diff --git a/dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/cache/AlertPluginDefineCache.java b/dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/cache/AlertPluginDefineCache.java
deleted file mode 100644
index 5648ef2ad2..0000000000
--- a/dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/cache/AlertPluginDefineCache.java
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.dolphinscheduler.alert.cache;
-
-import java.util.HashMap;
-import java.util.Map;
-
-public class AlertPluginDefineCache {
-
-    public AlertPluginDefineCache() {
-        throw new IllegalStateException("Utility class");
-    }
-
-    /**
-     * k->pluginDefineId v->pluginDefineName
-     */
-    private static Map<Integer, String> pluginDefineMap = new HashMap<>();
-
-    public static void addPlugin(int id, String name) {
-        pluginDefineMap.put(id, name);
-    }
-
-    public static String getNameById(int id) {
-        return pluginDefineMap.get(id);
-    }
-}
diff --git a/dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/plugin/AlertPluginManager.java b/dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/plugin/AlertPluginManager.java
index 498fd757e9..d795e71d52 100644
--- a/dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/plugin/AlertPluginManager.java
+++ b/dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/plugin/AlertPluginManager.java
@@ -22,7 +22,6 @@ import static java.util.Objects.requireNonNull;
 
 import static com.google.common.base.Preconditions.checkState;
 
-import org.apache.dolphinscheduler.alert.cache.AlertPluginDefineCache;
 import org.apache.dolphinscheduler.common.enums.PluginType;
 import org.apache.dolphinscheduler.dao.entity.PluginDefine;
 import org.apache.dolphinscheduler.spi.DolphinSchedulerPlugin;
@@ -32,6 +31,7 @@ import org.apache.dolphinscheduler.spi.classloader.ThreadContextClassLoader;
 import org.apache.dolphinscheduler.spi.params.PluginParamsTransfer;
 import org.apache.dolphinscheduler.spi.params.base.PluginParams;
 
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
@@ -48,6 +48,11 @@ public class AlertPluginManager extends AbstractDolphinPluginManager {
     private final Map<String, AlertChannelFactory> alertChannelFactoryMap = new ConcurrentHashMap<>();
     private final Map<String, AlertChannel> alertChannelMap = new ConcurrentHashMap<>();
 
+    /**
+     * k->pluginDefineId v->pluginDefineName
+     */
+    private final Map<Integer, String> pluginDefineMap = new HashMap<>();
+
     public void addAlertChannelFactory(AlertChannelFactory alertChannelFactory) {
         requireNonNull(alertChannelFactory, "alertChannelFactory is null");
 
@@ -84,6 +89,10 @@ public class AlertPluginManager extends AbstractDolphinPluginManager {
         return alertChannelMap;
     }
 
+    public String getPluginNameById(int id) {
+        return pluginDefineMap.get(id);
+    }
+
     @Override
     public void installPlugin(DolphinSchedulerPlugin dolphinSchedulerPlugin) {
         for (AlertChannelFactory alertChannelFactory : dolphinSchedulerPlugin.getAlertChannelFactorys()) {
@@ -95,7 +104,7 @@ public class AlertPluginManager extends AbstractDolphinPluginManager {
 
             PluginDefine pluginDefine = new PluginDefine(nameEn, PluginType.ALERT.getDesc(), paramsJson);
             int id = pluginDao.addOrUpdatePluginDefine(pluginDefine);
-            AlertPluginDefineCache.addPlugin(id, pluginDefine.getPluginName());
+            pluginDefineMap.put(id, pluginDefine.getPluginName());
         }
     }
 }
diff --git a/dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/runner/AlertSender.java b/dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/runner/AlertSender.java
index 0fc8dd07e1..44a1047613 100644
--- a/dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/runner/AlertSender.java
+++ b/dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/runner/AlertSender.java
@@ -17,7 +17,6 @@
 
 package org.apache.dolphinscheduler.alert.runner;
 
-import org.apache.dolphinscheduler.alert.cache.AlertPluginDefineCache;
 import org.apache.dolphinscheduler.alert.plugin.AlertPluginManager;
 import org.apache.dolphinscheduler.common.enums.AlertStatus;
 import org.apache.dolphinscheduler.common.utils.CollectionUtils;
@@ -146,7 +145,7 @@ public class AlertSender {
      * @return AlertResult
      */
     private AlertResult alertResultHandler(AlertPluginInstance instance, AlertData alertData) {
-        String pluginName = AlertPluginDefineCache.getNameById(instance.getPluginDefineId());
+        String pluginName = alertPluginManager.getPluginNameById(instance.getPluginDefineId());
         AlertChannel alertChannel = alertPluginManager.getAlertChannelMap().get(pluginName);
         AlertResult alertResultExtend = new AlertResult();
         String pluginInstanceName = instance.getInstanceName();
diff --git a/dolphinscheduler-alert/src/test/java/org/apache/dolphinscheduler/alert/AlertServerTest.java b/dolphinscheduler-alert/src/test/java/org/apache/dolphinscheduler/alert/AlertServerTest.java
index a8ead79be9..7293b485d6 100644
--- a/dolphinscheduler-alert/src/test/java/org/apache/dolphinscheduler/alert/AlertServerTest.java
+++ b/dolphinscheduler-alert/src/test/java/org/apache/dolphinscheduler/alert/AlertServerTest.java
@@ -34,6 +34,7 @@ import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.Mockito;
 import org.powermock.api.mockito.PowerMockito;
 import org.powermock.core.classloader.annotations.PrepareForTest;
 import org.powermock.modules.junit4.PowerMockRunner;
@@ -62,6 +63,7 @@ public class AlertServerTest {
         PowerMockito.whenNew(AlertPluginManager.class).withNoArguments().thenReturn(alertPluginManager);
         ConcurrentHashMap alertChannelMap = new ConcurrentHashMap<>();
         alertChannelMap.put("pluginName",alertChannelMock);
+        PowerMockito.when(alertPluginManager.getPluginNameById(Mockito.anyInt())).thenReturn("pluginName");
         PowerMockito.when(alertPluginManager.getAlertChannelMap()).thenReturn(alertChannelMap);
 
         DolphinPluginManagerConfig alertPluginManagerConfig = PowerMockito.mock(DolphinPluginManagerConfig.class);