diff --git a/build.gradle b/build.gradle
index b6b611a..85271a0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,12 +1,12 @@
 plugins {
-    id 'org.springframework.boot' version '2.7.17'
-    id 'io.spring.dependency-management' version '1.1.3'
+    id 'org.springframework.boot' version '2.7.18'
+    id 'io.spring.dependency-management' version '1.1.4'
     id 'java'
 }
 
 java {
     group = 'eu.openaire.urls_controller'
-    version = '2.6.0-SNAPSHOT'
+    version = '2.7.0-SNAPSHOT'
     sourceCompatibility = JavaVersion.VERSION_1_8
 }
 
@@ -46,15 +46,15 @@ dependencies {
     implementation group: 'com.google.guava', name: 'guava', version: '32.1.3-jre'
 
     // https://mvnrepository.com/artifact/org.apache.commons/commons-lang3
-    implementation group: 'org.apache.commons', name: 'commons-lang3', version: '3.13.0'
+    implementation group: 'org.apache.commons', name: 'commons-lang3', version: '3.14.0'
 
     // https://mvnrepository.com/artifact/org.apache.commons/commons-compress
-    implementation("org.apache.commons:commons-compress:1.24.0") {
+    implementation("org.apache.commons:commons-compress:1.25.0") {
         exclude group: 'com.github.luben', module: 'zstd-jni'
     }
-    implementation 'com.github.luben:zstd-jni:1.5.5-6'  // Even though this is part of the above dependency, the Apache commons rarely updates it, while the zstd team makes improvements very often.
+    implementation 'com.github.luben:zstd-jni:1.5.5-10'  // Even though this is part of the above dependency, the Apache commons rarely updates it, while the zstd team makes improvements very often.
 
-    implementation 'io.minio:minio:8.5.6'
+    implementation 'io.minio:minio:8.5.7'
 
     // https://mvnrepository.com/artifact/com.cloudera.impala/jdbc
     implementation("com.cloudera.impala:jdbc:2.5.31") {
@@ -120,7 +120,7 @@ dependencies {
 
 
     // https://mvnrepository.com/artifact/io.micrometer/micrometer-registry-prometheus
-    runtimeOnly 'io.micrometer:micrometer-registry-prometheus:1.11.5'
+    runtimeOnly 'io.micrometer:micrometer-registry-prometheus:1.12.0'
 
     testImplementation 'org.springframework.security:spring-security-test'
     testImplementation "org.springframework.boot:spring-boot-starter-test"
diff --git a/src/main/java/eu/openaire/urls_controller/components/ScheduledTasks.java b/src/main/java/eu/openaire/urls_controller/components/ScheduledTasks.java
index 8dc5760..24ff7cb 100644
--- a/src/main/java/eu/openaire/urls_controller/components/ScheduledTasks.java
+++ b/src/main/java/eu/openaire/urls_controller/components/ScheduledTasks.java
@@ -110,9 +110,14 @@ public class ScheduledTasks {
                 future = UrlsController.futuresOfBackgroundTasks.get(i);
                 if ( ! future.get() )   // Get and see if an exception is thrown. This blocks the current thread, until the task of the future has finished.
                     numFailedTasks ++;
-            } catch (ExecutionException ee) {
-                String stackTraceMessage = GenericUtils.getSelectiveStackTrace(ee, null, 15);	// These can be serious errors like an "out of memory exception" (Java HEAP).
-                logger.error("Background task_" + i + " failed with: " + ee.getMessage() + GenericUtils.endOfLine + stackTraceMessage);
+            } catch (ExecutionException ee) {   // These can be serious errors like an "out of memory exception" (Java HEAP).
+                // The stacktrace of the "ExecutionException" is the one of thi code and not the code which ran inside the background-task. Try to get the cause.
+                Throwable throwable = ee.getCause();
+                if ( throwable == null ) {
+                    logger.warn("No cause was retrieved for the \"ExecutionException\"!");
+                    throwable = ee;
+                }
+                logger.error(GenericUtils.getSelectiveStackTrace(throwable, "Background task_" + i + " failed with: " + throwable.getMessage(), 30));
                 numFailedTasks ++;
             } catch (CancellationException ce) {
                 logger.error("Background task_" + i + " was cancelled: " + ce.getMessage());
@@ -231,21 +236,20 @@ public class ScheduledTasks {
         inspectWorkerReportsAndTakeAction(ActionForWorkerReports.delete_old);
     }
 
-    private static final double daysToWaitBeforeDeletion = 7.0;
 
 
-    @Scheduled(initialDelay = 604_800_000, fixedDelay = 604_800_000)  // Run every 7 days.
-    //@Scheduled(initialDelay = 1_200_000, fixedDelay = 1_200_000)    // Just for testing (every 1200 secs).
+    @Scheduled(initialDelay = 259_200_000, fixedDelay = 259_200_000)    // Run every 3 days. 3 days after startup.
+    //@Scheduled(initialDelay = 1_200_000, fixedDelay = 1_200_000)  // Just for testing (every 1200 secs).
     public void checkAndDeleteUnhandledAssignments()
     {
-        // Remove the assignments having a "date" older than 7 days.
+        // Remove the assignments having a "date" older than 3 days.
 
         // For some reason, sometimes, the worker cannot receive the assignments in time.
         // In this case, no job is created for those assignments nd no workerReport gets stored in storage.
         // The assignments just remain in the table, and the urls cannot be rechecked.
 
         Calendar calendar = Calendar.getInstance();
-        calendar.add(Calendar.DAY_OF_MONTH, - (int) daysToWaitBeforeDeletion);  // Subtract <daysToWaitBeforeDeletion> from current Date.
+        calendar.add(Calendar.DAY_OF_MONTH, - 3);  // Subtract <daysToWaitBeforeDeletion> from current Date.
 
         DatabaseConnector.databaseLock.lock();
         urlsService.deleteAssignmentsWithOlderDate(calendar.getTimeInMillis()); // Any error-log is written inside.
@@ -312,6 +316,8 @@ public class ScheduledTasks {
     private static StringBuilder jsonStringBuilder = null;
     private static final int daysDivisor = (1000 * 60 * 60 * 24);    // In order to get the time-difference in days. We divide with: /1000 to get seconds, /60 to get minutes, /60 to get hours and /24 to get days.
 
+    private static final double daysToWaitBeforeDeletion = 7.0;
+
 
     private void inspectWorkerReportsAndTakeAction(ActionForWorkerReports actionForWorkerReports)
     {
diff --git a/src/main/java/eu/openaire/urls_controller/util/GenericUtils.java b/src/main/java/eu/openaire/urls_controller/util/GenericUtils.java
index e77ca78..558cb8d 100644
--- a/src/main/java/eu/openaire/urls_controller/util/GenericUtils.java
+++ b/src/main/java/eu/openaire/urls_controller/util/GenericUtils.java
@@ -27,7 +27,7 @@ public class GenericUtils {
         StackTraceElement[] stels = thr.getStackTrace();
         StringBuilder sb = new StringBuilder(numOfLines *100);
         if ( initialMessage != null )
-            sb.append(initialMessage).append(" Stacktrace:").append(GenericUtils.endOfLine);	// This StringBuilder is thread-safe as a local-variable.
+            sb.append(initialMessage).append(" | Stacktrace:").append(GenericUtils.endOfLine);	// This StringBuilder is thread-safe as a local-variable.
         for ( int i = 0; (i < stels.length) && (i <= numOfLines); ++i ) {
             sb.append(stels[i]);
             if (i < numOfLines) sb.append(GenericUtils.endOfLine);