diff --git a/build_client.sh b/build_client.sh
index 124e18d77..981e43edd 100755
--- a/build_client.sh
+++ b/build_client.sh
@@ -4,9 +4,9 @@
 # download maven from :
 #   https://maven.apache.org
 
-if [ ! -z "${JAVA_11_HOME}" ]; then
-	echo JAVA_11_HOME: ${JAVA_11_HOME}
-	JAVA_HOME=${JAVA_11_HOME}
+if [ ! -z "${JAVA_21_HOME}" ]; then
+	echo JAVA_21_HOME: ${JAVA_21_HOME}
+	JAVA_HOME=${JAVA_21_HOME}
 fi
 
 MVN="`which mvn`"
diff --git a/pom.xml b/pom.xml
index 0bc5d6cea..cb09772fb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 
     <groupId>io.github.scouter-project</groupId>
     <artifactId>scouter-parent</artifactId>
-    <version>2.20.0</version> <!--scouter-->
+    <version>2.21.1</version> <!--scouter-->
     <packaging>pom</packaging>
 
     <name>SCOUTER APM</name>
diff --git a/scouter.agent.batch/pom.xml b/scouter.agent.batch/pom.xml
index 3482a28e6..b4a9fffab 100644
--- a/scouter.agent.batch/pom.xml
+++ b/scouter.agent.batch/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
 
     <artifactId>scouter-agent-batch</artifactId>
diff --git a/scouter.agent.host/pom.xml b/scouter.agent.host/pom.xml
index 7241b53b3..0e80321fc 100644
--- a/scouter.agent.host/pom.xml
+++ b/scouter.agent.host/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
 
     <artifactId>scouter-agent-host</artifactId>
diff --git a/scouter.agent.java/pom.xml b/scouter.agent.java/pom.xml
index 37cfc9c41..9d8f14455 100644
--- a/scouter.agent.java/pom.xml
+++ b/scouter.agent.java/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
 
     <artifactId>scouter-agent-java</artifactId>
diff --git a/scouter.client.build/pom.xml b/scouter.client.build/pom.xml
index 90b1006d9..829b8d0f3 100644
--- a/scouter.client.build/pom.xml
+++ b/scouter.client.build/pom.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" 
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>scouter.client</groupId>
@@ -13,15 +13,15 @@
 		<module>../scouter.client.product</module>
 	</modules>
 	<properties>
-		<tycho-version>2.7.0</tycho-version>
+		<tycho-version>5.0.1</tycho-version>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 	</properties>
 	<repositories>
-	        <repository>
-	        	<id>eclipse-simultaneous-2022-03</id>
-	        	<layout>p2</layout>
-        		<url>https://download.eclipse.org/releases/2022-03/</url>
-	        </repository>
+		<repository>
+			<id>eclipse-2025-12</id>
+			<layout>p2</layout>
+			<url>https://download.eclipse.org/releases/2025-12/</url>
+		</repository>
 	</repositories>
 
 	<build>
diff --git a/scouter.client.feature/feature.xml b/scouter.client.feature/feature.xml
index 366100806..d32e4e82d 100644
--- a/scouter.client.feature/feature.xml
+++ b/scouter.client.feature/feature.xml
@@ -20,13 +20,6 @@
       [Enter License Description here.]
    </license>
 
-   <plugin
-         id="javax.servlet"
-         download-size="0"
-         install-size="0"
-         version="0.0.0"
-         unpack="false"/>
-
    <plugin
          id="org.eclipse.compare.core"
          download-size="0"
diff --git a/scouter.client.product/scouter.client.product b/scouter.client.product/scouter.client.product
index ab1e03d52..a5f4eabde 100644
--- a/scouter.client.product/scouter.client.product
+++ b/scouter.client.product/scouter.client.product
@@ -26,7 +26,7 @@
       <vmArgs>-Xms128m
 -Xmx1024m
 -XX:+UseG1GC
--Dosgi.requiredJavaVersion=11
+-Dosgi.requiredJavaVersion=21
       </vmArgs>
       <vmArgsMac>-XstartOnFirstThread -Dorg.eclipse.swt.internal.carbon.smallFonts
       </vmArgsMac>
@@ -52,10 +52,16 @@
    </vm>
 
