+    protected Map<String, List<MetadataValue>> metadataMap = new HashMap<>();
+    private final Map<String, Set<String>> results = new HashMap<>();
+    private final Map<String, String> mappingIdentifier = new HashMap<>();

    @Override
    public void doPreProcessing(Context context, InProgressSubmission wsi) {
@@ -60,7 +61,7 @@ public class MetadataStep extends AbstractProcessingStep {
                if (mm != null && !mm.isEmpty()) {
                    metadataMap.put(metadata, mm);
                } else {
-                    metadataMap.put(metadata, new ArrayList<MetadataValue>());
+                    metadataMap.put(metadata, new ArrayList<>());
                }
                mappingIdentifier.put(metadata, listener.getMetadata().get(metadata));
            }
@@ -160,7 +161,7 @@ public class MetadataStep extends AbstractProcessingStep {
        String key = mappingIdentifier.get(metadata);
        Set<String> identifiers = null;
        if (!results.containsKey(key)) {
-            identifiers = new HashSet<String>();
+            identifiers = new HashSet<>();
        } else {
            identifiers = results.get(key);
        }
@@ -169,7 +170,7 @@ public class MetadataStep extends AbstractProcessingStep {
    }

    public List<Record> convertFields(List<Record> recordSet, Map<String, String> fieldMap) {
-        List<Record> result = new ArrayList<Record>();
+        List<Record> result = new ArrayList<>();
        for (Record publication : recordSet) {
            for (String fieldName : fieldMap.keySet()) {
                String md = null;
--- a/dspace-api/src/main/java/org/dspace/util/SolrUpgradePre6xStatistics.java
+++ b/dspace-api/src/main/java/org/dspace/util/SolrUpgradePre6xStatistics.java
@@ -21,7 +21,8 @@ import org.apache.commons.cli.DefaultParser;
 import org.apache.commons.cli.HelpFormatter;
 import org.apache.commons.cli.Options;
 import org.apache.commons.cli.ParseException;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.apache.solr.client.solrj.SolrQuery;
 import org.apache.solr.client.solrj.SolrServerException;
 import org.apache.solr.client.solrj.impl.HttpSolrClient;
@@ -51,19 +52,19 @@ import org.dspace.services.factory.DSpaceServicesFactory;

 /**
 * CLI tool to upgrade legacy id references in SOLR statistics to DSpace 6 UUID's.
- * 
+ *
 * This command will need to be run iteratively over each statistics shard until all legacy id values have
 * been replaced.
- * 
+ *
 * If a legacy id cannot be resolved from the database, the id will remain unchanged.
 *   "field:* AND NOT(field:*-*)" can be used to locate legacy ids
- * 
+ *
 * See DS-3602 for the origin of this issue.  This code is targeted for inclusion in the DSpace 6.1 release.
- * 
+ *
 * Recommendation: for a large repository, run this command with -Xmx2000m if possible.
- * 
+ *
 * To process 1,000,000 statistics records, it took 60 min to complete.
- * 
+ *
 * @author Terry Brady, Georgetown University Library
 */

@@ -109,7 +110,7 @@ public class SolrUpgradePre6xStatistics {
    }

    //Logger
-    private static final Logger log = Logger.getLogger(SolrUpgradePre6xStatistics.class);
+    private static final Logger log = LogManager.getLogger();

    //DSpace Servcies
    private ConfigurationService configurationService = DSpaceServicesFactory.getInstance().getConfigurationService();
@@ -202,7 +203,7 @@ public class SolrUpgradePre6xStatistics {

    /**
     * Compute the time since the last batch was processed
-     * 
+     *
     * @param fromStart
     *            if true, report on processing time since the start of the program
     * @return the time in ms since the start time
@@ -223,9 +224,9 @@ public class SolrUpgradePre6xStatistics {

    /*
     * Format ms count as h:mm:ss
-     * 
+     *
     * @param dur Duration in ms
-     * 
+     *
     * @return duration formatted as h:mm:ss
     */
    private String duration(long dur) {
@@ -238,7 +239,7 @@ public class SolrUpgradePre6xStatistics {

    /**
     * Print a status message appended with the processing time for the operation
-     * 
+     *
     * @param header
     *            Message to display
     * @param fromStart
@@ -313,7 +314,7 @@ public class SolrUpgradePre6xStatistics {

