diff --git a/README.md b/README.md
index 2eaabf71..62e8fa8f 100644
--- a/README.md
+++ b/README.md
@@ -22,11 +22,21 @@ PowerJob（原OhMyScheduler）是全新一代分布式调度与计算框架，
 * 高可用&高性能：调度服务器经过精心设计，一改其他调度框架基于数据库锁的策略，实现了无锁化调度。部署多个调度服务器可以同时实现高可用和性能的提升（支持无限的水平扩展）。
 * 故障转移与恢复：任务执行失败后，可根据配置的重试策略完成重试，只要执行器集群有足够的计算节点，任务就能顺利完成。
 
-[在线试用地址](https://www.yuque.com/powerjob/guidence/hnbskn)
 ### 适用场景
 * 有定时执行需求的业务场景：如每天凌晨全量同步数据、生成业务报表等。
 * 有需要全部机器一同执行的业务场景：如使用广播执行模式清理集群日志。
 * 有需要分布式处理的业务场景：比如需要更新一大批数据，单机执行耗时非常长，可以使用Map/MapReduce处理器完成任务的分发，调动整个集群加速计算。
+* 有需要延迟执行某些任务的业务场景：比如订单过期处理等。
+
+### 设计目标
+PowerJob 的设计目标为企业级的分布式任务调度平台，即成为公司内部的**任务调度中间件**。整个公司统一部署调度中心 powerjob-server，旗下所有业务线应用只需要依赖 `powerjob-worker` 即可接入调度中心获取任务调度与分布式计算能力。
+
+### 在线试用
+试用地址：[try.powerjob.tech](http://try.powerjob.tech/)
+试用应用名称：powerjob-agent-test
+控制台密码：123
+
+[建议点击查看试用文档了解相关操作](https://www.yuque.com/powerjob/guidence/hnbskn)
 
 ### 同类产品对比
 |                | QuartZ                   | xxl-job                                  | SchedulerX 2.0                                    | PowerJob                                                |
@@ -43,7 +53,9 @@ PowerJob（原OhMyScheduler）是全新一代分布式调度与计算框架，
 
 
 # 文档
-**[超详细中文文档](https://www.yuque.com/powerjob/guidence/ztn4i5)** OR **[备用地址（内容可能更新不及时）](https://kfcfans.github.io/)**
+**[中文文档](https://www.yuque.com/powerjob/guidence/ztn4i5)**
+
+**[Document](https://www.yuque.com/powerjob/en/xrdoqw)**
 
 PS：感谢文档翻译平台[breword](https://www.breword.com/)对本项目英文文档翻译做出的巨大贡献！
 
diff --git a/powerjob-client/src/main/java/com/github/kfcfans/powerjob/client/OhMyClient.java b/powerjob-client/src/main/java/com/github/kfcfans/powerjob/client/OhMyClient.java
index 3ae451b5..54d00ad5 100644
--- a/powerjob-client/src/main/java/com/github/kfcfans/powerjob/client/OhMyClient.java
+++ b/powerjob-client/src/main/java/com/github/kfcfans/powerjob/client/OhMyClient.java
@@ -66,9 +66,11 @@ public class OhMyClient {
                         appId = Long.parseLong(resultDTO.getData().toString());
                         currentAddress = addr;
                         break;
+                    }else {
+                        throw new OmsException(resultDTO.getMessage());
                     }
                 }
-            }catch (Exception ignore) {
+            }catch (IOException ignore) {
             }
         }
 
diff --git a/powerjob-client/src/test/java/TestClient.java b/powerjob-client/src/test/java/TestClient.java
index 3106ea01..f1f7dec8 100644
--- a/powerjob-client/src/test/java/TestClient.java
+++ b/powerjob-client/src/test/java/TestClient.java
@@ -21,7 +21,7 @@ public class TestClient {
 
     @BeforeAll
     public static void initClient() throws Exception {
-        ohMyClient = new OhMyClient("127.0.0.1:7700", "oms-test2", null);
+        ohMyClient = new OhMyClient("127.0.0.1:7700", "powerjob-agent-test", "123");
     }
 
     @Test
@@ -70,7 +70,7 @@ public class TestClient {
 
     @Test
     public void testRunJob() throws Exception {
-        System.out.println(ohMyClient.runJob(8L, "this is instanceParams", 20));
+        System.out.println(ohMyClient.runJob(6L, "this is instanceParams", 60000));
     }
 
