diff --git a/DEV_LOG.md b/DEV_LOG.md
index f7a2cc03..44712ecc 100644
--- a/DEV_LOG.md
+++ b/DEV_LOG.md
@@ -1,4 +1,7 @@
 ## 开发日志
+  + v_3.8.7
+    - 修复组合任务单个子任务失败后，重新恢复组合任务，组合任务状态变为完成的问题
+
   + v_3.8.6 (2020/2/17)
     - fix bug https://github.com/AriaLyy/Aria/issues/608
     - fix bug https://github.com/AriaLyy/Aria/issues/579#issuecomment-586665035
diff --git a/PublicComponent/src/main/java/com/arialyy/aria/core/common/RecordHandler.java b/PublicComponent/src/main/java/com/arialyy/aria/core/common/RecordHandler.java
index cf8bdbd5..8e5f0c1e 100644
--- a/PublicComponent/src/main/java/com/arialyy/aria/core/common/RecordHandler.java
+++ b/PublicComponent/src/main/java/com/arialyy/aria/core/common/RecordHandler.java
@@ -30,6 +30,7 @@ import com.arialyy.aria.util.CommonUtil;
 import com.arialyy.aria.util.DbDataHelper;
 import com.arialyy.aria.util.FileUtil;
 import java.io.File;
+import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Properties;
@@ -84,6 +85,11 @@ public abstract class RecordHandler implements IRecordHandler {
       mTaskRecord = DbDataHelper.getTaskRecord(getFilePath(), mEntity.getTaskType());
       if (mTaskRecord == null) {
         initRecord(true);
+      }else if (mTaskRecord.threadRecords == null || mTaskRecord.threadRecords.size() == 0){
+        if (mTaskRecord.threadRecords == null){
+          mTaskRecord.threadRecords = new ArrayList<>();
+        }
+        initRecord(false);
       }
       handlerTaskRecord(mTaskRecord);
     }
diff --git a/PublicComponent/src/main/java/com/arialyy/aria/core/common/RecordHelper.java b/PublicComponent/src/main/java/com/arialyy/aria/core/common/RecordHelper.java
index 9942ff89..63b4200b 100644
--- a/PublicComponent/src/main/java/com/arialyy/aria/core/common/RecordHelper.java
+++ b/PublicComponent/src/main/java/com/arialyy/aria/core/common/RecordHelper.java
@@ -174,7 +174,7 @@ public class RecordHelper {
       tr.startLocation = 0;
       tr.isComplete = false;
       tr.endLocation = mWrapper.getEntity().getFileSize();
-    } else if (file.length() == mWrapper.getEntity().getFileSize()) {
+    } else if (file.length() != 0 && file.length() == mWrapper.getEntity().getFileSize()) {
       ALog.d(TAG, "文件长度一致，线程完成");
       tr.isComplete = true;
     } else {
diff --git a/app/src/main/assets/aria_config.xml b/app/src/main/assets/aria_config.xml
index 56a3067d..26626b21 100644
--- a/app/src/main/assets/aria_config.xml
+++ b/app/src/main/assets/aria_config.xml
@@ -131,7 +131,7 @@
     <!-- =============================以下为子任务的配置====================================-->
 
     <!--能同时下载的子任务最大任务数，默认3-->
-    <subMaxTaskNum value="1"/>
+    <subMaxTaskNum value="5"/>
 
     <!--子任务下载失败时的重试次数，默认为5-->
     <subReTryNum value="5"/>
diff --git a/app/src/main/java/com/arialyy/simple/core/download/group/DownloadGroupActivity.java b/app/src/main/java/com/arialyy/simple/core/download/group/DownloadGroupActivity.java
index 193080d2..b27f5231 100644
--- a/app/src/main/java/com/arialyy/simple/core/download/group/DownloadGroupActivity.java
+++ b/app/src/main/java/com/arialyy/simple/core/download/group/DownloadGroupActivity.java
@@ -163,8 +163,11 @@ public class DownloadGroupActivity extends BaseActivity<ActivityDownloadGroupBin
   }
 
   @DownloadGroup.onTaskFail() void taskFail(DownloadGroupTask task) {
-    ALog.d(TAG, "group task fail");
-    getBinding().pl.setInfo(task.getEntity());
+    if (task != null){
+
+      ALog.d(TAG, "group task fail");
+      getBinding().pl.setInfo(task.getEntity());
+    }
   }
 
   @DownloadGroup.onTaskComplete() void taskComplete(DownloadGroupTask task) {
diff --git a/app/src/main/java/com/arialyy/simple/core/download/group/GroupModule.java b/app/src/main/java/com/arialyy/simple/core/download/group/GroupModule.java
index 907e39ce..921a719b 100644
--- a/app/src/main/java/com/arialyy/simple/core/download/group/GroupModule.java
+++ b/app/src/main/java/com/arialyy/simple/core/download/group/GroupModule.java
@@ -34,8 +34,14 @@ public class GroupModule extends BaseModule {
     List<String> urls = new ArrayList<>();
     //urls.add("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1574141924275&di=a7ea1497a4a2528a45ce7103bf61adf4&imgtype=0&src=http%3A%2F%2Fg.hiphotos.baidu.com%2Fimage%2Fpic%2Fitem%2Fc2cec3fdfc03924590b2a9b58d94a4c27d1e2500.jpg");
     //urls.add("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1574141924272&di=7861479e7cb3cea98d585eaf108f056f&imgtype=0&src=http%3A%2F%2Fd.hiphotos.baidu.com%2Fimage%2Fpic%2Fitem%2F562c11dfa9ec8a13c0741f5afd03918fa0ecc01a.jpg");
-    String[] str = getContext().getResources().getStringArray(R.array.group_urls_1);
-    Collections.addAll(urls, str);
+    //String[] str = getContext().getResources().getStringArray(R.array.group_urls_1);
+    //Collections.addAll(urls, str);
+    urls.add("http://img2.imgtn.bdimg.com/it/u=3105600238,693167464&fm=26&gp=0.jpg");
+    urls.add("http://a4.att.hudong.com/22/59/19300001325156131228593878903.jpg");
+    urls.add("http://pic1.win4000.com/mobile/2019-12-16/5df71dc866a0c.jpg");
+    urls.add("http://pics4.baidu.com/feed/e824b899a9014c08545e5585620d360e7bf4f421.jpeg");
+    urls.add("http://img.blog.163.com/photo/iFUKcs6shB4PNlfxwH-yTw==/2542563464627686395.jpg");
+
     return urls;
   }
 
@@ -49,8 +55,13 @@ public class GroupModule extends BaseModule {
 
   List<String> getSubName() {
     List<String> names = new ArrayList<>();
-    String[] str = getContext().getResources().getStringArray(R.array.group_names);
-    Collections.addAll(names, str);
+    //String[] str = getContext().getResources().getStringArray(R.array.group_names);
+    //Collections.addAll(names, str);
+    names.add("1.png");
+    names.add("2.png");
+    names.add("3.png");
+    names.add("4.png");
+    names.add("5.png");
     return names;
   }