    /**
     * Entry point for command-line invocation
-     * 
+     *
     * @param args
     *            command-line arguments; see help for description
     * @throws ParseException
@@ -437,7 +438,7 @@ public class SolrUpgradePre6xStatistics {
     * Process records with a legacy id. From the command line, the user may specify
     * records of a specific type to update Otherwise, the following sequence will
     * be applied in order to optimize hibernate caching.
-     * 
+     *
     * Communities and Collections - retain in the cache since each is likely to be
     * re-used Items - retain in the cache until a new item is processed Bitstreams
     * - retain in the cache until a new bitstream is processed
@@ -462,12 +463,12 @@ public class SolrUpgradePre6xStatistics {

    /*
     * Update records associated with a particular object id
-     * 
+     *
     * @param query Query to retrieve all of the statistics records associated with
     * a particular object
-     * 
+     *
     * @param field Field to use for grouping records
-     * 
+     *
     * @return number of items processed. 0 indicates that no more work is available
     * (or the max processed has been reached).
     */
@@ -508,14 +509,14 @@ public class SolrUpgradePre6xStatistics {

    /*
     * Map solr fields from legacy ids to UUIDs.
-     * 
+     *
     * The id field is interpreted by the type field. The scopeId field is
     * interpreted by scopeType field.
-     * 
+     *
     * Legacy ids will be unchanged if they cannot be mapped
-     * 
+     *
     * @param input The SOLR statistics document to be updated
-     * 
+     *
     * @param col The SOLR field to update (if present)
     */
    private void mapField(SolrInputDocument input, FIELD col) throws SQLException {
@@ -581,7 +582,7 @@ public class SolrUpgradePre6xStatistics {
    /*
     * Determine if the last processed item should be cleared from the hibernate
     * cache
-     * 
+     *
     * @param item Current item being processed
     */
    private void checkLastItem(Item item) throws SQLException {
@@ -599,7 +600,7 @@ public class SolrUpgradePre6xStatistics {
    /*
     * Determine if the last processed bitstream should be cleared from the
     * hibernate cache
-     * 
+     *
     * @param bitstream Current bitstream being processed
     */
    private void checkLastBitstream(Bitstream bitstream) throws SQLException {
@@ -617,9 +618,9 @@ public class SolrUpgradePre6xStatistics {
    /*
     * Retrieve the UUID corresponding to a legacy id found in a SOLR statistics
     * record
-     * 
+     *
     * @param col Solr Statistic Field being processed
-     * 
+     *
     * @param val Value to lookup as a legacy id
     */
    private UUID mapId(FIELD col, int val) throws SQLException {
@@ -647,9 +648,9 @@ public class SolrUpgradePre6xStatistics {
    /*
     * Retrieve the UUID corresponding to a legacy id found in a SOLR statistics
     * record
-     * 
+     *
     * @param type Identifying type field for id OR scopeType field for scopeId
-     * 
+     *
     * @param val Value to lookup as a legacy id
     */
    private UUID mapType(int type, int val) throws SQLException {
@@ -679,9 +680,9 @@ public class SolrUpgradePre6xStatistics {
    /*
     * Retrieve the UUID corresponding to a legacy owner found in a SOLR statistics
     * record Legacy owner fields are prefixed in solr with "e" or "g"
-     * 
+     *
     * @param owntype Identifying type field (e - eperson, g - group)
-     * 
+     *
     * @param val Value to lookup as a legacy id
     */
    private UUID mapOwner(String owntype, int val) throws SQLException {
--- a/dspace-api/src/test/java/org/dspace/builder/EntityTypeBuilder.java
+++ b/dspace-api/src/test/java/org/dspace/builder/EntityTypeBuilder.java
@@ -9,7 +9,8 @@ package org.dspace.builder;

 import java.sql.SQLException;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.authorize.AuthorizeException;
 import org.dspace.content.EntityType;
 import org.dspace.content.service.EntityTypeService;
@@ -19,7 +20,7 @@ import org.dspace.discovery.SearchServiceException;
 public class EntityTypeBuilder extends AbstractBuilder<EntityType, EntityTypeService> {

    /* Log4j logger*/
-    private static final Logger log = Logger.getLogger(EntityTypeBuilder.class);
+    private static final Logger log = LogManager.getLogger();

    private EntityType entityType;