    <plugins>
+      <plugin id="org.eclipse.equinox.launcher"/>
+      <plugin id="org.eclipse.equinox.launcher.cocoa.macosx.x86_64" fragment="true"/>
+      <plugin id="org.eclipse.equinox.launcher.cocoa.macosx.aarch64" fragment="true"/>
+      <plugin id="org.eclipse.equinox.launcher.gtk.linux.x86_64" fragment="true"/>
+      <plugin id="org.eclipse.equinox.launcher.win32.win32.x86_64" fragment="true"/>
    </plugins>
 
    <features>
-      <feature id="org.eclipse.rcp"/>
+      <feature id="org.eclipse.platform"/>
+      <feature id="org.eclipse.equinox.executable"/>
       <feature id="scouter.client.feature"/>
       <feature id="org.eclipse.emf.ecore"/>
       <feature id="org.eclipse.emf.common"/>
diff --git a/scouter.client/META-INF/MANIFEST.MF b/scouter.client/META-INF/MANIFEST.MF
index e4f754910..5eb892093 100644
--- a/scouter.client/META-INF/MANIFEST.MF
+++ b/scouter.client/META-INF/MANIFEST.MF
@@ -25,7 +25,7 @@ Require-Bundle:
  org.eclipse.swt,
  org.eclipse.e4.core.commands,
  org.eclipse.e4.ui.services
-Bundle-RequiredExecutionEnvironment: JavaSE-11
+Bundle-RequiredExecutionEnvironment: JavaSE-17
 Bundle-ActivationPolicy: lazy
 Bundle-ClassPath: .,
  lib/scouter.common.jar,
diff --git a/scouter.client/pom.xml b/scouter.client/pom.xml
index d099e3977..5627e719d 100644
--- a/scouter.client/pom.xml
+++ b/scouter.client/pom.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" 
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" >
   <modelVersion>4.0.0</modelVersion>
 
@@ -20,8 +20,8 @@
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-compiler-plugin</artifactId>
             <configuration>
-                <source>11</source>
-                <target>11</target>
+                <source>21</source>
+                <target>21</target>
             </configuration>
         </plugin>
     </plugins>
diff --git a/scouter.client/src/scouter/client/popup/ManageGroupDialog.java b/scouter.client/src/scouter/client/popup/ManageGroupDialog.java
index e631e858e..4b2df6a30 100644
--- a/scouter.client/src/scouter/client/popup/ManageGroupDialog.java
+++ b/scouter.client/src/scouter/client/popup/ManageGroupDialog.java
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2015 the original author or authors. 
+ *  Copyright 2015 the original author or authors. 
  *  @https://github.com/scouter-project/scouter
  *
  *  Licensed under the Apache License, Version 2.0 (the "License"); 
@@ -40,6 +40,7 @@
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableItem;
+import org.eclipse.swt.widgets.Text;
 
 import scouter.client.Images;
 import scouter.client.group.GroupManager;
@@ -57,6 +58,7 @@ public class ManageGroupDialog {
 
 	Set<Integer> noSelectedSet = new HashSet<Integer>();
 	Set<Integer> selectedSet = new HashSet<Integer>();
+	Set<Integer> currentAllSet = new HashSet<Integer>();
 
