diff --git a/src/locales/en.json b/src/locales/en.json
index 1a17a35..16ed9b2 100644
--- a/src/locales/en.json
+++ b/src/locales/en.json
@@ -619,5 +619,7 @@
   "Break Off": "Break Off",
   "Please enter a legal domain": "Please enter a legal domain",
   "External Access Domain": "External Access Domain",
+  "Failed to load task logs": "Failed to load task logs",
+  "Retry loading logs": "Retry loading logs",
   "WorkLoad": "WorkLoad"
 }
diff --git a/src/locales/zh.json b/src/locales/zh.json
index 0ba1519..452663a 100644
--- a/src/locales/zh.json
+++ b/src/locales/zh.json
@@ -619,5 +619,7 @@
   "Break Off": "中断",
   "Please enter a legal domain": "请输入合法的域名",
   "External Access Domain": "外部访问域名",
+  "Failed to load task logs": "任务日志加载失败",
+  "Retry loading logs": "重新加载日志",
   "WorkLoad": "工作负载"
 }
diff --git a/src/pages/cluster/containers/Cluster/Detail/Operation/actions/PipelineLogDialog/RightLogContent.jsx b/src/pages/cluster/containers/Cluster/Detail/Operation/actions/PipelineLogDialog/RightLogContent.jsx
index a21d82b..35abb3a 100644
--- a/src/pages/cluster/containers/Cluster/Detail/Operation/actions/PipelineLogDialog/RightLogContent.jsx
+++ b/src/pages/cluster/containers/Cluster/Detail/Operation/actions/PipelineLogDialog/RightLogContent.jsx
@@ -22,7 +22,7 @@ import {
   CheckCircleFilled,
   CloseCircleFilled,
 } from '@ant-design/icons';
-import { Spin } from 'antd';
+import { Alert, Button, Spin } from 'antd';
 import { observer } from 'mobx-react';
 import styles from './index.less';
 import { useRootStore } from 'stores';
@@ -31,12 +31,29 @@ import { formatSeconds } from 'utils';
 import { useInterval } from 'hooks';
 
 function LogItemContent(props) {
-  const { isExpand, isLoading, logdata } = props;
+  const { isExpand, isLoading, logdata, logError, onRetry } = props;
   if (isExpand) {
     if (isLoading) {
       return <Spin className={styles['spin-center']} />;
     } else {
-      return <pre className={styles['log-item-content']}>{logdata}</pre>;
+      return (
+        <div className={styles['log-item-content']}>
+          {logdata && <pre>{logdata}</pre>}
+          {logError && (
+            <Alert
+              type="error"
+              showIcon
+              message={t('Failed to load task logs')}
+              description={logError}
+              action={
+                <Button size="small" onClick={onRetry}>
+                  {t('Retry loading logs')}
+                </Button>
+              }
+            />
+          )}
+        </div>
+      );
     }
   }
   return '';
@@ -50,8 +67,14 @@ const LogItem = observer((props) => {
     nodeStatus
   );
   logStore.isStepFinished = taskFinished;
-  const { logdata, isExpand, isLoading, cumulativeSize, isStepFinished } =
-    logStore;
+  const {
+    logdata,
+    logError,
+    isExpand,
+    isLoading,
+    cumulativeSize,
+    isStepFinished,
+  } = logStore;
 
   const stateIcons = (errIgnore, status) => {
     if (status === 'Succeeded') {
@@ -93,11 +116,12 @@ const LogItem = observer((props) => {
     if (!taskName) return;
 
     if (!isExpand) {
-      logStore.getStepLog(params);
+      logStore.isExpand = true;
+      await logStore.getStepLog(params);
     } else {
       logStore.logReset();
+      logStore.isExpand = false;
     }
-    logStore.isExpand = !isExpand;
   };
 
   return (
@@ -113,6 +137,8 @@ const LogItem = observer((props) => {
       <LogItemContent
         isExpand={isExpand}
         logdata={logdata}
+        logError={logError}
+        onRetry={() => logStore.getStepLog(params)}
         isLoading={isLoading}
       />
     </div>
diff --git a/src/stores/log.js b/src/stores/log.js
index eaf2187..6275868 100644
--- a/src/stores/log.js
+++ b/src/stores/log.js
@@ -21,6 +21,8 @@ import { APIVERSION } from 'utils/constants';
 export default class LogStore extends BaseStore {
   logdata = '';
 
+  logError = '';
+
   isExpand = false;
 
   cumulativeSize = 0;
@@ -33,6 +35,7 @@ export default class LogStore extends BaseStore {
     makeObservable(this, {
       isExpand: observable,
       logdata: observable,
+      logError: observable,
     });
   }
 