--- a/dspace-api/src/test/java/org/dspace/builder/RelationshipBuilder.java
+++ b/dspace-api/src/test/java/org/dspace/builder/RelationshipBuilder.java
@@ -10,7 +10,8 @@ package org.dspace.builder;
 import java.io.IOException;
 import java.sql.SQLException;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.authorize.AuthorizeException;
 import org.dspace.content.Item;
 import org.dspace.content.Relationship;
@@ -22,7 +23,7 @@ import org.dspace.discovery.SearchServiceException;
 public class RelationshipBuilder extends AbstractBuilder<Relationship, RelationshipService> {

    /* Log4j logger*/
-    private static final Logger log = Logger.getLogger(RelationshipBuilder.class);
+    private static final Logger log = LogManager.getLogger();

    private Relationship relationship;

--- a/dspace-api/src/test/java/org/dspace/builder/RelationshipTypeBuilder.java
+++ b/dspace-api/src/test/java/org/dspace/builder/RelationshipTypeBuilder.java
@@ -10,7 +10,8 @@ package org.dspace.builder;
 import java.sql.SQLException;
 import java.util.List;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.authorize.AuthorizeException;
 import org.dspace.content.EntityType;
 import org.dspace.content.Relationship;
@@ -22,7 +23,7 @@ import org.dspace.discovery.SearchServiceException;
 public class RelationshipTypeBuilder extends AbstractBuilder<RelationshipType, RelationshipTypeService> {

    /* Log4j logger*/
-    private static final Logger log = Logger.getLogger(RelationshipTypeBuilder.class);
+    private static final Logger log = LogManager.getLogger();

    private RelationshipType relationshipType;

--- a/dspace-api/src/test/java/org/dspace/builder/ResourcePolicyBuilder.java
+++ b/dspace-api/src/test/java/org/dspace/builder/ResourcePolicyBuilder.java
@@ -11,7 +11,8 @@ import java.io.IOException;
 import java.sql.SQLException;
 import java.util.Date;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.authorize.AuthorizeException;
 import org.dspace.authorize.ResourcePolicy;
 import org.dspace.authorize.service.ResourcePolicyService;
@@ -24,7 +25,7 @@ import org.dspace.eperson.Group;
 public class ResourcePolicyBuilder extends AbstractBuilder<ResourcePolicy, ResourcePolicyService> {

    /* Log4j logger*/
-    private static final Logger log = Logger.getLogger(ResourcePolicyBuilder.class);
+    private static final Logger log = LogManager.getLogger();

    private ResourcePolicy resourcePolicy;

--- a/dspace-api/src/test/java/org/dspace/statistics/export/ITIrusExportUsageEventListener.java
+++ b/dspace-api/src/test/java/org/dspace/statistics/export/ITIrusExportUsageEventListener.java
@@ -24,7 +24,8 @@ import java.util.regex.Pattern;
 import javax.servlet.http.HttpServletRequest;

 import org.apache.commons.codec.CharEncoding;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.AbstractIntegrationTestWithDatabase;
 import org.dspace.authorize.AuthorizeException;
 import org.dspace.builder.BitstreamBuilder;
@@ -65,7 +66,7 @@ import org.junit.Test;
 //@RunWith(MockitoJUnitRunner.class)
 public class ITIrusExportUsageEventListener extends AbstractIntegrationTestWithDatabase {

-    private static Logger log = Logger.getLogger(ITIrusExportUsageEventListener.class);
+    private static final Logger log = LogManager.getLogger();


    protected CommunityService communityService = ContentServiceFactory.getInstance().getCommunityService();
--- a/dspace-api/src/test/java/org/dspace/statistics/export/ITRetryFailedOpenUrlTracker.java
+++ b/dspace-api/src/test/java/org/dspace/statistics/export/ITRetryFailedOpenUrlTracker.java
@@ -13,7 +13,8 @@ import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.List;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.AbstractIntegrationTest;
 import org.dspace.app.scripts.handler.impl.TestDSpaceRunnableHandler;
 import org.dspace.scripts.DSpaceRunnable;
@@ -31,7 +32,7 @@ import org.junit.Test;
 */
 public class ITRetryFailedOpenUrlTracker extends AbstractIntegrationTest {

