diff --git a/Aria/src/main/java/com/arialyy/aria/core/queue/DownloadTaskQueue.java b/Aria/src/main/java/com/arialyy/aria/core/queue/DownloadTaskQueue.java
index 06228179..d4a8f86a 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/queue/DownloadTaskQueue.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/queue/DownloadTaskQueue.java
@@ -89,21 +89,15 @@ public class DownloadTaskQueue implements ITaskQueue {
 
   @Override public void stopTask(Task task) {
     if (!task.isDownloading()) Log.w(TAG, "停止任务失败,【任务已经停止】");
-    task.stop();
-    //if (task.isDownloading()) {
-    //  if (mExecutePool.removeTask(task)) {
-    //    task.stop();
-    //  }
-    //} else {
-    //  task.stop();
-    //  Log.w(TAG, "停止任务失败,【任务已经停止】");
-    //}
+    if (mExecutePool.removeTask(task)) {
+      task.stop();
+    } else {
+      task.stop();
+      Log.w(TAG, "停止任务失败,【任务已经停止】");
+    }
   }
 
   @Override public void cancelTask(Task task) {
-    //if (mExecutePool.removeTask(task) || mCachePool.removeTask(task)) {
-    //  task.cancel();
-    //}
     task.cancel();
   }
 
@@ -119,10 +113,6 @@ public class DownloadTaskQueue implements ITaskQueue {
     }
   }
 
-  //@Override public IDownloadSchedulers getDownloadSchedulers() {
-  //  return mSchedulers;
-  //}
-
   @Override public int size() {
     return mExecutePool.size();
   }
@@ -159,12 +149,10 @@ public class DownloadTaskQueue implements ITaskQueue {
   @Override public Task createTask(String target, DownloadEntity entity) {
     Task task;
     if (TextUtils.isEmpty(target)) {
-      //task = TaskFactory.getInstance().createTask(mContext, entity, mSchedulers);
       task =
           TaskFactory.getInstance().createTask(mContext, entity, DownloadSchedulers.getInstance());
     } else {
       task = TaskFactory.getInstance()
-          //.createTask(target.getClass().getName(), mContext, entity, mSchedulers);
           .createTask(target, mContext, entity, DownloadSchedulers.getInstance());
     }
     mCachePool.putTask(task);
@@ -197,29 +185,15 @@ public class DownloadTaskQueue implements ITaskQueue {
     return mCachePool.pollTask();
   }
 
-  //@Override public void setScheduler(IDownloadSchedulers schedulers) {
-  //  mSchedulers = schedulers;
-  //}
-
   public static class Builder {
     Context context;
-    IDownloadSchedulers schedulers;
 
     public Builder(Context context) {
       this.context = context.getApplicationContext();
     }
 
-    //public Builder setDownloadSchedulers(IDownloadSchedulers schedulers) {
-    //  this.schedulers = schedulers;
-    //  return this;
-    //}
-
     public DownloadTaskQueue build() {
       DownloadTaskQueue queue = new DownloadTaskQueue(context);
-      //if (schedulers == null) {
-      //  schedulers = DownloadSchedulers.getInstance();
-      //}
-      //queue.setScheduler(schedulers);
       return queue;
     }
   }
diff --git a/Aria/src/main/java/com/arialyy/aria/core/queue/ITaskQueue.java b/Aria/src/main/java/com/arialyy/aria/core/queue/ITaskQueue.java
index 73163766..68576119 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/queue/ITaskQueue.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/queue/ITaskQueue.java
@@ -73,11 +73,4 @@ public interface ITaskQueue extends IDownloader {
    * @return 下载任务 or null
    */
   public Task getNextTask();
-
-  ///**
-  // * 设置下载调度器
-  // *
-  // * @param schedulers 下载调度器{@link IDownloadSchedulers}
-  // */
-  //public void setScheduler(IDownloadSchedulers schedulers);
 }
\ No newline at end of file
diff --git a/Aria/src/main/java/com/arialyy/aria/core/scheduler/DownloadSchedulers.java b/Aria/src/main/java/com/arialyy/aria/core/scheduler/DownloadSchedulers.java
index 5f5b8a4e..22a7d283 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/scheduler/DownloadSchedulers.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/scheduler/DownloadSchedulers.java
@@ -16,6 +16,7 @@
 
 package com.arialyy.aria.core.scheduler;
 
+import android.os.CountDownTimer;
 import android.os.Message;
 import android.text.TextUtils;
 import android.util.Log;
@@ -154,10 +155,8 @@ public class DownloadSchedulers implements IDownloadSchedulers {
 
   private void callback(int state, Task task, OnSchedulerListener listener) {
     if (listener != null) {
-      //Task task = mQueue.getTask(entity);
       if (task == null) {
-        //Log.e(TAG, "队列中没有下载链接【" + entity.getDownloadUrl() + "】的任务");
-        Log.e(TAG, "传递的下载任务");
+        Log.e(TAG, "TASK 为null,回调失败");
         return;
       }
       switch (state) {
@@ -195,9 +194,13 @@ public class DownloadSchedulers implements IDownloadSchedulers {
    * @param entity 失败实体
    */
   @Override public void handleFailTask(final DownloadEntity entity) {
-    new Thread(new Runnable() {
-      @Override public void run() {
-        final Configuration config = Configuration.getInstance();
+    final Configuration config = Configuration.getInstance();
+    CountDownTimer timer = new CountDownTimer(config.getReTryInterval(), 1000) {
+      @Override public void onTick(long millisUntilFinished) {
+
+      }
+
+      @Override public void onFinish() {
         if (entity.getFailNum() <= config.getReTryNum()) {
           Task task = mQueue.getTask(entity);
           mQueue.reTryStart(task);
@@ -210,7 +213,8 @@ public class DownloadSchedulers implements IDownloadSchedulers {
           startNextTask(entity);
         }
       }
-    }).start();
+    };
+    timer.start();
   }
 
   /**
diff --git a/Aria/src/main/java/com/arialyy/aria/core/task/DownloadUtil.java b/Aria/src/main/java/com/arialyy/aria/core/task/DownloadUtil.java
index c69ee94a..d5eb65e2 100644
--- a/Aria/src/main/java/com/arialyy/aria/core/task/DownloadUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/core/task/DownloadUtil.java
@@ -242,12 +242,16 @@ final class DownloadUtil implements IDownloadUtil, Runnable {
         handleBreakpoint(conn);
       } else if (code == HttpURLConnection.HTTP_OK || len < 0) {
         //在conn.setRequestProperty("Range", "bytes=" + 0 + "-");下,200为不支持断点状态
+        if (len < 0){
+          failDownload("任务【" + mDownloadEntity.getDownloadUrl() + "】下载失败,文件长度小于0");
+          return;
+        }
         isSupportBreakpoint = false;
         mListener.supportBreakpoint(false);
         Log.w(TAG, "该下载链接不支持断点下载");
         handleBreakpoint(conn);
       } else {
-        failDownload("下载失败,返回码:" + code);
+        failDownload("任务【" + mDownloadEntity.getDownloadUrl() + "】下载失败,返回码:" + code);
       }
     } catch (IOException e) {
       failDownload("下载失败【downloadUrl:"
diff --git a/Aria/src/main/java/com/arialyy/aria/orm/DbUtil.java b/Aria/src/main/java/com/arialyy/aria/orm/DbUtil.java
index 4f6fe2b1..10b64600 100644
--- a/Aria/src/main/java/com/arialyy/aria/orm/DbUtil.java
+++ b/Aria/src/main/java/com/arialyy/aria/orm/DbUtil.java
@@ -113,7 +113,6 @@ public class DbUtil {
       params[i] = "'" + expression[i + 1] + "'";
     }
     sql = String.format(sql, params);
-    Log.d(TAG, sql);
     print(DEL_DATA, sql);
     mDb.execSQL(sql);
     close();
@@ -185,7 +184,6 @@ public class DbUtil {
       params[i] = "'" + expression[i + 1] + "'";
     }
     sql = String.format(sql, params);
-    Log.d(TAG, sql);
     print(FIND_DATA, sql);
     Cursor cursor = mDb.rawQuery(sql, null);
     return cursor.getCount() > 0 ? newInstanceEntity(clazz, cursor) : null;