diff --git a/src/com/zdemo/cachex/RedisCacheSource.java b/src/com/zdemo/cachex/RedisCacheSource.java
index a1583e2..fcbe6a4 100644
--- a/src/com/zdemo/cachex/RedisCacheSource.java
+++ b/src/com/zdemo/cachex/RedisCacheSource.java
@@ -2218,7 +2218,7 @@ abstract class ReplyCompletionHandler implements CompletionHandler<Integer, Byte
             out.removeLastByte();//读掉 \r
             //buffer.get();//读掉 \n
             //logger.info("打印buffer.get()---> " + buffer.get());
-            logger.info("--- 打印buffer start --- ");
+            //logger.info("--- 打印buffer start --- ");
             return;//传null则表示使用StandardCharsets.UTF_8
         }
         if (has) out.write(lasted);
diff --git a/src/com/zdemo/zhub/Delays.java b/src/com/zdemo/zhub/Delays.java
new file mode 100644
index 0000000..8466b97
--- /dev/null
+++ b/src/com/zdemo/zhub/Delays.java
@@ -0,0 +1,72 @@
+package com.zdemo.zhub;
+
+import java.util.concurrent.DelayQueue;
+import java.util.concurrent.Delayed;
+import java.util.concurrent.TimeUnit;
+import java.util.function.Supplier;
+import java.util.logging.Logger;
+
+public class Delays implements Delayed, Runnable {
+    public Logger logger = Logger.getLogger(Delays.class.getSimpleName());
+
+    private long time;          // 执行时间
+    private Runnable runnable;  // 任务到时间执行 runnable
+
+    public Delays(long timeout, Runnable runnable) {
+        this.time = System.currentTimeMillis() + timeout;
+        this.runnable = runnable;
+    }
+
+    @Override
+    public long getDelay(TimeUnit unit) {
+        return unit.convert(time - System.currentTimeMillis(), TimeUnit.MILLISECONDS);
+    }
+
+    @Override
+    public int compareTo(Delayed other) {
+        if (other == this) { // compare zero ONLY if same object
+            return 0;
+        }
+        if (other instanceof Delays) {
+            Delays x = (Delays) other;
+            long diff = time - x.time;
+            if (diff < 0) {
+                return -1;
+            } else if (diff > 0) {
+                return 1;
+            }
+        }
+        long d = (getDelay(TimeUnit.NANOSECONDS) -
+                other.getDelay(TimeUnit.NANOSECONDS));
+        return (d == 0) ? 0 : ((d < 0) ? -1 : 1);
+    }
+
+    @Override
+    public void run() {
+        runnable.run();
+    }
+
+    // ===========
+    public static DelayQueue<Delays> delayQueue = new DelayQueue<>();
+
+    public static void addDelay(long timeout, Runnable runnable) {
+        delayQueue.add(new Delays(timeout, runnable));
+    }
+
+    public static void tryDelay(Supplier<Boolean> supplier, long delayMillis, int maxCount) {
+
+    }
+
+    static {
+        new Thread(() -> {
+            try {
+                while (true) {
+                    Delays delay = delayQueue.take();
+                    delay.run(); //异常会导致延时队列失败
+                }
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+        }).start();
+    }
+}
diff --git a/src/com/zdemo/zhub/ZHubClient.java b/src/com/zdemo/zhub/ZHubClient.java
index a7fd685..e7cb105 100644
--- a/src/com/zdemo/zhub/ZHubClient.java
+++ b/src/com/zdemo/zhub/ZHubClient.java
@@ -506,6 +506,11 @@ public class ZHubClient extends AbstractConsumer implements IConsumer, IProducer
 
     @Comment("rpc call")
     public <T, R> RpcResult<R> rpc(String topic, T v, TypeToken<R> typeToken) {
+        return rpc(topic, v, typeToken, 0);
+    }
+
+    @Comment("rpc call")
+    public <T, R> RpcResult<R> rpc(String topic, T v, TypeToken<R> typeToken, long timeout) {
         Rpc rpc = new Rpc<>(APP_NAME, Utility.uuid(), topic, v);
         String ruk = rpc.getRuk();
         rpcMap.put(ruk, rpc);
@@ -513,14 +518,29 @@ public class ZHubClient extends AbstractConsumer implements IConsumer, IProducer
             rpcRetType.put(ruk, typeToken);
         }
         try {
-            publish(topic, rpc);
+            publish(topic, rpc); // send("rpc", topic, toStr(rpc));
             synchronized (rpc) {
-                rpc.wait(); //todo: 调用超时处理
+                if (timeout <= 0) {
+                    timeout = 1000 * 15;
+                }
+                // call timeout default: 15s
+                Delays.addDelay(timeout, () -> {
+                    RpcResult rpcResult = rpc.buildResp(505, "请求超时");
+                    rpc.setRpcResult(rpcResult);
+                    synchronized (rpc) {
+                        logger.warning("rpc timeout: " + convert.convertTo(rpc));
+                        rpc.notify();
+                    }
+                });
+
+                rpc.wait();
                 rpcMap.remove(ruk);
             }
         } catch (InterruptedException e) {
             e.printStackTrace();
-            // todo: 设置请求失败
+            // call error
+            RpcResult rpcResult = rpc.buildResp(501, "请求失败");
+            rpc.setRpcResult(rpcResult);
         }
         return rpc.getRpcResult();
     }
@@ -533,6 +553,14 @@ public class ZHubClient extends AbstractConsumer implements IConsumer, IProducer
         return CompletableFuture.supplyAsync(() -> rpc(topic, v, typeToken));
     }
 
+    public <T, R> CompletableFuture<RpcResult<R>> rpcAsync(String topic, T v, long timeout) {
+        return CompletableFuture.supplyAsync(() -> rpc(topic, v, null, timeout));
+    }
+
+    public <T, R> CompletableFuture<RpcResult<R>> rpcAsync(String topic, T v, TypeToken<R> typeToken, long timeout) {
+        return CompletableFuture.supplyAsync(() -> rpc(topic, v, typeToken, timeout));
+    }
+
     // RpcResult: {ruk:xxx-xxxx, retcode:0}
     @Comment("rpc call back consumer")
     private void rpcAccept(String value) {