-    private static Logger log = Logger.getLogger(ITRetryFailedOpenUrlTracker.class);
+    private static final Logger log = LogManager.getLogger();


    protected FailedOpenURLTrackerService failedOpenURLTrackerService =
@@ -41,8 +42,8 @@ public class ITRetryFailedOpenUrlTracker extends AbstractIntegrationTest {
                                                                 .getServiceByName("testProcessedUrls",
                                                                                   ArrayList.class);

-    private ScriptService scriptService = ScriptServiceFactory.getInstance().getScriptService();
-
+    private final ScriptService scriptService
+            = ScriptServiceFactory.getInstance().getScriptService();

    /**
     * Clean up the logged entries from the db after each test
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/IdentifierRestController.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/IdentifierRestController.java
@@ -16,7 +16,8 @@ import java.util.Arrays;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.atteo.evo.inflector.English;
 import org.dspace.app.rest.converter.ConverterService;
 import org.dspace.app.rest.model.DSpaceObjectRest;
@@ -49,8 +50,7 @@ public class IdentifierRestController implements InitializingBean {

    public static final String PARAM = "id";

-    private static final Logger log =
-            Logger.getLogger(IdentifierRestController.class);
+    private static final Logger log = LogManager.getLogger();

    @Autowired
    private ConverterService converter;
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/MappedCollectionRestController.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/MappedCollectionRestController.java
@@ -17,7 +17,8 @@ import java.util.UUID;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.exception.MethodNotAllowedException;
 import org.dspace.app.rest.exception.UnprocessableEntityException;
 import org.dspace.app.rest.utils.ContextUtil;
@@ -45,7 +46,7 @@ import org.springframework.web.bind.annotation.RestController;
@RequestMapping("/api/core/items" + REGEX_REQUESTMAPPING_IDENTIFIER_AS_UUID + "/mappedCollections")
 public class MappedCollectionRestController {

-    private static final Logger log = Logger.getLogger(MappedCollectionRestController.class);
+    private static final Logger log = LogManager.getLogger();

    @Autowired
    private ItemService itemService;
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/OpenSearchController.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/OpenSearchController.java
@@ -21,9 +21,8 @@ import javax.xml.transform.TransformerFactory;
 import javax.xml.transform.dom.DOMSource;
 import javax.xml.transform.stream.StreamResult;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.utils.ContextUtil;
-import org.dspace.app.rest.utils.ScopeResolver;
 import org.dspace.app.util.SyndicationFeed;
 import org.dspace.app.util.factory.UtilServiceFactory;
 import org.dspace.app.util.service.OpenSearchService;
@@ -59,7 +58,7 @@ import org.w3c.dom.Document;
@RequestMapping("/opensearch")
 public class OpenSearchController {

-    private static final Logger log = Logger.getLogger(ScopeResolver.class);
+    private static final Logger log = org.apache.logging.log4j.LogManager.getLogger();
    private static final String errorpath = "/error";
    private List<String> searchIndices = null;

--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/UUIDLookupRestController.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/UUIDLookupRestController.java
@@ -17,7 +17,8 @@ import java.util.UUID;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.converter.ConverterService;
 import org.dspace.app.rest.model.DSpaceObjectRest;
 import org.dspace.app.rest.utils.ContextUtil;
@@ -59,8 +60,7 @@ public class UUIDLookupRestController implements InitializingBean {
    @Autowired
    private Utils utils;

-    private static final Logger log =
-            Logger.getLogger(UUIDLookupRestController.class);
+    private static final Logger log = LogManager.getLogger();

    @Autowired
    private DiscoverableEndpointsService discoverableEndpointsService;
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/authorization/impl/CreateBitstreamFeature.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/authorization/impl/CreateBitstreamFeature.java
@@ -9,7 +9,8 @@ package org.dspace.app.rest.authorization.impl;

 import java.sql.SQLException;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.authorization.AuthorizationFeature;
 import org.dspace.app.rest.authorization.AuthorizationFeatureDocumentation;
 import org.dspace.app.rest.authorization.AuthorizeServiceRestUtil;
@@ -37,7 +38,7 @@ import org.springframework.stereotype.Component;
    description = "It can be used to verify if bitstreams can be created in a specific bundle")
 public class CreateBitstreamFeature implements AuthorizationFeature {

-    Logger log = Logger.getLogger(CreateBitstreamFeature.class);
+    Logger log = LogManager.getLogger();

    public final static String NAME = "canCreateBitstream";