 	public ManageGroupDialog(Display display, String groupName, String objType,
 			IManageGroup callback) {
@@ -78,33 +80,46 @@ public void show() {
 		title.setFont(new Font(null, "Arial", 10, SWT.BOLD));
 		title.setImage(Images.getObjectIcon(objType, true, 0));
 		title.setText(groupName + "(" +  getDisplayObjtype(objType) + ")");
-		
+
+		Composite searchComp = new Composite(dialog, SWT.NONE);
+		searchComp.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
+		searchComp.setLayout(new GridLayout(2, false));
+
+		CLabel searchLabel = new CLabel(searchComp, SWT.NONE);
+		searchLabel.setText("Search:");
+		final Text searchText = new Text(searchComp, SWT.BORDER);
+		searchText.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
+		searchText.setMessage("Enter keyword to filter...");
+
+		new CLabel(dialog, SWT.NONE);
+		new CLabel(dialog, SWT.NONE);
+
 		final Table allObjects = new Table(dialog, SWT.BORDER | SWT.MULTI);
 		gr = new GridData(SWT.FILL, SWT.FILL, true, true);
-		gr.widthHint = 250;
-		gr.heightHint = 300;
+		gr.widthHint = 375;
+		gr.heightHint = 450;
 		allObjects.setLayoutData(gr);
-		
+
 		Composite centerComp = new Composite(dialog, SWT.NONE);
 		gr = new GridData(SWT.FILL, SWT.FILL, true, true);
-		gr.widthHint = 100;
+		gr.widthHint = 150;
 		centerComp.setLayoutData(gr);
 		centerComp.setLayout(new GridLayout(1, true));
-		
+
 		Button addBtn = new Button(centerComp, SWT.PUSH);
 		addBtn.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, true));
 		addBtn.setImage(Images.arrow_right);
 		addBtn.setText("Add");
-		
+
 		Button removeBtn = new Button(centerComp, SWT.PUSH);
 		removeBtn.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, true));
 		removeBtn.setImage(Images.arrow_left);
 		removeBtn.setText("Remove");
-		
+
 		final Table selectedObjects = new Table(dialog, SWT.BORDER | SWT.MULTI);
 		gr = new GridData(SWT.FILL, SWT.FILL, true, true);
-		gr.widthHint = 250;
-		gr.heightHint = 300;
+		gr.widthHint = 375;
+		gr.heightHint = 450;
 		selectedObjects.setLayoutData(gr);
 		
 		addBtn.addListener(SWT.Selection, new Listener(){
@@ -115,14 +130,16 @@ public void handleEvent(Event event) {
 				}
 				for (int i = 0; i < items.length; i++) {
 					TableItem item = items[i];
+					int objHash = (Integer) item.getData();
+					currentAllSet.remove(objHash);
 					TableItem newItem = new TableItem(selectedObjects, SWT.NONE);
 					newItem.setData(item.getData());
 					newItem.setText(item.getText());
 					newItem.setImage(item.getImage());
-					allObjects.remove(allObjects.indexOf(item));
 					item.dispose();
 				}
-				sortTable(allObjects);
+				String filter = searchText.getText();
+				refreshTable(allObjects, currentAllSet, filter);
 				sortTable(selectedObjects);
 			}
 		});
@@ -135,15 +152,12 @@ public void handleEvent(Event event) {
 				}
 				for (int i = 0; i < items.length; i++) {
 					TableItem item = items[i];
-					TableItem newItem = new TableItem(allObjects, SWT.NONE);
-					newItem.setData(item.getData());
-					newItem.setText(item.getText());
-					newItem.setImage(item.getImage());
-					selectedObjects.remove(selectedObjects.indexOf(item));
+					int objHash = (Integer) item.getData();
+					currentAllSet.add(objHash);
 					item.dispose();
 				}
-				sortTable(allObjects);
-				sortTable(selectedObjects);
+				String filter = searchText.getText();
+				refreshTable(allObjects, currentAllSet, filter);
 			}
 		});
 		
@@ -175,10 +189,8 @@ public void handleEvent(Event event) {
 						addedObjHashs.add(objHash);
 					}
 				}
-				TableItem[] noSelectedItems = allObjects.getItems();
 				List<Integer> removedObjHashs = new ArrayList<Integer>();
-				for (TableItem item : noSelectedItems) {
-					int objHash = (Integer) item.getData();
+				for (Integer objHash : currentAllSet) {
 					if (noSelectedSet.contains(objHash) == false) {
 						removedObjHashs.add(objHash);
 					}
@@ -200,22 +212,14 @@ public void handleEvent(Event event) {
 						selectedSet.add(objHash);
 					} else {
 						noSelectedSet.add(objHash);
+						currentAllSet.add(objHash);
 					}
 				}
 			}
 		}
-		
-		for (Integer objHash : noSelectedSet) {
-			AgentObject agent = AgentModelThread.getInstance().getAgentObject(objHash);
-			if (agent == null) {
-				continue;
-			}
-			TableItem item = new TableItem(allObjects, SWT.NONE);
-			item.setData(objHash);
-			item.setText(agent.getObjName() + "(" + ServerManager.getInstance().getServer(agent.getServerId()).getName() + ")");
-			item.setImage(agent.isAlive() ? Images.active : Images.dead);
-		}
-		
+
+		refreshTable(allObjects, currentAllSet, null);
+
 		for (Integer objHash : selectedSet) {
 			AgentObject agent = AgentModelThread.getInstance().getAgentObject(objHash);
 			if (agent == null) {
@@ -226,9 +230,14 @@ public void handleEvent(Event event) {
 			item.setText(agent.getObjName() + "(" + ServerManager.getInstance().getServer(agent.getServerId()).getName() + ")");
 			item.setImage(agent.isAlive() ? Images.active : Images.dead);
 		}
-		
-		sortTable(allObjects);
 		sortTable(selectedObjects);
+
+		searchText.addListener(SWT.Modify, new Listener(){
+			public void handleEvent(Event event) {
+				String filter = searchText.getText();
+				refreshTable(allObjects, currentAllSet, filter);
+			}
+		});
 		
