diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/DenkXwebIndexer.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/DenkXwebIndexer.java
index b5763a57..f46c6af0 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/DenkXwebIndexer.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/DenkXwebIndexer.java
@@ -111,7 +111,7 @@ public List<String> addToIndex(Path denkxwebFile, Map<String, Boolean> reindexSe
                 logger.info("Created media folder {}", newMediaFolder.toAbsolutePath());
             }
         }
- 
+
         // Use existing folders for those missing in the hotfolder
         checkReindexSettings(dataFolders, reindexSettings);
 
@@ -342,23 +342,20 @@ private static void setSimpleData(IndexObject indexObj) {
         Element structNode = indexObj.getRootStructNode();
 
         // Set type
-        {
-            String value = structNode.getAttributeValue("type");
-            if (StringUtils.isNotEmpty(value)) {
-                indexObj.setType(MetadataConfigurationManager.mapDocStrct(value).trim());
-            } else {
-                indexObj.setType("monument");
-            }
-            logger.trace("TYPE: {}", indexObj.getType());
+        String type = structNode.getAttributeValue("type");
+        if (StringUtils.isNotEmpty(type)) {
+            indexObj.setType(MetadataConfigurationManager.mapDocStrct(type).trim());
+        } else {
+            indexObj.setType("monument");
         }
+        logger.trace("TYPE: {}", indexObj.getType());
 
         // Set label
-        {
-            String value = structNode.getAttributeValue("LABEL");
-            if (value != null) {
-                indexObj.setLabel(value);
-            }
+        String label = structNode.getAttributeValue("LABEL");
+        if (label != null) {
+            indexObj.setLabel(label);
         }
+
         logger.trace("LABEL: {}", indexObj.getLabel());
     }
 
@@ -368,11 +365,10 @@ private static void setSimpleData(IndexObject indexObj) {
      * @param dataFolders
      * @param pageCountStart
      * @param downloadExternalImages
-     * @throws FatalIndexerException
      * @should generate pages correctly
      */
     public void generatePageDocuments(ISolrWriteStrategy writeStrategy, Map<String, Path> dataFolders, int pageCountStart,
-            boolean downloadExternalImages) throws FatalIndexerException {
+            boolean downloadExternalImages) {
         String xpath = "//denkxweb:images/denkxweb:image";
         List<Element> eleImageList = xp.evaluateToElements(xpath, null);
         if (eleImageList == null || eleImageList.isEmpty()) {
diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/DublinCoreIndexer.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/DublinCoreIndexer.java
index e6dbacff..72c36280 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/DublinCoreIndexer.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/DublinCoreIndexer.java
@@ -529,7 +529,6 @@ private static List<LuceneField> mapPagesToDocstruct(IndexObject indexObj, ISolr
      * @param dataRepository a {@link io.goobi.viewer.indexer.model.datarepository.DataRepository} object.
      * @param pi a {@link java.lang.String} object.
      * @param pageCountStart a int.
-     * @throws io.goobi.viewer.indexer.exceptions.FatalIndexerException
      * @should create documents for all mapped pages
      * @should set correct ORDER values
      * @should skip unmapped pages
@@ -537,7 +536,7 @@ private static List<LuceneField> mapPagesToDocstruct(IndexObject indexObj, ISolr
      * @should maintain page order after parallel processing
      */
     public void generatePageDocuments(final ISolrWriteStrategy writeStrategy, final Map<String, Path> dataFolders,
-            final DataRepository dataRepository, final String pi, int pageCountStart) throws FatalIndexerException {
+            final DataRepository dataRepository, final String pi, int pageCountStart) {
         // Get all physical elements
         String xpath = "/record/dc:relation";
         List<Element> eleImageList = xp.evaluateToElements(xpath, null);
diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/Indexer.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/Indexer.java
index 493c4528..18a15f4f 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/Indexer.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/Indexer.java
@@ -610,11 +610,10 @@ List<SolrInputDocument> generateUserGeneratedContentDocsForPage(SolrInputDocumen
      * @param groupIds
      * @param order
      * @return Generated {@link SolrInputDocument}
-     * @throws FatalIndexerException
      * @should throw IllegalArgumentException if eleContent null
      */
     SolrInputDocument generateUserGeneratedContentDocForPage(Element eleContent, SolrInputDocument pageDoc, String pi,
-            String anchorPi, Map<String, String> groupIds, int order) throws FatalIndexerException {
+            String anchorPi, Map<String, String> groupIds, int order) {
         if (eleContent == null) {
             throw new IllegalArgumentException("eleContent may not be null");
         }
@@ -852,12 +851,11 @@ List<SolrInputDocument> generateUserCommentDocsForPage(SolrInputDocument pageDoc
      * @param anchorPi
      * @param groupIds
      * @return List<SolrInputDocument>
-     * @throws FatalIndexerException
      * @should return empty list if dataFolder null
      * @should create docs correctly
      */
     List<SolrInputDocument> generateAnnotationDocs(Map<Integer, SolrInputDocument> pageDocs, Path dataFolder, String pi, String anchorPi,
-            Map<String, String> groupIds) throws FatalIndexerException {
+            Map<String, String> groupIds) {
         if (dataFolder == null || !Files.isDirectory(dataFolder)) {
             logger.info("Annotation folder is empty.");
             return Collections.emptyList();
@@ -1012,7 +1010,7 @@ public SolrInputDocument readAnnotation(Path path, String iddoc, String pi, Stri
     protected void writeUserGeneratedContents(ISolrWriteStrategy writeStrategy, Map<String, Path> dataFolders, IndexObject indexObj)
             throws FatalIndexerException {
         // Collect page docs for annotation<->page mapping
-        Map<Integer, SolrInputDocument> pageDocs = new HashMap<>(writeStrategy.getPageDocsSize());
+        Map<Integer, SolrInputDocument> pageDocs = HashMap.newHashMap(writeStrategy.getPageDocsSize());
 