--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/authorization/impl/MoveFeature.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/authorization/impl/MoveFeature.java
@@ -9,7 +9,8 @@ package org.dspace.app.rest.authorization.impl;

 import java.sql.SQLException;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.authorization.AuthorizationFeature;
 import org.dspace.app.rest.authorization.AuthorizationFeatureDocumentation;
 import org.dspace.app.rest.authorization.AuthorizeServiceRestUtil;
@@ -38,7 +39,7 @@ import org.springframework.stereotype.Component;
    description = "It can be used to verify if an item can be moved to a different collection")
 public class MoveFeature implements AuthorizationFeature {

-    Logger log = Logger.getLogger(MoveFeature.class);
+    Logger log = LogManager.getLogger();

    public final static String NAME = "canMove";

--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/authorization/impl/RequestCopyFeature.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/authorization/impl/RequestCopyFeature.java
@@ -12,7 +12,8 @@ import java.util.List;
 import java.util.UUID;

 import org.apache.commons.lang3.StringUtils;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.authorization.AuthorizationFeature;
 import org.dspace.app.rest.authorization.AuthorizationFeatureDocumentation;
 import org.dspace.app.rest.model.BaseObjectRest;
@@ -37,7 +38,7 @@ import org.springframework.stereotype.Component;
 * in an item.
 *
 * Authorization is granted for a bitstream if the user has no access to the bitstream
- * and the bistream is part of an archived item.
+ * and the bitstream is part of an archived item.
 * Authorization is granted for an item if the user has no access to a bitstream in the item, and the item is archived.
 */
@Component
@@ -45,7 +46,7 @@ import org.springframework.stereotype.Component;
        description = "It can be used to verify if the user can request a copy of a bitstream")
 public class RequestCopyFeature implements AuthorizationFeature {

-    Logger log = Logger.getLogger(RequestCopyFeature.class);
+    Logger log = LogManager.getLogger();

    public final static String NAME = "canRequestACopy";

--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/converter/ConverterService.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/converter/ConverterService.java
@@ -20,7 +20,8 @@ import javax.annotation.Nullable;
 import javax.annotation.PostConstruct;

 import org.apache.commons.lang3.StringUtils;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.link.HalLinkFactory;
 import org.dspace.app.rest.link.HalLinkService;
 import org.dspace.app.rest.model.BaseObjectRest;
@@ -52,13 +53,13 @@ import org.springframework.stereotype.Service;
 /**
 * Converts domain objects from the DSpace service layer to rest objects, and from rest objects to resource
 * objects, applying {@link Projection}s where applicable.
- * 
+ *
 * @author Luca Giamminonni (luca.giamminonni at 4science dot it)
 */
@Service
 public class ConverterService {

-    private static final Logger log = Logger.getLogger(ConverterService.class);
+    private static final Logger log = LogManager.getLogger();

    private final Map<String, Projection> projectionMap = new HashMap<>();

--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/converter/DiscoverFacetsConverter.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/converter/DiscoverFacetsConverter.java
@@ -11,7 +11,8 @@ import java.util.List;

 import org.apache.commons.collections4.CollectionUtils;
 import org.apache.commons.lang3.StringUtils;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.model.SearchFacetEntryRest;
 import org.dspace.app.rest.model.SearchFacetValueRest;
 import org.dspace.app.rest.model.SearchResultsRest;
@@ -31,9 +32,9 @@ import org.springframework.stereotype.Component;
@Component
 public class DiscoverFacetsConverter {

-    private static final Logger log = Logger.getLogger(DiscoverFacetsConverter.class);
+    private static final Logger log = LogManager.getLogger(DiscoverFacetsConverter.class);

-    private DiscoverFacetValueConverter facetValueConverter = new DiscoverFacetValueConverter();
+    private final DiscoverFacetValueConverter facetValueConverter = new DiscoverFacetValueConverter();

    @Autowired
    private SearchService searchService;
@@ -56,7 +57,7 @@ public class DiscoverFacetsConverter {
    /**
     * Fill the facet values information in the SearchResultsRest using the information in the api DiscoverResult object
     * according to the configuration applied to the discovery query
-     * 
+     *
     * @param context
     *            The relevant DSpace context
     * @param searchResult
@@ -104,7 +105,7 @@ public class DiscoverFacetsConverter {