@@ -42,36 +45,43 @@ export default class LogStore extends BaseStore {
       return;
     }
 
-    const res = await request.get(
-      `${APIVERSION.operations}/operationtasks/${encodeURIComponent(
-        params.taskName
-      )}/logs`,
-      { offset: params.offset || 0 }
-    );
-    const deliverySize = res.deliverySize || 0;
-    this.cumulativeSize += deliverySize;
-    this.logdata += res.content || '';
+    this.logError = '';
+    try {
+      const res = await request.get(
+        `${APIVERSION.operations}/operationtasks/${encodeURIComponent(
+          params.taskName
+        )}/logs`,
+        { offset: params.offset || 0 }
+      );
+      const deliverySize = res.deliverySize || 0;
+      this.cumulativeSize += deliverySize;
+      this.logdata += res.content || '';
 
-    if (
-      this.isStepFinished &&
-      deliverySize > 0 &&
-      this.cumulativeSize < res.logSize
-    ) {
-      params = { ...params, offset: this.cumulativeSize };
-      await this.fetchStepLog(params);
+      if (
+        this.isStepFinished &&
+        deliverySize > 0 &&
+        this.cumulativeSize < res.logSize
+      ) {
+        params = { ...params, offset: this.cumulativeSize };
+        await this.fetchStepLog(params);
+      }
+    } catch (error) {
+      this.logError =
+        error?.reason || error?.message || t('Failed to load task logs');
+    } finally {
+      this.isExpand = true;
+      this.isLoading = false;
     }
-    this.isExpand = true;
-    this.isLoading = false;
   }
 
   async getStepLog(params) {
     this.isLoading = true;
     await this.fetchStepLog(params);
-    this.isLoading = false;
   }
 
   logReset() {
     this.cumulativeSize = 0;
     this.logdata = '';
+    this.logError = '';
   }
 }
diff --git a/src/stores/log.test.js b/src/stores/log.test.js
new file mode 100644
index 0000000..5317f91
--- /dev/null
+++ b/src/stores/log.test.js
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2021 KubeClipper Authors.
+ *
+ *  Licensed 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.
+ */
+
+import LogStore from './log';
+
+jest.mock('utils/object.mapper', () => ({}));
+
+beforeEach(() => {
+  global.request = { get: jest.fn() };
+});
+
+afterEach(() => {
+  delete global.request;
+});
+
+it('ends loading and exposes an error when the initial log request fails', async () => {
+  const store = new LogStore();
+  request.get.mockRejectedValue({
+    reason: 'agent Task log endpoint is unavailable',
+  });
+
+  await store.fetchStepLog({ taskName: 'task-1' });
+
+  expect(store.isLoading).toBe(false);
+  expect(store.isExpand).toBe(true);
+  expect(store.logError).toBe('agent Task log endpoint is unavailable');
+  expect(store.logdata).toBe('');
+  expect(store.cumulativeSize).toBe(0);
+});
+
+it('retries from the last received offset without losing or duplicating logs', async () => {
+  const store = new LogStore();
+  store.isStepFinished = true;
+  request.get
+    .mockResolvedValueOnce({ content: 'first', deliverySize: 5, logSize: 11 })
+    .mockRejectedValueOnce(new Error('connection lost'));
+
+  await store.getStepLog({ taskName: 'task-1' });
+  expect(store.isLoading).toBe(false);
+  expect(store.logError).toBe('connection lost');
+  expect(store.logdata).toBe('first');
+  expect(store.cumulativeSize).toBe(5);
+
+  request.get.mockResolvedValueOnce({
+    content: 'second',
+    deliverySize: 6,
+    logSize: 11,
+  });
+  await store.getStepLog({ taskName: 'task-1', offset: store.cumulativeSize });
+
+  expect(request.get).toHaveBeenLastCalledWith(
+    'api/operations.kubeclipper.io/v1alpha1/operationtasks/task-1/logs',
+    { offset: 5 }
+  );
+  expect(store.logError).toBe('');
+  expect(store.isLoading).toBe(false);
+  expect(store.logdata).toBe('firstsecond');
+  expect(store.cumulativeSize).toBe(11);
+});
+
+it('ends loading and allows retry when expanding a failed log request', async () => {
+  const store = new LogStore();
+  request.get.mockRejectedValue(new Error('request failed'));
+
+  await store.getStepLog({ taskName: 'task-1' });
+
+  expect(store.isLoading).toBe(false);
+  expect(store.logError).toBe('request failed');
+});