diff --git a/src/main/java/com/eactive/eai/common/inflow/InflowControlManager.java b/src/main/java/com/eactive/eai/common/inflow/InflowControlManager.java
index b44d5ac..1992993 100644
--- a/src/main/java/com/eactive/eai/common/inflow/InflowControlManager.java
+++ b/src/main/java/com/eactive/eai/common/inflow/InflowControlManager.java
@@ -7,6 +7,7 @@ import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -39,11 +40,11 @@ public class InflowControlManager implements Lifecycle, Bucket {
 	public static final String QUOTA_TIMEUNIT_DAY = "DAY";
 	public static final String QUOTA_TIMEUNIT_MONTH = "MON";
 
-	private Map<String, CustomBucket> adapterBucketList = new HashMap<>();
-	private Map<String, CustomBucket> interfaceBucketList = new HashMap<>();
-	private Map<String, CustomGroupBucket> groupBucketList = new HashMap<>();
-	private Map<String, String> interfaceToGroupMap = new HashMap<>();
-	private Map<String, InflowGroupVO> groupVoMap = new HashMap<>();
+	private volatile Map<String, CustomBucket> adapterBucketList = new ConcurrentHashMap<>();
+	private volatile Map<String, CustomBucket> interfaceBucketList = new ConcurrentHashMap<>();
+	private volatile Map<String, CustomGroupBucket> groupBucketList = new ConcurrentHashMap<>();
+	private volatile Map<String, String> interfaceToGroupMap = new ConcurrentHashMap<>();
+	private volatile Map<String, InflowGroupVO> groupVoMap = new ConcurrentHashMap<>();
 	private boolean started;
 	private LifecycleSupport lifecycle = new LifecycleSupport(this);
 
@@ -97,37 +98,39 @@ public class InflowControlManager implements Lifecycle, Bucket {
 	}
 
 	private void initAdapter() throws Exception {
-		adapterBucketList = new HashMap<>();
+		Map<String, CustomBucket> newMap = new HashMap<>();
 		List<InflowTargetVO> inflowAdapterVoList = inflowControlDAO.getInflowAdapterList();
 
 		for (InflowTargetVO inflowVo : inflowAdapterVoList) {
 			if (InflowControlManager.isInflowTarget(inflowVo)) {
 				CustomBucket bucket = makeBucketUsingInflowVO(inflowVo);
 				if (bucket != null) {
-					adapterBucketList.put(inflowVo.getName(), bucket);
+					newMap.put(inflowVo.getName(), bucket);
 				}
 			}
 		}
+		this.adapterBucketList = newMap;
 	}
 
 	private void initInterface() throws Exception {
-		interfaceBucketList = new HashMap<>();
+		Map<String, CustomBucket> newMap = new HashMap<>();
 		List<InflowTargetVO> inflowInterfaceVoList = inflowControlDAO.getInflowInterfaceList();
 
 		for (InflowTargetVO inflowVo : inflowInterfaceVoList) {
 			if (InflowControlManager.isInflowTarget(inflowVo)) {
 				CustomBucket bucket = makeBucketUsingInflowVO(inflowVo);
 				if (bucket != null) {
-					interfaceBucketList.put(inflowVo.getName(), bucket);
+					newMap.put(inflowVo.getName(), bucket);
 				}
 			}
 		}
+		this.interfaceBucketList = newMap;
 	}
 
 	private void initGroup() throws Exception {
-		groupBucketList = new HashMap<>();
-		interfaceToGroupMap = new HashMap<>();
-		groupVoMap = new HashMap<>();
+		Map<String, CustomGroupBucket> newGroupBucketList = new HashMap<>();
+		Map<String, String> newInterfaceToGroupMap = new HashMap<>();
+		Map<String, InflowGroupVO> newGroupVoMap = new HashMap<>();
 
 		List<InflowGroupVO> inflowGroupVoList = inflowControlDAO.getInflowGroupList();
 
@@ -135,20 +138,24 @@ public class InflowControlManager implements Lifecycle, Bucket {
 			if (isInflowGroupTarget(groupVo)) {
 				CustomGroupBucket bucket = makeGroupBucket(groupVo);
 				if (bucket != null) {
-					groupBucketList.put(groupVo.getGroupId(), bucket);
-					groupVoMap.put(groupVo.getGroupId(), groupVo);
+					newGroupBucketList.put(groupVo.getGroupId(), bucket);
+					newGroupVoMap.put(groupVo.getGroupId(), groupVo);
 					// 인터페이스 → 그룹 매핑 등록
 					for (String interfaceId : groupVo.getInterfaceList()) {
-						interfaceToGroupMap.put(interfaceId, groupVo.getGroupId());
+						newInterfaceToGroupMap.put(interfaceId, groupVo.getGroupId());
 					}
 				}
 			}
 		}
 
 		if (logger.isInfo()) {
-			logger.info("InflowControlManager] initGroup completed. groups=" + groupBucketList.size()
-					+ ", mappings=" + interfaceToGroupMap.size());
+			logger.info("InflowControlManager] initGroup completed. groups=" + newGroupBucketList.size()
+					+ ", mappings=" + newInterfaceToGroupMap.size());
 		}
+
+		this.groupBucketList = newGroupBucketList;
+		this.interfaceToGroupMap = newInterfaceToGroupMap;
+		this.groupVoMap = newGroupVoMap;
 	}
 
 	public synchronized void reloadAdapter() throws Exception {
@@ -293,11 +300,11 @@ public class InflowControlManager implements Lifecycle, Bucket {
 		// Notify our interested LifecycleListeners
 		lifecycle.fireLifecycleEvent(STOPING_EVENT, this);
 
-		adapterBucketList.clear();
-		interfaceBucketList.clear();
-		groupBucketList.clear();
-		interfaceToGroupMap.clear();
-		groupVoMap.clear();
+		adapterBucketList = new ConcurrentHashMap<>();
+		interfaceBucketList = new ConcurrentHashMap<>();
+		groupBucketList = new ConcurrentHashMap<>();
+		interfaceToGroupMap = new ConcurrentHashMap<>();
+		groupVoMap = new ConcurrentHashMap<>();
 
 		started = false;
 		// Notify our interested LifecycleListeners
@@ -340,15 +347,15 @@ public class InflowControlManager implements Lifecycle, Bucket {
 		return svcCd;
 	}
 
-	public void removeAdapter(String adapter) {
+	public synchronized void removeAdapter(String adapter) {
 		adapterBucketList.remove(adapter);
 	}
 
-	public void removeInterface(String inter) {
+	public synchronized void removeInterface(String inter) {
 		interfaceBucketList.remove(inter);
 	}
 
-	public void removeGroup(String groupId) {
+	public synchronized void removeGroup(String groupId) {
 		groupBucketList.remove(groupId);
 		groupVoMap.remove(groupId);
 		// 해당 그룹에 속한 인터페이스 매핑도 제거