    /**
     * This method will fill the facetEntry with the appropriate min and max values if they're not empty
-     * 
+     *
     * @param context
     *            The relevant DSpace context
     * @param field
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/converter/DiscoverResultConverter.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/converter/DiscoverResultConverter.java
@@ -12,7 +12,8 @@ import java.util.Map;

 import org.apache.commons.collections4.CollectionUtils;
 import org.apache.commons.collections4.MapUtils;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.converter.query.SearchQueryConverter;
 import org.dspace.app.rest.model.RestAddressableModel;
 import org.dspace.app.rest.model.SearchResultEntryRest;
@@ -34,7 +35,7 @@ import org.springframework.stereotype.Component;
@Component
 public class DiscoverResultConverter {

-    private static final Logger log = Logger.getLogger(DiscoverResultConverter.class);
+    private static final Logger log = LogManager.getLogger();

    @Autowired
    private List<IndexableObjectConverter> converters;
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/converter/VersionConverter.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/converter/VersionConverter.java
@@ -9,7 +9,8 @@ package org.dspace.app.rest.converter;

 import java.sql.SQLException;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.model.VersionRest;
 import org.dspace.app.rest.projection.Projection;
 import org.dspace.app.rest.utils.ContextUtil;
@@ -29,7 +30,7 @@ import org.springframework.stereotype.Component;
@Component
 public class VersionConverter implements DSpaceConverter<Version, VersionRest> {

-    private static final Logger log = Logger.getLogger(VersionConverter.class);
+    private static final Logger log = LogManager.getLogger();

    @Autowired
    private AuthorizeService authorizeService;
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/ClaimedTaskRestRepository.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/ClaimedTaskRestRepository.java
@@ -16,7 +16,8 @@ import javax.mail.MessagingException;
 import javax.servlet.http.HttpServletRequest;

 import org.apache.commons.lang3.StringUtils;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.DiscoverableEndpointsService;
 import org.dspace.app.rest.Parameter;
 import org.dspace.app.rest.SearchRestMethod;
@@ -67,7 +68,7 @@ import org.springframework.stereotype.Component;
 public class ClaimedTaskRestRepository extends DSpaceRestRepository<ClaimedTaskRest, Integer>
                                       implements InitializingBean {

-    private static final Logger log = Logger.getLogger(ClaimedTaskRestRepository.class);
+    private static final Logger log = LogManager.getLogger();

    @Autowired
    ItemService itemService;
@@ -231,7 +232,7 @@ public class ClaimedTaskRestRepository extends DSpaceRestRepository<ClaimedTaskR
    /**
     * This method delete only the claimed task. The workflow engine will return it to the pool if there are not
     * enough other claimed tasks for the same workflowitem.
-     * 
+     *
     */
    @PreAuthorize("hasPermission(#id, 'CLAIMEDTASK', 'DELETE')")
    protected void delete(Context context, Integer id) {
@@ -251,6 +252,7 @@ public class ClaimedTaskRestRepository extends DSpaceRestRepository<ClaimedTaskR
        }
    }

+    @Override
    public Page<ClaimedTaskRest> findAll(Context context, Pageable pageable) {
        throw new RepositoryMethodNotImplementedException(ClaimedTaskRest.NAME, "findAll");
    }
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/EPersonRestRepository.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/EPersonRestRepository.java
@@ -16,7 +16,8 @@ import javax.servlet.http.HttpServletRequest;

 import com.fasterxml.jackson.databind.ObjectMapper;
 import org.apache.commons.lang3.StringUtils;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.DiscoverableEndpointsService;
 import org.dspace.app.rest.Parameter;
 import org.dspace.app.rest.SearchRestMethod;
@@ -61,7 +62,7 @@ import org.springframework.stereotype.Component;
 public class EPersonRestRepository extends DSpaceObjectRestRepository<EPerson, EPersonRest>
                                   implements InitializingBean {

-    private static final Logger log = Logger.getLogger(EPersonRestRepository.class);
+    private static final Logger log = LogManager.getLogger();

    @Autowired
    AuthorizeService authorizeService;
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/ItemRestRepository.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/ItemRestRepository.java
@@ -20,7 +20,8 @@ import javax.servlet.http.HttpServletRequest;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import org.apache.commons.lang3.StringUtils;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.converter.MetadataConverter;
 import org.dspace.app.rest.exception.DSpaceBadRequestException;
 import org.dspace.app.rest.exception.RepositoryMethodNotImplementedException;
@@ -61,7 +62,7 @@ import org.springframework.stereotype.Component;
@Component(ItemRest.CATEGORY + "." + ItemRest.NAME)
 public class ItemRestRepository extends DSpaceObjectRestRepository<Item, ItemRest> {

