diff --git a/Aria/src/main/java/com/arialyy/aria/core/command/StartCmd.java b/Aria/src/main/java/com/arialyy/aria/core/command/StartCmd.java
index f6b7cc2c..54fcdec0 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/command/StartCmd.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/command/StartCmd.java
@@ -29,7 +29,7 @@ import com.arialyy.aria.util.NetUtils;
  */
 final public class StartCmd<T extends AbsTaskWrapper> extends AbsNormalCmd<T> {
 
-  private boolean newStart = false;
+  private boolean nowStart = false;
 
   StartCmd(T entity, int taskType) {
     super(entity, taskType);
@@ -38,10 +38,10 @@ final public class StartCmd<T extends AbsTaskWrapper> extends AbsNormalCmd<T> {
   /**
    * 立即执行任务
    *
-   * @param newStart true 立即执行任务，无论执行队列是否满了
+   * @param nowStart true 立即执行任务，无论执行队列是否满了
    */
-  public void setNewStart(boolean newStart) {
-    this.newStart = newStart;
+  public void setNowStart(boolean nowStart) {
+    this.nowStart = nowStart;
   }
 
   @Override public void executeCmd() {
@@ -82,7 +82,7 @@ final public class StartCmd<T extends AbsTaskWrapper> extends AbsNormalCmd<T> {
             startTask();
           }
         } else {
-          if (newStart) {
+          if (nowStart) {
             startTask();
           } else {
             sendWaitState(task);
@@ -92,7 +92,19 @@ final public class StartCmd<T extends AbsTaskWrapper> extends AbsNormalCmd<T> {
     } else {
       //任务没执行并且执行队列中没有该任务，才认为任务没有运行中
       if (!mQueue.taskIsRunning(task.getKey())) {
-        resumeTask();
+        if (mod.equals(QueueMod.NOW.getTag())) {
+          resumeTask();
+        } else {
+          if (mQueue.getCurrentExePoolNum() < maxTaskNum) {
+            resumeTask();
+          } else {
+            if (nowStart) {
+              resumeTask();
+            } else {
+              sendWaitState(task);
+            }
+          }
+        }
       } else {
         ALog.w(TAG, String.format("任务【%s】已经在运行", task.getTaskName()));
       }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/common/controller/NormalController.java b/Aria/src/main/java/com/arialyy/aria/core/common/controller/NormalController.java
index f1c18a22..3a5a6cd8 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/common/controller/NormalController.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/common/controller/NormalController.java
@@ -66,7 +66,7 @@ public final class NormalController extends FeatureController implements INormal
       StartCmd cmd =
           (StartCmd) CmdHelper.createNormalCmd(getTaskWrapper(), NormalCmdFactory.TASK_START,
               checkTaskType());
-      cmd.setNewStart(newStart);
+      cmd.setNowStart(newStart);
       EventMsgUtil.getDefault()
           .post(cmd);
     }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/queue/AbsTaskQueue.java b/Aria/src/main/java/com/arialyy/aria/core/queue/AbsTaskQueue.java
index 749d2732..825744df 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/queue/AbsTaskQueue.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/queue/AbsTaskQueue.java
@@ -113,6 +113,10 @@ public abstract class AbsTaskQueue<TASK extends AbsTask, TASK_WRAPPER extends Ab
       ALog.w(TAG, "resume task fail, task is null");
       return;
     }
+    if (mExecutePool.taskExits(task.getKey())) {
+      ALog.w(TAG, String.format("task【%s】running", task.getKey()));
+      return;
+    }
     if (mExecutePool.size() >= getMaxTaskNum()) {
       task.getTaskWrapper().getEntity().setState(IEntity.STATE_WAIT);
       mCachePool.putTaskToFirst(task);
diff --git a/DEV_LOG.md b/DEV_LOG.md
index 44712ecc..86ef3d80 100644
--- a/DEV_LOG.md
+++ b/DEV_LOG.md
@@ -1,7 +1,9 @@
 ## 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
-
+    - 修复40x错误，会继续重试并且无法重试成功的问题 https://github.com/AriaLyy/Aria/issues/619
+    - 修复wait模式下，resume(true)无效问题
+    - 修复now模式下的一些问题 https://github.com/AriaLyy/Aria/issues/620
   + 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/FtpComponent/src/main/java/com/arialyy/aria/ftp/upload/FtpULoader.java b/FtpComponent/src/main/java/com/arialyy/aria/ftp/upload/FtpULoader.java
index 07278e60..5b17677c 100644
--- a/FtpComponent/src/main/java/com/arialyy/aria/ftp/upload/FtpULoader.java
+++ b/FtpComponent/src/main/java/com/arialyy/aria/ftp/upload/FtpULoader.java
@@ -37,6 +37,9 @@ final class FtpULoader extends NormalLoader<UTaskWrapper> {
 
   @Override
   protected void startThreadTask() {
+    if (isBreak()) {
+      return;
+    }
     // 检查记录
     ((FtpURecordHandler) mRecordHandler).setFtpFile(ftpFile);
     if (mRecordHandler.checkTaskCompleted()) {
diff --git a/HttpComponent/src/main/java/com/arialyy/aria/http/HttpRecordHandler.java b/HttpComponent/src/main/java/com/arialyy/aria/http/HttpRecordHandler.java
index c714a846..aa3d0dea 100644
--- a/HttpComponent/src/main/java/com/arialyy/aria/http/HttpRecordHandler.java
+++ b/HttpComponent/src/main/java/com/arialyy/aria/http/HttpRecordHandler.java
@@ -36,13 +36,6 @@ public final class HttpRecordHandler extends RecordHandler {
     super(wrapper);
   }
 
-  @Override public void onPre() {
-    super.onPre();
-    //if (getWrapper().getRequestType() == ITaskWrapper.U_HTTP) {
-    //  RecordUtil.delTaskRecord(getEntity().getFilePath(), IRecordHandler.TYPE_UPLOAD);
-    //}
-  }
-
   @Override public void handlerTaskRecord(TaskRecord record) {
     RecordHelper helper = new RecordHelper(getWrapper(), record);
     if (getWrapper().isSupportBP() && record.threadNum > 1) {
diff --git a/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDThreadTaskAdapter.java b/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDThreadTaskAdapter.java
index 745a07b6..4ec147b4 100644
--- a/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDThreadTaskAdapter.java
+++ b/HttpComponent/src/main/java/com/arialyy/aria/http/download/HttpDThreadTaskAdapter.java
@@ -43,7 +43,7 @@ import java.util.Set;
  * Created by lyy on 2017/1/18. 下载线程
  */
 final class HttpDThreadTaskAdapter extends BaseHttpThreadTaskAdapter {
-  private final String TAG = "HttpThreadTask";
+  private final String TAG = "HttpDThreadTaskAdapter";
   private DTaskWrapper mTaskWrapper;
 
   HttpDThreadTaskAdapter(SubThreadConfig config) {
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 63b4200b..59adb0d8 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
@@ -130,13 +130,17 @@ public class RecordHelper {
           /*
            * 检查记录文件
            */
-          if (blockFileLen == threadRect) {
+          if (blockFileLen == threadRect && blockFileLen != 0) {
             ALog.i(TAG, String.format("分块【%s】已完成，更新记录", temp.getPath()));
             tr.startLocation = blockFileLen;
             tr.isComplete = true;
           } else if (tr.startLocation != realLocation) { // 处理记录小于分块文件长度的情况
             ALog.i(TAG, String.format("修正分块【%s】的进度记录为：%s", temp.getPath(), realLocation));
             tr.startLocation = realLocation;
+          }else {
+            ALog.i(TAG, String.format("修正分块【%s】的进度记录为：%s", temp.getPath(), realLocation));
+            tr.startLocation = realLocation;
+            tr.isComplete = false;
           }
         } else {
           ALog.i(TAG, String.format("分块【%s】已完成", temp.getPath()));
diff --git a/PublicComponent/src/main/java/com/arialyy/aria/core/loader/NormalLoader.java b/PublicComponent/src/main/java/com/arialyy/aria/core/loader/NormalLoader.java
index 5d440860..f3a2b635 100644
--- a/PublicComponent/src/main/java/com/arialyy/aria/core/loader/NormalLoader.java
+++ b/PublicComponent/src/main/java/com/arialyy/aria/core/loader/NormalLoader.java
@@ -28,6 +28,7 @@ import com.arialyy.aria.core.manager.ThreadTaskManager;
 import com.arialyy.aria.core.task.IThreadTask;
 import com.arialyy.aria.core.wrapper.AbsTaskWrapper;
 import com.arialyy.aria.exception.AriaException;
+import com.arialyy.aria.util.ALog;
 import com.arialyy.aria.util.FileUtil;
 import java.io.File;
 
@@ -99,6 +100,9 @@ public class NormalLoader<T extends AbsTaskWrapper> extends AbsNormalLoader<T> {
   }
 
   protected void startThreadTask() {
+    if (isBreak()){
+      return;
+    }
 
     if (getListener() instanceof IDLoadListener) {
       ((IDLoadListener) getListener()).onPostPre(getEntity().getFileSize());
diff --git a/PublicComponent/src/main/java/com/arialyy/aria/core/loader/SubLoader.java b/PublicComponent/src/main/java/com/arialyy/aria/core/loader/SubLoader.java
index e98e3157..789ff3f5 100644
--- a/PublicComponent/src/main/java/com/arialyy/aria/core/loader/SubLoader.java
+++ b/PublicComponent/src/main/java/com/arialyy/aria/core/loader/SubLoader.java
@@ -93,6 +93,10 @@ public final class SubLoader implements ILoader, ILoaderVisitor {
   }
 
   private void handlerTask() {
+    if (isBreak()){
+      return;
+    }
+
     record = recordHandler.getRecord(wrapper.getEntity().getFileSize());
     if (record.threadRecords != null
         && !TextUtils.isEmpty(record.filePath)
diff --git a/SFtpComponent/src/main/java/com/arialyy/aria/sftp/download/SFtpDLoader.java b/SFtpComponent/src/main/java/com/arialyy/aria/sftp/download/SFtpDLoader.java
index 2a3b68a3..3c497591 100644
--- a/SFtpComponent/src/main/java/com/arialyy/aria/sftp/download/SFtpDLoader.java
+++ b/SFtpComponent/src/main/java/com/arialyy/aria/sftp/download/SFtpDLoader.java
@@ -87,6 +87,9 @@ final class SFtpDLoader extends AbsNormalLoader<DTaskWrapper> {
   }
 
   private void startThreadTask() {
+    if (isBreak()) {
+      return;
+    }
 
     if (getListener() instanceof IDLoadListener) {
       ((IDLoadListener) getListener()).onPostPre(getEntity().getFileSize());
diff --git a/SFtpComponent/src/main/java/com/arialyy/aria/sftp/upload/SFtpULoader.java b/SFtpComponent/src/main/java/com/arialyy/aria/sftp/upload/SFtpULoader.java
index 34cda951..0448ccb3 100644
--- a/SFtpComponent/src/main/java/com/arialyy/aria/sftp/upload/SFtpULoader.java
+++ b/SFtpComponent/src/main/java/com/arialyy/aria/sftp/upload/SFtpULoader.java
@@ -86,6 +86,9 @@ final class SFtpULoader extends AbsNormalLoader<UTaskWrapper> {
   }
 
   private void startThreadTask(SftpATTRS attrs) {
+    if (isBreak()) {
+      return;
+    }
 
     if (getListener() instanceof IDLoadListener) {
       ((IDLoadListener) getListener()).onPostPre(getEntity().getFileSize());
diff --git a/app/src/main/assets/aria_config.xml b/app/src/main/assets/aria_config.xml
index 26626b21..4f373352 100644
--- a/app/src/main/assets/aria_config.xml
+++ b/app/src/main/assets/aria_config.xml
@@ -22,7 +22,7 @@
   <download>
 
     <!--设置任务最大下载速度，0表示不限速，单位为：kb-->
-    <maxSpeed value="0"/>
+    <maxSpeed value="200"/>
 
     <!--
       多线程下载是否使用块下载模式，{@code true}使用，{@code false}不使用
@@ -44,7 +44,7 @@
     <threadNum value="3"/>
 
     <!--设置下载队列最大任务数， 默认为2-->
-    <maxTaskNum value="1"/>
+    <maxTaskNum value="2"/>
 
     <!--设置下载失败，重试次数，默认为10-->
     <reTryNum value="5"/>
@@ -68,7 +68,7 @@
     <convertSpeed value="true"/>
 
     <!--执行队列类型，见com.arialyy.aria.core.QueueMod，默认类型为wait-->
-    <queueMod value="wait"/>
+    <queueMod value="now"/>
 
     <!--进度更新更新间隔，默认1000毫秒-->
     <updateInterval value="1000"/>
diff --git a/build.gradle b/build.gradle
index d3a5f112..e1fcdec4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -44,8 +44,8 @@ task clean(type: Delete) {
 }
 
 ext {
-  versionCode = 386
-  versionName = '3.8.6'
+  versionCode = 387
+  versionName = '3.8.7-beta-1'
   userOrg = 'arialyy'
   groupId = 'com.arialyy.aria'
   publishVersion = versionName