         // Add used-generated content docs from legacy crowdsourcing
         for (int i : writeStrategy.getPageOrderNumbers()) {
@@ -1231,10 +1229,9 @@ public static ImageReader getOpenJpegReader() {
      * @param pi Record identifier
      * @param writeStrategy
      * @return Number of added group docs
-     * @throws FatalIndexerException
      * @should add grouped metadata docs from given page to writeStrategy correctly
      */
-    public int addGroupedMetadataDocsForPage(PhysicalElement page, String pi, ISolrWriteStrategy writeStrategy) throws FatalIndexerException {
+    public int addGroupedMetadataDocsForPage(PhysicalElement page, String pi, ISolrWriteStrategy writeStrategy) {
         if (page == null) {
             throw new IllegalArgumentException("page may not be null");
         }
diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/LidoIndexer.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/LidoIndexer.java
index e08e7107..32122087 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/LidoIndexer.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/LidoIndexer.java
@@ -574,10 +574,9 @@ protected static List<LuceneField> mapPagesToDocstruct(IndexObject indexObj, ISo
      * @param imageXPaths a {@link java.util.List} object.
      * @param downloadExternalImages a boolean.
      * @param useOldImageFolderIfAvailable
-     * @throws io.goobi.viewer.indexer.exceptions.FatalIndexerException
      */
     public void generatePageDocuments(ISolrWriteStrategy writeStrategy, Map<String, Path> dataFolders, int pageCountStart,
-            List<String> imageXPaths, boolean downloadExternalImages, boolean useOldImageFolderIfAvailable) throws FatalIndexerException {
+            List<String> imageXPaths, boolean downloadExternalImages, boolean useOldImageFolderIfAvailable) {
         String xpath = "/lido:lido/lido:administrativeMetadata/lido:resourceWrap/lido:resourceSet";
         List<Element> resourceSetList = xp.evaluateToElements(xpath, null);
         if (resourceSetList == null || resourceSetList.isEmpty()) {
diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/MetsIndexer.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/MetsIndexer.java
index 864cfdce..c57352ec 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/MetsIndexer.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/MetsIndexer.java
@@ -1161,7 +1161,7 @@ PhysicalElement generatePageDocument(Element eleStructMapPhysical, String iddoc,
                 return null;
             }
         }
-        logger.trace("generatePageDocument: {} (IDDOC {}) processed by thread {}", id, iddoc, Thread.currentThread().getId());
+        logger.trace("generatePageDocument: {} (IDDOC {}) processed by thread {}", id, iddoc, Thread.currentThread().threadId());
         // Check whether this physical element is mapped to any logical element, skip if not
         StringBuilder sbXPath = new StringBuilder(70);
         sbXPath.append("/mets:mets/mets:structLink/mets:smLink[@xlink:to=\"").append(id).append("\"]");
diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/UsageStatisticsIndexer.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/UsageStatisticsIndexer.java
index 932514b1..255ae401 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/UsageStatisticsIndexer.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/UsageStatisticsIndexer.java
@@ -119,7 +119,7 @@ SolrInputDocument index(Path sourceFile) throws IOException, FatalIndexerExcepti
 
     /**
      * @param solrDateString
-     * @return
+     * @return a boolean
      * @throws IOException
      * @throws SolrServerException
      */
@@ -131,10 +131,9 @@ private static boolean statisticsExists(String solrDateString) throws SolrServer
 
     /**
      * @param stats
-     * @return
-     * @throws FatalIndexerException
+     * @return {@link IndexObject}
      */
-    private static IndexObject createIndexObject(DailyUsageStatistics stats) throws FatalIndexerException {
+    private static IndexObject createIndexObject(DailyUsageStatistics stats) {
         IndexObject indexObj = new IndexObject(getNextIddoc());
         indexObj.addToLucene(SolrConstants.IDDOC, indexObj.getIddoc());
         indexObj.addToLucene(SolrConstants.GROUPFIELD, indexObj.getIddoc());
@@ -183,7 +182,7 @@ public boolean removeFromIndex(Path sourceFile) throws FatalIndexerException {
     /**
      * 
      * @param sourceFile
-     * @return
+     * @return {@link String}
      */
     private static String getStatisticsDate(Path sourceFile) {
         String dateString = sourceFile.getFileName().toString().replaceAll("statistics-usage-([\\d-]+).\\w+", "$1");
diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/Version.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/Version.java
index 818be4d3..e048d179 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/Version.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/Version.java
@@ -18,7 +18,8 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.StringWriter;
-import java.net.URL;
+import java.net.URI;
+import java.net.URISyntaxException;
 import java.nio.charset.StandardCharsets;
 import java.time.LocalDateTime;
 import java.util.regex.Matcher;
@@ -83,12 +84,12 @@ private static String getManifestStringFromJar() {
         String manifestPath = classPath.substring(0, classPath.lastIndexOf("/io/goobi")) + "/META-INF/MANIFEST.MF";
         logger.trace(manifestPath);
 
-        try (InputStream inputStream = new URL(manifestPath).openStream()) {
+        try (InputStream inputStream = new URI(manifestPath).toURL().openStream()) {
             StringWriter writer = new StringWriter();
             IOUtils.copy(inputStream, writer, StandardCharsets.UTF_8);
             String manifestString = writer.toString();
             value = manifestString;
-        } catch (IOException e) {
+        } catch (IOException | URISyntaxException e) {
             return null;
         }
 
diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/WorldViewsIndexer.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/WorldViewsIndexer.java
index 6436b781..5a2cd476 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/WorldViewsIndexer.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/WorldViewsIndexer.java
@@ -16,7 +16,6 @@
 package io.goobi.viewer.indexer;
 
 import java.io.IOException;
-import java.io.UnsupportedEncodingException;
 import java.nio.file.DirectoryStream;
 import java.nio.file.FileAlreadyExistsException;
 import java.nio.file.Files;
@@ -720,7 +719,6 @@ private void finalizeChildDocstruct(IndexObject indexObj, Map<String, Path> data
      * @param pi
      * @param pageCountStart a int.
      * @throws InterruptedException
-     * @throws io.goobi.viewer.indexer.exceptions.FatalIndexerException
      * @should create documents for all mapped pages
      * @should set correct ORDER values
      * @should skip unmapped pages
@@ -728,7 +726,7 @@ private void finalizeChildDocstruct(IndexObject indexObj, Map<String, Path> data
      * @should maintain page order after parallel processing
      */
     public void generatePageDocuments(final ISolrWriteStrategy writeStrategy, final Map<String, Path> dataFolders, final String pi,
-            int pageCountStart) throws InterruptedException, FatalIndexerException {
+            int pageCountStart) throws InterruptedException {
         // Get all physical elements
         List<Element> eleListImages = xp.evaluateToElements("worldviews/resource/images/image", null);
         logger.info("Generating {} page documents (count starts at {})...", eleListImages.size(), pageCountStart);
@@ -785,7 +783,7 @@ PhysicalElement generatePageDocument(Element eleImage, String iddoc, String pi,
         }
 