-    private static final Logger log = Logger.getLogger(ItemRestRepository.class);
+    private static final Logger log = LogManager.getLogger(ItemRestRepository.class);

    public static final String[] COPYVIRTUAL_ALL = {"all"};
    public static final String[] COPYVIRTUAL_CONFIGURED = {"configured"};
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/PoolTaskRestRepository.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/PoolTaskRestRepository.java
@@ -13,7 +13,8 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.UUID;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.DiscoverableEndpointsService;
 import org.dspace.app.rest.Parameter;
 import org.dspace.app.rest.SearchRestMethod;
@@ -51,7 +52,7 @@ import org.springframework.stereotype.Component;
 public class PoolTaskRestRepository extends DSpaceRestRepository<PoolTaskRest, Integer>
                                    implements InitializingBean {

-    private static final Logger log = Logger.getLogger(PoolTaskRestRepository.class);
+    private static final Logger log = LogManager.getLogger();

    @Autowired
    ItemService itemService;
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/ProcessRestRepository.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/ProcessRestRepository.java
@@ -15,7 +15,8 @@ import java.util.UUID;
 import java.util.stream.Collectors;

 import org.apache.commons.lang3.StringUtils;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.Parameter;
 import org.dspace.app.rest.SearchRestMethod;
 import org.dspace.app.rest.converter.ConverterService;
@@ -49,7 +50,7 @@ import org.springframework.stereotype.Component;
@Component(ProcessRest.CATEGORY + "." + ProcessRest.NAME)
 public class ProcessRestRepository extends DSpaceRestRepository<ProcessRest, Integer> {

-    private static final Logger log = Logger.getLogger(ProcessRestRepository.class);
+    private static final Logger log = LogManager.getLogger();

    @Autowired
    private ProcessService processService;
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/RelationshipRestRepository.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/RelationshipRestRepository.java
@@ -16,7 +16,8 @@ import javax.servlet.http.HttpServletRequest;

 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.Parameter;
 import org.dspace.app.rest.SearchRestMethod;
 import org.dspace.app.rest.exception.RepositoryMethodNotImplementedException;
@@ -49,7 +50,7 @@ import org.springframework.stereotype.Component;
@Component(RelationshipRest.CATEGORY + "." + RelationshipRest.NAME)
 public class RelationshipRestRepository extends DSpaceRestRepository<RelationshipRest, Integer> {

-    private static final Logger log = Logger.getLogger(RelationshipRestRepository.class);
+    private static final Logger log = LogManager.getLogger();

    private static final String ALL = "all";
    private static final String LEFT = "left";
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/WorkflowItemRestRepository.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/repository/WorkflowItemRestRepository.java
@@ -16,7 +16,8 @@ import java.util.List;
 import java.util.UUID;
 import javax.servlet.http.HttpServletRequest;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.Parameter;
 import org.dspace.app.rest.SearchRestMethod;
 import org.dspace.app.rest.exception.DSpaceBadRequestException;
@@ -75,7 +76,7 @@ public class WorkflowItemRestRepository extends DSpaceRestRepository<WorkflowIte

    public static final String OPERATION_PATH_SECTIONS = "sections";

-    private static final Logger log = Logger.getLogger(WorkflowItemRestRepository.class);
+    private static final Logger log = LogManager.getLogger();

    @Autowired
    XmlWorkflowItemService wis;
@@ -202,7 +203,7 @@ public class WorkflowItemRestRepository extends DSpaceRestRepository<WorkflowIte

        this.checkIfEditMetadataAllowedInCurrentStep(context, source);

-        List<ErrorRest> errors = new ArrayList<ErrorRest>();
+        List<ErrorRest> errors = new ArrayList<>();
        SubmissionConfig submissionConfig =
            submissionConfigReader.getSubmissionConfigByName(wsi.getSubmissionDefinition().getName());
        for (int i = 0; i < submissionConfig.getNumberOfSteps(); i++) {
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/security/AnonymousAdditionalAuthorizationFilter.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/security/AnonymousAdditionalAuthorizationFilter.java
@@ -15,7 +15,8 @@ import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.utils.ContextUtil;
 import org.dspace.authenticate.service.AuthenticationService;
 import org.dspace.core.Context;
@@ -34,9 +35,9 @@ import org.springframework.security.web.authentication.www.BasicAuthenticationFi
 */
 public class AnonymousAdditionalAuthorizationFilter extends BasicAuthenticationFilter {

