diff --git a/plugins/metrics/src/main/java/org/apache/cloudstack/metrics/MetricsServiceImpl.java b/plugins/metrics/src/main/java/org/apache/cloudstack/metrics/MetricsServiceImpl.java
index 320660417dc5..0a6e6e8f4fd7 100644
--- a/plugins/metrics/src/main/java/org/apache/cloudstack/metrics/MetricsServiceImpl.java
+++ b/plugins/metrics/src/main/java/org/apache/cloudstack/metrics/MetricsServiceImpl.java
@@ -789,7 +789,7 @@ public List<ClusterMetricsResponse> listClusterMetrics(Pair<List<ClusterResponse
                 Double imbalance = ClusterDrsAlgorithm.getClusterImbalance(clusterId, cpuList, memoryList, null);
                 metricsResponse.setDrsImbalance(imbalance.isNaN() ? null : 100.0 * imbalance);
             } catch (ConfigurationException e) {
-                LOGGER.warn("Failed to get cluster imbalance for cluster " + clusterId, e);
+                logger.warn("Failed to get cluster imbalance for cluster " + clusterId, e);
             }
 
             metricsResponse.setState(clusterResponse.getAllocationState(), clusterResponse.getManagedState());
diff --git a/plugins/storage/volume/linstor/src/main/java/com/cloud/hypervisor/kvm/storage/LinstorStoragePool.java b/plugins/storage/volume/linstor/src/main/java/com/cloud/hypervisor/kvm/storage/LinstorStoragePool.java
index 4077d5dadfd0..2d6801049a3f 100644
--- a/plugins/storage/volume/linstor/src/main/java/com/cloud/hypervisor/kvm/storage/LinstorStoragePool.java
+++ b/plugins/storage/volume/linstor/src/main/java/com/cloud/hypervisor/kvm/storage/LinstorStoragePool.java
@@ -34,11 +34,12 @@
 import com.google.gson.JsonParser;
 import com.google.gson.JsonSyntaxException;
 import org.apache.cloudstack.utils.qemu.QemuImg;
-import org.apache.log4j.Logger;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.joda.time.Duration;
 
 public class LinstorStoragePool implements KVMStoragePool {
-    private static final Logger s_logger = Logger.getLogger(LinstorStoragePool.class);
+    private static final Logger LOGGER = LogManager.getLogger(LinstorStoragePool.class);
     private final String _uuid;
     private final String _sourceHost;
     private final int _sourcePort;
@@ -226,12 +227,12 @@ public String getHearthBeatPath() {
     @Override
     public String createHeartBeatCommand(HAStoragePool pool, String hostPrivateIp,
             boolean hostValidation) {
-        s_logger.trace(String.format("Linstor.createHeartBeatCommand: %s, %s, %b", pool.getPoolIp(), hostPrivateIp, hostValidation));
+        LOGGER.trace(String.format("Linstor.createHeartBeatCommand: %s, %s, %b", pool.getPoolIp(), hostPrivateIp, hostValidation));
         boolean isStorageNodeUp = checkingHeartBeat(pool, null);
         if (!isStorageNodeUp && !hostValidation) {
             //restart the host
-            s_logger.debug(String.format("The host [%s] will be restarted because the health check failed for the storage pool [%s]", hostPrivateIp, pool.getPool().getType()));
-            Script cmd = new Script(pool.getPool().getHearthBeatPath(), Duration.millis(HeartBeatUpdateTimeout), s_logger);
+            LOGGER.debug(String.format("The host [%s] will be restarted because the health check failed for the storage pool [%s]", hostPrivateIp, pool.getPool().getType()));
+            Script cmd = new Script(pool.getPool().getHearthBeatPath(), Duration.millis(HeartBeatUpdateTimeout), LOGGER);
             cmd.add("-c");
             cmd.execute();
             return "Down";
@@ -247,7 +248,7 @@ public String getStorageNodeId() {
 
     static String getHostname() {
         OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
-        Script sc = new Script("hostname", Duration.millis(10000L), s_logger);
+        Script sc = new Script("hostname", Duration.millis(10000L), LOGGER);
         String res = sc.execute(parser);
         if (res != null) {
             throw new CloudRuntimeException(String.format("Unable to run 'hostname' command: %s", res));
@@ -264,7 +265,7 @@ public Boolean checkingHeartBeat(HAStoragePool pool, HostTO host) {
         } else {
             hostName = host.getParent();
             if (hostName == null) {
-                s_logger.error("No hostname set in host.getParent()");
+                LOGGER.error("No hostname set in host.getParent()");
                 return false;
             }
         }
@@ -273,7 +274,7 @@ public Boolean checkingHeartBeat(HAStoragePool pool, HostTO host) {
     }
 
     private String executeDrbdSetupStatus(OutputInterpreter.AllLinesParser parser) {
-        Script sc = new Script("drbdsetup", Duration.millis(HeartBeatUpdateTimeout), s_logger);
+        Script sc = new Script("drbdsetup", Duration.millis(HeartBeatUpdateTimeout), LOGGER);
         sc.add("status");
         sc.add("--json");
         return sc.execute(parser);
@@ -293,12 +294,12 @@ private boolean checkDrbdSetupStatusOutput(String output, String otherNodeName)
                 }
             }
         }
-        s_logger.warn(String.format("checkDrbdSetupStatusOutput: no resource connected to %s.", otherNodeName));
+        LOGGER.warn(String.format("checkDrbdSetupStatusOutput: no resource connected to %s.", otherNodeName));
         return false;
     }
 
     private String executeDrbdEventsNow(OutputInterpreter.AllLinesParser parser) {
-        Script sc = new Script("drbdsetup", Duration.millis(HeartBeatUpdateTimeout), s_logger);
+        Script sc = new Script("drbdsetup", Duration.millis(HeartBeatUpdateTimeout), LOGGER);
         sc.add("events2");
         sc.add("--now");
         return sc.execute(parser);
@@ -307,13 +308,13 @@ private String executeDrbdEventsNow(OutputInterpreter.AllLinesParser parser) {
     private boolean checkDrbdEventsNowOutput(String output) {
         boolean healthy = output.lines().noneMatch(line -> line.matches(".*role:Primary .* promotion_score:0.*"));
         if (!healthy) {
-            s_logger.warn("checkDrbdEventsNowOutput: primary resource with promotion score==0; HA false");
+            LOGGER.warn("checkDrbdEventsNowOutput: primary resource with promotion score==0; HA false");
         }
         return healthy;
     }
 
     private boolean checkHostUpToDateAndConnected(String hostName) {
-        s_logger.trace(String.format("checkHostUpToDateAndConnected: %s/%s", localNodeName, hostName));
+        LOGGER.trace(String.format("checkHostUpToDateAndConnected: %s/%s", localNodeName, hostName));
         OutputInterpreter.AllLinesParser parser = new OutputInterpreter.AllLinesParser();
 
         if (localNodeName.equalsIgnoreCase(hostName)) {
@@ -331,7 +332,7 @@ private boolean checkHostUpToDateAndConnected(String hostName) {
             try {
                 return checkDrbdSetupStatusOutput(parser.getLines(), hostName);
             } catch (JsonIOException | JsonSyntaxException e) {
-                s_logger.error("Error parsing drbdsetup status --json", e);
+                LOGGER.error("Error parsing drbdsetup status --json", e);
             }
         }
         return false;
@@ -339,7 +340,7 @@ private boolean checkHostUpToDateAndConnected(String hostName) {
 
     @Override
     public Boolean vmActivityCheck(HAStoragePool pool, HostTO host, Duration activityScriptTimeout, String volumeUUIDListString, String vmActivityCheckPath, long duration) {
-        s_logger.trace(String.format("Linstor.vmActivityCheck: %s, %s", pool.getPoolIp(), host.getPrivateNetwork().getIp()));
+        LOGGER.trace(String.format("Linstor.vmActivityCheck: %s, %s", pool.getPoolIp(), host.getPrivateNetwork().getIp()));
         return checkingHeartBeat(pool, host);
     }
 }
diff --git a/server/src/main/java/com/cloud/network/router/VpcVirtualNetworkApplianceManagerImpl.java b/server/src/main/java/com/cloud/network/router/VpcVirtualNetworkApplianceManagerImpl.java
index a46c2fd81ea5..c09df8d86557 100644
--- a/server/src/main/java/com/cloud/network/router/VpcVirtualNetworkApplianceManagerImpl.java
+++ b/server/src/main/java/com/cloud/network/router/VpcVirtualNetworkApplianceManagerImpl.java
@@ -305,9 +305,7 @@ private void appendSourceNatIpToBootArgs(final VirtualMachineProfile profile) {
             List<IPAddressVO> vpcIps = _ipAddressDao.listByAssociatedVpc(router.getVpcId(), true);
             if (CollectionUtils.isNotEmpty(vpcIps)) {
                 buf.append(String.format(" source_nat_ip=%s", vpcIps.get(0).getAddress().toString()));
-                if (s_logger.isDebugEnabled()) {
-                    s_logger.debug("The final Boot Args for " + profile + ": " + buf);
-                }
+                logger.debug("The final Boot Args for " + profile + ": " + buf);
             }
         }
     }