         int useOrder = order != null ? order : Integer.parseInt(eleImage.getChildText("sequence"));
-        logger.trace("generatePageDocument: {} (IDDOC {}) processed by thread {}", useOrder, iddoc, Thread.currentThread().getId());
+        logger.trace("generatePageDocument: {} (IDDOC {}) processed by thread {}", useOrder, iddoc, Thread.currentThread().threadId());
 
         // Create object for this page
         PhysicalElement ret = createPhysicalElement(order, iddoc, "PHYS_" + MetadataHelper.FORMAT_FOUR_DIGITS.get().format(useOrder));
@@ -847,9 +845,8 @@ PhysicalElement generatePageDocument(Element eleImage, String iddoc, String pi,
      * @param indexObj {@link IndexObject}
      * @param hotfolder
      * @param dataRepository
-     * @throws UnsupportedEncodingException
      */
-    static void copyAndReIndexAnchor(IndexObject indexObj, Hotfolder hotfolder, DataRepository dataRepository) throws UnsupportedEncodingException {
+    static void copyAndReIndexAnchor(IndexObject indexObj, Hotfolder hotfolder, DataRepository dataRepository) {
         logger.debug("copyAndReIndexAnchor: {}", indexObj.getPi());
         if (indexObj.getParent() != null) {
             String piParent = indexObj.getParent().getPi();
diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/Configuration.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/Configuration.java
index e7558cbe..ee82d4ab 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/Configuration.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/Configuration.java
@@ -16,6 +16,8 @@
 package io.goobi.viewer.indexer.helper;
 
 import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -667,12 +669,13 @@ public List<String> getProxyWhitelist() {
      * <p>isHostProxyWhitelisted.</p>
      *
      * @param url
+     * @return a boolean
      * @throws MalformedURLException
+     * @throws URISyntaxException 
      * @should return true if host whitelisted
-     * @return a boolean
      */
-    public boolean isHostProxyWhitelisted(String url) throws MalformedURLException {
-        URL urlAsURL = new URL(url);
+    public boolean isHostProxyWhitelisted(String url) throws MalformedURLException, URISyntaxException {
+        URL urlAsURL = new URI(url).toURL();
         return getProxyWhitelist().contains(urlAsURL.getHost());
     }
 
diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/MetadataHelper.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/MetadataHelper.java
index 690320b4..cc1cf0e4 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/MetadataHelper.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/MetadataHelper.java
@@ -17,6 +17,7 @@
 
 import java.io.IOException;
 import java.net.MalformedURLException;
+import java.net.URISyntaxException;
 import java.nio.file.DirectoryStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -509,7 +510,7 @@ private static List<LuceneField> retrieveAuthorityData(final String authorityUrl
                     proxyUrl = SolrIndexerDaemon.getInstance().getConfiguration().getProxyUrl();
                     proxyPort = SolrIndexerDaemon.getInstance().getConfiguration().getProxyPort();
                 }
-            } catch (MalformedURLException e) {
+            } catch (MalformedURLException | URISyntaxException e) {
                 logger.error(e.getMessage());
             }
 
diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/SolrSearchIndex.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/SolrSearchIndex.java
index aa61d19a..6603ea3d 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/SolrSearchIndex.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/SolrSearchIndex.java
@@ -872,7 +872,7 @@ public Set<String> checkDuplicateFieldValues(List<String> fields, List<String> v
             return Collections.emptySet();
         }
 
