diff --git a/src/main/java/net/geant/nmaas/externalservices/kubernetes/RemoteClusterManager.java b/src/main/java/net/geant/nmaas/externalservices/kubernetes/RemoteClusterManager.java
index 1ce39f84be89c9de640fbd791ff103417be68e18..c99ac38a4fe8fdfbd0426ed4d25f8d3b351b13bb 100644
--- a/src/main/java/net/geant/nmaas/externalservices/kubernetes/RemoteClusterManager.java
+++ b/src/main/java/net/geant/nmaas/externalservices/kubernetes/RemoteClusterManager.java
@@ -243,9 +243,11 @@ public class RemoteClusterManager implements ClusterMonitoringService {
         }
     }
 
-    private RemoteClusterView toView(KCluster KCluster) {
-        RemoteClusterView view = modelMapper.map(KCluster, RemoteClusterView.class);
-        view.setDomainNames(KCluster.getDomains().stream().map(Domain::getName).toList());
+    private RemoteClusterView toView(KCluster kCluster) {
+        RemoteClusterView view = modelMapper.map(kCluster, RemoteClusterView.class);
+        if (Objects.nonNull(kCluster.getDomains())) {
+            view.setDomainNames(kCluster.getDomains().stream().map(Domain::getName).toList());
+        }
         return view;
     }
 
diff --git a/src/main/java/net/geant/nmaas/portal/api/configuration/ConfigurationController.java b/src/main/java/net/geant/nmaas/portal/api/configuration/ConfigurationController.java
index 0b18e8e646d7d548690b4985293e4ecc3afb0edd..9b8856c98405e56017fcb18151d605e19d18dcad 100644
--- a/src/main/java/net/geant/nmaas/portal/api/configuration/ConfigurationController.java
+++ b/src/main/java/net/geant/nmaas/portal/api/configuration/ConfigurationController.java
@@ -1,28 +1,31 @@
 package net.geant.nmaas.portal.api.configuration;
 
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
 import net.geant.nmaas.portal.exceptions.ConfigurationNotFoundException;
 import net.geant.nmaas.portal.exceptions.OnlyOneConfigurationSupportedException;
 import net.geant.nmaas.portal.service.ConfigurationManager;
-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.security.access.prepost.PreAuthorize;
-import org.springframework.web.bind.annotation.*;
-
-import jakarta.validation.Valid;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestController;
 
 @RestController
 @RequestMapping(value = "/api/configuration")
+@RequiredArgsConstructor
 public class ConfigurationController {
 
-    private ConfigurationManager configurationManager;
-
-    @Autowired
-    public ConfigurationController(ConfigurationManager configurationManager) {
-        this.configurationManager = configurationManager;
-    }
+    private final ConfigurationManager configurationManager;
 
     @GetMapping
-    public ConfigurationView getConfiguration(){
+    public ConfigurationView getConfiguration() {
         return this.configurationManager.getConfiguration();
     }
 
@@ -33,7 +36,7 @@ public class ConfigurationController {
         return this.configurationManager.setConfiguration(configuration);
     }
 
-    @PutMapping(value="/{id}")
+    @PutMapping(value = "/{id}")
     @PreAuthorize("hasRole('ROLE_SYSTEM_ADMIN')")
     @ResponseStatus(code = HttpStatus.NO_CONTENT)
     public void updateConfiguration(@PathVariable("id") Long id, @RequestBody @Valid ConfigurationView configuration) {
@@ -42,13 +45,13 @@ public class ConfigurationController {
 
     @ExceptionHandler(OnlyOneConfigurationSupportedException.class)
     @ResponseStatus(code = HttpStatus.NOT_FOUND)
-    public String handleOnlyOneConfigurationSupportedException(OnlyOneConfigurationSupportedException e){
+    public String handleOnlyOneConfigurationSupportedException(OnlyOneConfigurationSupportedException e) {
         return e.getMessage();
     }
 
     @ExceptionHandler(ConfigurationNotFoundException.class)
     @ResponseStatus(code = HttpStatus.NOT_ACCEPTABLE)
-    public String handleConfigurationNotFoundException(ConfigurationNotFoundException e){
+    public String handleConfigurationNotFoundException(ConfigurationNotFoundException e) {
         return e.getMessage();
     }
 }
diff --git a/src/main/java/net/geant/nmaas/portal/api/info/GeneralInformationController.java b/src/main/java/net/geant/nmaas/portal/api/info/GeneralInformationController.java
index cd5c594332442a04c1f2c03da621c95653d4a154..c133e7f0f37ae08079b851200af39bb4951fe968 100644
--- a/src/main/java/net/geant/nmaas/portal/api/info/GeneralInformationController.java
+++ b/src/main/java/net/geant/nmaas/portal/api/info/GeneralInformationController.java
@@ -26,8 +26,8 @@ public class GeneralInformationController {
 
     @GetMapping(value = "/changelog", produces = "application/json")
     public FileSystemResource getChangelog() throws IOException {
-        Path tempJsonFile = Files.createTempFile("changelog",".json");
-        try(InputStream inputStream = changelogPath.getInputStream()) {
+        Path tempJsonFile = Files.createTempFile("changelog", ".json");
+        try (InputStream inputStream = changelogPath.getInputStream()) {
             Files.copy(inputStream, tempJsonFile, StandardCopyOption.REPLACE_EXISTING);
         }
         return new FileSystemResource(tempJsonFile);
diff --git a/src/main/java/net/geant/nmaas/portal/persistent/repositories/AppInstanceRepository.java b/src/main/java/net/geant/nmaas/portal/persistent/repositories/AppInstanceRepository.java
index 0618dddce5eb216fbdb42dd90bacd2022d72fd81..5d0d2852ffb6494daa02d5401a98fcad69b8e9a7 100644
--- a/src/main/java/net/geant/nmaas/portal/persistent/repositories/AppInstanceRepository.java
+++ b/src/main/java/net/geant/nmaas/portal/persistent/repositories/AppInstanceRepository.java
@@ -41,7 +41,7 @@ public interface AppInstanceRepository extends JpaRepository<AppInstance, Long>
 
     @Modifying
     @Query("update AppInstance ai set ai.application = :application, ai.previousApplicationId = :previousApplicationId where ai.id = :id")
-    void updateApplication(@Param(value = "id") long id, @Param(value = "previousApplicationId") long previousApplicationId, @Param(value = "application") Application application);
+    void updateApplication(@Param(value = "id") Long id, @Param(value = "previousApplicationId") Long previousApplicationId, @Param(value = "application") Application application);
 
     @Query("SELECT COUNT(ai.id) FROM AppInstance ai JOIN AppDeployment ad ON ad.deploymentId = ai.internalId WHERE ai.name = :name AND ai.domain.codename = :domain AND ad.state NOT IN" +
             "('APPLICATION_REMOVED'," +
@@ -51,16 +51,16 @@ public interface AppInstanceRepository extends JpaRepository<AppInstance, Long>
     int isNameAvailableInDomain(@Param(value = "name") String name, @Param(value = "domain") String domain);
 
     @Query("SELECT COUNT(ai.id) FROM AppInstance ai WHERE ai.createdAt >= :sinceTime")
-    int countAllDeployedSince(@Param("sinceTime") long sinceTime);
+    int countAllDeployedSince(@Param("sinceTime") Long sinceTime);
 
     @Query("SELECT COUNT(ai.id) FROM AppInstance ai WHERE ai.createdAt >= :sinceTime AND ai.createdAt < :endTime")
-    int countAllDeployedInTimePeriod(@Param("sinceTime") long sinceTime, @Param("endTime") long endTime);
+    int countAllDeployedInTimePeriod(@Param("sinceTime") Long sinceTime, @Param("endTime") Long endTime);
 
     @Query("SELECT COUNT(ai.id) FROM AppInstance ai JOIN AppDeployment ad ON ad.deploymentId = ai.internalId WHERE ai.application.name = ?1")
     int countByName(String name);
 
     @Query("SELECT ai FROM AppInstance ai WHERE ai.createdAt >= :sinceTime AND ai.createdAt <= :endTime")
-    List<AppInstance> findAllInTimePeriod(@Param("sinceTime") long sinceTime, @Param("endTime") long endTime);
+    List<AppInstance> findAllInTimePeriod(@Param("sinceTime") Long sinceTime, @Param("endTime") Long endTime);
 
     int countAllByOwner(User user);
 
diff --git a/src/main/java/net/geant/nmaas/portal/service/impl/DashboardServiceImpl.java b/src/main/java/net/geant/nmaas/portal/service/impl/DashboardServiceImpl.java
index 68fc4b82fc12972b6c600f9cdf2481c8b72837f4..3ff7e127998e89caafc05c910a4c0854cc653818 100644
--- a/src/main/java/net/geant/nmaas/portal/service/impl/DashboardServiceImpl.java
+++ b/src/main/java/net/geant/nmaas/portal/service/impl/DashboardServiceImpl.java
@@ -75,7 +75,7 @@ public class DashboardServiceImpl implements DashboardService {
                 .instanceCountInPeriod(appInstanceRepository.countAllDeployedInTimePeriod(startTimeStamp, endTimeStamp))
                 .instanceCountInPeriodDetails(deploymentsViews)
                 .popularApps(applicationDeploymentCountPerName).build();
-        log.info("Response: {}", systemView.toString());
+        log.debug("Response: {}", systemView.toString());
         return systemView;
     }
 
@@ -116,7 +116,7 @@ public class DashboardServiceImpl implements DashboardService {
                     .applicationDeployed(appsDeployed)
                     .applicationUpgradeStatus(upgradePossible)
                     .build();
-            log.info("Response: {}", view.toString());
+            log.debug("Response: {}", view.toString());
             return view;
         } else {
             log.error("Domain {} not present. Returning empty...", domainId);