     @Test
diff --git a/powerjob-server/src/main/java/com/github/kfcfans/powerjob/server/akka/actors/ServerActor.java b/powerjob-server/src/main/java/com/github/kfcfans/powerjob/server/akka/actors/ServerActor.java
index 6acb41fb..fc83f9a2 100644
--- a/powerjob-server/src/main/java/com/github/kfcfans/powerjob/server/akka/actors/ServerActor.java
+++ b/powerjob-server/src/main/java/com/github/kfcfans/powerjob/server/akka/actors/ServerActor.java
@@ -10,6 +10,7 @@ import com.github.kfcfans.powerjob.common.request.WorkerNeedDeployContainerReque
 import com.github.kfcfans.powerjob.common.response.AskResponse;
 import com.github.kfcfans.powerjob.common.utils.JsonUtils;
 import com.github.kfcfans.powerjob.common.utils.NetUtils;
+import com.github.kfcfans.powerjob.server.common.constans.SwitchableStatus;
 import com.github.kfcfans.powerjob.server.common.utils.SpringUtils;
 import com.github.kfcfans.powerjob.server.persistence.core.model.ContainerInfoDO;
 import com.github.kfcfans.powerjob.server.persistence.core.repository.ContainerInfoRepository;
@@ -91,8 +92,10 @@ public class ServerActor extends AbstractActor {
 
         Optional<ContainerInfoDO> containerInfoOpt = containerInfoRepository.findById(req.getContainerId());
         AskResponse askResponse = new AskResponse();
-        askResponse.setSuccess(false);
-        if (containerInfoOpt.isPresent()) {
+        if (!containerInfoOpt.isPresent() || containerInfoOpt.get().getStatus() != SwitchableStatus.ENABLE.getV()) {
+            askResponse.setSuccess(false);
+            askResponse.setMessage("can't find container by id: " + req.getContainerId());
+        }else {
             ContainerInfoDO containerInfo = containerInfoOpt.get();
             askResponse.setSuccess(true);
 
@@ -104,7 +107,6 @@ public class ServerActor extends AbstractActor {
 
             askResponse.setData(JsonUtils.toBytes(dpReq));
         }
-
         getSender().tell(askResponse, getSelf());
     }
 
diff --git a/powerjob-server/src/main/java/com/github/kfcfans/powerjob/server/common/utils/timewheel/HashedWheelTimer.java b/powerjob-server/src/main/java/com/github/kfcfans/powerjob/server/common/utils/timewheel/HashedWheelTimer.java
index 941b12e9..b1077bb1 100644
--- a/powerjob-server/src/main/java/com/github/kfcfans/powerjob/server/common/utils/timewheel/HashedWheelTimer.java
+++ b/powerjob-server/src/main/java/com/github/kfcfans/powerjob/server/common/utils/timewheel/HashedWheelTimer.java
@@ -45,9 +45,9 @@ public class HashedWheelTimer implements Timer {
      * 新建时间轮定时器
      * @param tickDuration 时间间隔，单位毫秒（ms）
      * @param ticksPerWheel 轮盘个数
-     * @param processTaskNum 处理任务的线程个数，0代表不启用新线程（如果定时任务需要耗时操作，请启用线程池）
+     * @param processThreadNum 处理任务的线程个数，0代表不启用新线程（如果定时任务需要耗时操作，请启用线程池）
      */
-    public HashedWheelTimer(long tickDuration, int ticksPerWheel, int processTaskNum) {
+    public HashedWheelTimer(long tickDuration, int ticksPerWheel, int processThreadNum) {
 
         this.tickDuration = tickDuration;
 
@@ -60,12 +60,13 @@ public class HashedWheelTimer implements Timer {
         mask = wheel.length - 1;
 
         // 初始化执行线程池
-        if (processTaskNum <= 0) {
+        if (processThreadNum <= 0) {
             taskProcessPool = null;
         }else {
             ThreadFactory threadFactory = new ThreadFactoryBuilder().setNameFormat("HashedWheelTimer-Executor-%d").build();
             BlockingQueue<Runnable> queue = Queues.newLinkedBlockingQueue(16);
-            taskProcessPool = new ThreadPoolExecutor(2, processTaskNum,
+            int core = Math.max(Runtime.getRuntime().availableProcessors(), processThreadNum);
+            taskProcessPool = new ThreadPoolExecutor(core, 2 * core,
                     60, TimeUnit.SECONDS,
                     queue, threadFactory, new ThreadPoolExecutor.CallerRunsPolicy());
         }
diff --git a/powerjob-server/src/main/java/com/github/kfcfans/powerjob/server/web/controller/SystemInfoController.java b/powerjob-server/src/main/java/com/github/kfcfans/powerjob/server/web/controller/SystemInfoController.java
index 6d3e8bb2..1a7508ed 100644
--- a/powerjob-server/src/main/java/com/github/kfcfans/powerjob/server/web/controller/SystemInfoController.java
+++ b/powerjob-server/src/main/java/com/github/kfcfans/powerjob/server/web/controller/SystemInfoController.java
@@ -59,7 +59,7 @@ public class SystemInfoController {
         }
         String server =appInfoOpt.get().getCurrentServer();
 