-        Set<String> ret = new HashSet<>(found.size());
+        Set<String> ret = HashSet.newHashSet(found.size());
         for (SolrDocument doc : found) {
             if (doc.containsKey(SolrConstants.PI_TOPSTRUCT)) {
                 ret.add((String) doc.getFieldValue(SolrConstants.PI_TOPSTRUCT));
diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/Utils.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/Utils.java
index ed1ec1ac..022431d7 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/Utils.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/helper/Utils.java
@@ -18,6 +18,7 @@
 import java.io.IOException;
 import java.io.StringWriter;
 import java.io.UnsupportedEncodingException;
+import java.net.URI;
 import java.net.URL;
 import java.net.URLDecoder;
 import java.net.URLEncoder;
@@ -35,22 +36,11 @@
 import java.util.Map.Entry;
 import java.util.Properties;
 
-import jakarta.mail.Message;
-import jakarta.mail.MessagingException;
-import jakarta.mail.PasswordAuthentication;
-import jakarta.mail.Session;
-import jakarta.mail.Transport;
-import jakarta.mail.internet.InternetAddress;
-import jakarta.mail.internet.MimeBodyPart;
-import jakarta.mail.internet.MimeMessage;
-import jakarta.mail.internet.MimeMultipart;
-
 import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.FilenameUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.http.HttpStatus;
 import org.apache.http.NameValuePair;
-import org.apache.http.client.ClientProtocolException;
 import org.apache.http.client.CookieStore;
 import org.apache.http.client.config.RequestConfig;
 import org.apache.http.client.entity.UrlEncodedFormEntity;
@@ -77,9 +67,17 @@
 import io.goobi.viewer.indexer.MetsIndexer;
 import io.goobi.viewer.indexer.SolrIndexerDaemon;
 import io.goobi.viewer.indexer.Version;
-import io.goobi.viewer.indexer.exceptions.FatalIndexerException;
 import io.goobi.viewer.indexer.exceptions.HTTPException;
 import io.goobi.viewer.indexer.model.SolrConstants;
+import jakarta.mail.Message;
+import jakarta.mail.MessagingException;
+import jakarta.mail.PasswordAuthentication;
+import jakarta.mail.Session;
+import jakarta.mail.Transport;
+import jakarta.mail.internet.InternetAddress;
+import jakarta.mail.internet.MimeBodyPart;
+import jakarta.mail.internet.MimeMessage;
+import jakarta.mail.internet.MimeMultipart;
 
 /**
  * <p>
@@ -157,7 +155,9 @@ public static boolean deleteDirectory(Path path) {
     }
 
     /**
-     * <p>updateDataRepositoryCache.</p>
+     * <p>
+     * updateDataRepositoryCache.
+     * </p>
      *
      * @param pi a {@link java.lang.String} object
      * @param dataRepositoryName a {@link java.lang.String} object
@@ -170,7 +170,9 @@ public static void updateDataRepositoryCache(String pi, String dataRepositoryNam
     }
 
     /**
-     * <p>prerenderPdfs.</p>
+     * <p>
+     * prerenderPdfs.
+     * </p>
      *
      * @param pi a {@link java.lang.String} object
      * @param forceUpdate a boolean
@@ -186,7 +188,9 @@ public static void prerenderPdfs(String pi, boolean forceUpdate) throws IOExcept
     }
 
     /**
-     * <p>updateDataRepositoryCache.</p>
+     * <p>
+     * updateDataRepositoryCache.
+     * </p>
      *
      * @param pi a {@link java.lang.String} object
      * @param dataRepositoryName a {@link java.lang.String} object
@@ -215,14 +219,16 @@ public static void updateDataRepositoryCache(String pi, String dataRepositoryNam
         json.put("dataRepositoryName", dataRepositoryName);
 
         String url = viewerUrl + "/api/v1/tasks/";
-        Map<String, String> headerParams = new HashMap<>(2);
+        Map<String, String> headerParams = HashMap.newHashMap(2);
         headerParams.put(HTTP_HEADER_CONTENT_TYPE, ContentType.APPLICATION_JSON.getMimeType());
         headerParams.put("token", token);
         getWebContentPOST(url, Collections.emptyMap(), null, json.toString(), headerParams);
     }
 
     /**
-     * <p>prerenderPdfs.</p>
+     * <p>
+     * prerenderPdfs.
+     * </p>
      *
      * @param pi a {@link java.lang.String} object
      * @param force a boolean
@@ -250,7 +256,7 @@ public static void prerenderPdfs(String pi, boolean force, String config, String
         json.put("variant", config);
 
         String url = viewerUrl + "/api/v1/tasks/";
-        Map<String, String> headerParams = new HashMap<>(2);
+        Map<String, String> headerParams = HashMap.newHashMap(2);
         headerParams.put(HTTP_HEADER_CONTENT_TYPE, ContentType.APPLICATION_JSON.getMimeType());
         headerParams.put("token", token);
         getWebContentPOST(url, Collections.emptyMap(), null, json.toString(), headerParams);
@@ -275,7 +281,7 @@ public static void submitDataToViewer(List<String> identifiers, long fileCount)
             json.put("hotfolder-file-count", fileCount);
             json.put("record-identifiers", identifiers);
 
-            getWebContentPUT(url, new HashMap<>(0), null, json.toString(),
+            getWebContentPUT(url, HashMap.newHashMap(0), null, json.toString(),
                     Collections.singletonMap(HTTP_HEADER_CONTENT_TYPE, ContentType.APPLICATION_JSON.getMimeType()));
             logger.info("Version and file count ({}) submitted to Goobi viewer.", fileCount);
             if (!identifiers.isEmpty()) {
@@ -625,7 +631,7 @@ public static String removeRecordImagesFromCache(String pi) {
                 .append(SolrIndexerDaemon.getInstance().getConfiguration().getViewerAuthorizationToken());
 
         try {
-            String jsonString = Utils.getWebContentDELETE(sbUrl.toString(), new HashMap<>(0), null, null,
+            String jsonString = Utils.getWebContentDELETE(sbUrl.toString(), HashMap.newHashMap(0), null, null,
                     Collections.singletonMap(HTTP_HEADER_CONTENT_TYPE, ContentType.APPLICATION_JSON.getMimeType()));
             if (StringUtils.isNotEmpty(jsonString)) {
                 return (String) new JSONObject(jsonString).get("message");
@@ -637,7 +643,9 @@ public static String removeRecordImagesFromCache(String pi) {
     }
 
     /**
-     * <p>isValidURL.</p>
+     * <p>
+     * isValidURL.
+     * </p>
      *
      * @param urlString URL to check
      * @return true if valid; false otherwise
@@ -648,7 +656,7 @@ public static String removeRecordImagesFromCache(String pi) {
      */
     public static boolean isValidURL(String urlString) {
         try {
-            URL url = new URL(urlString);
+            URL url = new URI(urlString).toURL();
             url.toURI();
             return true;
         } catch (Exception e) {
@@ -732,7 +740,9 @@ public static String extractPiFromFileName(Path file) {
     }
 
     /**
-     * <p>isFileNameMatchesRegex.</p>
+     * <p>
+     * isFileNameMatchesRegex.
+     * </p>
      *
      * @param fileName a {@link java.lang.String} object
      * @param regexes an array of {@link java.lang.String} objects
@@ -786,7 +796,9 @@ public static String getFileNameFromIiifUrl(String url) {
     }
 
     /**
-     * <p>generateLongOrderNumber.</p>
+     * <p>
+     * generateLongOrderNumber.
+     * </p>
      *
      * @param prefix a int
      * @param count a int
diff --git a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/model/IndexObject.java b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/model/IndexObject.java
index c7ac9ad1..476f5fef 100644
--- a/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/model/IndexObject.java
+++ b/goobi-viewer-indexer/src/main/java/io/goobi/viewer/indexer/model/IndexObject.java
@@ -501,7 +501,7 @@ public void addChildMetadata(List<IndexObject> childObjectList) {
      * @should add existence booleans correctly
      */
     public void applyFinalModifications() {
-        Set<String> existingFields = new HashSet<>(luceneFields.size());
+        Set<String> existingFields = HashSet.newHashSet(luceneFields.size());
         Set<String> alreadyFinishedFields = new HashSet<>();
 
         // Collect existing metadata fields