 		dialog.pack();
 		dialog.open();
@@ -256,6 +265,24 @@ public int[] toIntArray(List<Integer> list) {
 		return ret;
 	}
 
+	private void refreshTable(Table table, Set<Integer> objHashSet, String filter) {
+		table.removeAll();
+		for (Integer objHash : objHashSet) {
+			AgentObject agent = AgentModelThread.getInstance().getAgentObject(objHash);
+			if (agent == null) {
+				continue;
+			}
+			String displayText = agent.getObjName() + "(" + ServerManager.getInstance().getServer(agent.getServerId()).getName() + ")";
+			if (filter == null || filter.isEmpty() || displayText.toLowerCase().contains(filter.toLowerCase())) {
+				TableItem item = new TableItem(table, SWT.NONE);
+				item.setData(objHash);
+				item.setText(displayText);
+				item.setImage(agent.isAlive() ? Images.active : Images.dead);
+			}
+		}
+		sortTable(table);
+	}
+
 	private void sortTable(Table table) {
 		TableItem[] items = table.getItems();
 		Collator collator = Collator.getInstance(Locale.getDefault());
diff --git a/scouter.common/pom.xml b/scouter.common/pom.xml
index 117dd4012..3095c8b6e 100644
--- a/scouter.common/pom.xml
+++ b/scouter.common/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
 
     <artifactId>scouter-common</artifactId>
diff --git a/scouter.deploy/pom.xml b/scouter.deploy/pom.xml
index 2e3b3a307..af080a083 100644
--- a/scouter.deploy/pom.xml
+++ b/scouter.deploy/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
 
     <artifactId>scouter-deploy</artifactId>
diff --git a/scouter.extra.java20/pom.xml b/scouter.extra.java20/pom.xml
index 2085893ca..ed326c6aa 100644
--- a/scouter.extra.java20/pom.xml
+++ b/scouter.extra.java20/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/scouter.server.boot/pom.xml b/scouter.server.boot/pom.xml
index 8aae8184c..5462f8662 100644
--- a/scouter.server.boot/pom.xml
+++ b/scouter.server.boot/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
 
     <artifactId>scouter-server-boot</artifactId>
diff --git a/scouter.server/pom.xml b/scouter.server/pom.xml
index 7d5865b65..2721b5aef 100644
--- a/scouter.server/pom.xml
+++ b/scouter.server/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
 
     <artifactId>scouter-server</artifactId>
diff --git a/scouter.weaver/pom.xml b/scouter.weaver/pom.xml
index 76799cc3f..3bb36b9c0 100644
--- a/scouter.weaver/pom.xml
+++ b/scouter.weaver/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/scouter.webapp/pom.xml b/scouter.webapp/pom.xml
index e4474e9ec..39c9000e5 100644
--- a/scouter.webapp/pom.xml
+++ b/scouter.webapp/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>io.github.scouter-project</groupId>
         <artifactId>scouter-parent</artifactId>
-        <version>2.20.0</version> <!--scouter-->
+        <version>2.21.1</version> <!--scouter-->
     </parent>
     <modelVersion>4.0.0</modelVersion>