-    private static final Logger log = Logger.getLogger(AnonymousAdditionalAuthorizationFilter.class);
+    private static final Logger log = LogManager.getLogger();

-    private AuthenticationService authenticationService;
+    private final AuthenticationService authenticationService;

    /**
     * Constructor for the class
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/submit/step/validation/LicenseValidation.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/submit/step/validation/LicenseValidation.java
@@ -10,7 +10,8 @@ package org.dspace.app.rest.submit.step.validation;
 import java.sql.SQLException;
 import java.util.List;

-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.model.ErrorRest;
 import org.dspace.app.rest.repository.WorkspaceItemRestRepository;
 import org.dspace.app.rest.submit.SubmissionService;
@@ -32,7 +33,7 @@ public class LicenseValidation extends AbstractValidation {

    private static final String ERROR_VALIDATION_LICENSEREQUIRED = "error.validation.license.notgranted";

-    private static final Logger log = Logger.getLogger(LicenseValidation.class);
+    private static final Logger log = LogManager.getLogger();

    @Autowired
    private BitstreamService bitstreamService;
--- a/dspace-server-webapp/src/main/java/org/dspace/app/rest/utils/RestRepositoryUtils.java
+++ b/dspace-server-webapp/src/main/java/org/dspace/app/rest/utils/RestRepositoryUtils.java
@@ -12,7 +12,8 @@ import java.util.LinkedList;
 import java.util.List;

 import org.apache.commons.lang3.StringUtils;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.dspace.app.rest.Parameter;
 import org.dspace.app.rest.SearchRestMethod;
 import org.dspace.app.rest.exception.MissingParameterException;
@@ -49,7 +50,7 @@ public class RestRepositoryUtils {
    private static final String NAME_NOT_FOUND = "Unable to detect parameter names for query method %s! Use @Param or" +
        " compile with -parameters on JDK 8.";

-    private static final Logger log = Logger.getLogger(RestRepositoryUtils.class);
+    private static final Logger log = LogManager.getLogger();

    @Autowired(required = true)
    @Qualifier(value = "mvcConversionService")
@@ -78,7 +79,7 @@ public class RestRepositoryUtils {
     * @return the names of the search methods if any. Otherwise an empty list
     */
    public List<String> listSearchMethods(DSpaceRestRepository repository) {
-        List<String> searchMethods = new LinkedList<String>();
+        List<String> searchMethods = new LinkedList<>();
        for (Method method : repository.getClass().getMethods()) {
            // We need to use AnnotationUtils because the DSpaceRestRepository is possibly enhanced by a Spring AOP
            // proxy. The regular "method.getAnnotation()" method would then search the proxy instead of the
@@ -136,7 +137,7 @@ public class RestRepositoryUtils {
    public Object executeQueryMethod(DSpaceRestRepository repository, MultiValueMap<String, Object> parameters,
                                     Method method, Pageable pageable, Sort sort, PagedResourcesAssembler assembler) {

-        MultiValueMap<String, Object> result = new LinkedMultiValueMap<String, Object>(parameters);
+        MultiValueMap<String, Object> result = new LinkedMultiValueMap<>(parameters);
        MethodParameters methodParameters = new MethodParameters(method, PARAM_ANNOTATION);

        for (MethodParameter parameter : methodParameters.getParameters()) {
--- a/pom.xml
+++ b/pom.xml
@@ -116,6 +116,21 @@
                                </rules>
                            </configuration>
                        </execution>
+                        <execution>
+                            <id>ban-dependencies</id>
+                            <goals>
+                                <goal>enforce</goal>
+                            </goals>
+                            <configuration>
+                                <rules>
+                                    <bannedDependencies>
+                                        <excludes>
+                                            <exclude>log4j:log4j</exclude>
+                                        </excludes>
+                                    </bannedDependencies>
+                                </rules>
+                            </configuration>
+                        </execution>
                    </executions>
                </plugin>
                <!-- Used to compile all Java classes -->