-        // 没有Server
+        // 没有 Server，说明从来没有该 appId 的 worker 集群连接过
         if (StringUtils.isEmpty(server)) {
             return ResultDTO.success(Collections.emptyList());
         }
diff --git a/powerjob-worker-samples/src/main/java/com/github/kfcfans/powerjob/samples/OhMySchedulerConfig.java b/powerjob-worker-samples/src/main/java/com/github/kfcfans/powerjob/samples/OhMySchedulerConfig.java
index 55426d59..3cc8b8ca 100644
--- a/powerjob-worker-samples/src/main/java/com/github/kfcfans/powerjob/samples/OhMySchedulerConfig.java
+++ b/powerjob-worker-samples/src/main/java/com/github/kfcfans/powerjob/samples/OhMySchedulerConfig.java
@@ -31,7 +31,7 @@ public class OhMySchedulerConfig {
         // 1. 创建配置文件
         OhMyConfig config = new OhMyConfig();
         config.setPort(port);
-        config.setAppName("powerjob");
+        config.setAppName("powerjob-agent-test");
         config.setServerAddress(serverAddress);
         // 如果没有大型 Map/MapReduce 的需求，建议使用内存来加速计算
         // 为了本地模拟多个实例，只能使用 MEMORY 启动（文件只能由一个应用占有）
diff --git a/powerjob-worker/src/main/java/com/github/kfcfans/powerjob/worker/container/OmsContainerFactory.java b/powerjob-worker/src/main/java/com/github/kfcfans/powerjob/worker/container/OmsContainerFactory.java
index 0dffc768..7661f7e7 100644
--- a/powerjob-worker/src/main/java/com/github/kfcfans/powerjob/worker/container/OmsContainerFactory.java
+++ b/powerjob-worker/src/main/java/com/github/kfcfans/powerjob/worker/container/OmsContainerFactory.java
@@ -39,16 +39,21 @@ public class OmsContainerFactory {
     /**
      * 获取容器
      * @param containerId 容器ID
+     * @param loadFromServer 当本地不存在时尝试从 server 加载
      * @return 容器示例，可能为 null
      */
-    public static OmsContainer getContainer(Long containerId) {
+    public static OmsContainer fetchContainer(Long containerId, boolean loadFromServer) {
 
         OmsContainer omsContainer = CARGO.get(containerId);
         if (omsContainer != null) {
             return omsContainer;
         }
 
-        // 尝试下载
+        if (!loadFromServer) {
+            return null;
+        }
+
+        // 尝试从 server 加载
         log.info("[OmsContainer-{}] can't find the container in factory, try to deploy from server.", containerId);
         WorkerNeedDeployContainerRequest request = new WorkerNeedDeployContainerRequest(containerId);
 
@@ -66,6 +71,8 @@ public class OmsContainerFactory {
                 ServerDeployContainerRequest deployRequest = askResponse.getData(ServerDeployContainerRequest.class);
                 log.info("[OmsContainer-{}] fetch containerInfo from server successfully.", containerId);
                 deployContainer(deployRequest);
+            }else {
+                log.warn("[OmsContainer-{}] fetch containerInfo failed, reason is {}.", containerId, askResponse.getMessage());
             }
         }catch (Exception e) {
             log.error("[OmsContainer-{}] get container failed, exception is {}", containerId, e.toString());
diff --git a/powerjob-worker/src/main/java/com/github/kfcfans/powerjob/worker/container/OmsJarContainer.java b/powerjob-worker/src/main/java/com/github/kfcfans/powerjob/worker/container/OmsJarContainer.java
index f1eb08f9..6dfacce6 100644
--- a/powerjob-worker/src/main/java/com/github/kfcfans/powerjob/worker/container/OmsJarContainer.java
+++ b/powerjob-worker/src/main/java/com/github/kfcfans/powerjob/worker/container/OmsJarContainer.java
@@ -190,7 +190,7 @@ public class OmsJarContainer implements OmsContainer {
         // 需要满足的条件：引用计数器减为0 & 有更新的容器出现
         if (referenceCount.decrementAndGet() <= 0) {
 
-            OmsContainer container = OmsContainerFactory.getContainer(containerId);
+            OmsContainer container = OmsContainerFactory.fetchContainer(containerId, false);
             if (container != this) {
                 try {
                     destroy();
diff --git a/powerjob-worker/src/main/java/com/github/kfcfans/powerjob/worker/core/tracker/processor/ProcessorTracker.java b/powerjob-worker/src/main/java/com/github/kfcfans/powerjob/worker/core/tracker/processor/ProcessorTracker.java
index cc85bf8a..2fd99c0e 100644
--- a/powerjob-worker/src/main/java/com/github/kfcfans/powerjob/worker/core/tracker/processor/ProcessorTracker.java
+++ b/powerjob-worker/src/main/java/com/github/kfcfans/powerjob/worker/core/tracker/processor/ProcessorTracker.java
@@ -309,9 +309,11 @@ public class ProcessorTracker {
                 String[] split = processorInfo.split("#");
                 log.info("[ProcessorTracker-{}] try to load processor({}) in container({})", instanceId, split[1], split[0]);
 
-                omsContainer = OmsContainerFactory.getContainer(Long.valueOf(split[0]));
+                omsContainer = OmsContainerFactory.fetchContainer(Long.valueOf(split[0]), true);
                 if (omsContainer != null) {
                     processor = omsContainer.getProcessor(split[1]);
+                }else {
+                    log.warn("[ProcessorTracker-{}] load container failed.", instanceId);
                 }
                 break;
             default: