chore: bolt timeout to 45s (sofastack#245)

README.md

@@ -35,7 +35,6 @@ SOFARegistry 是蚂蚁金服开源的一个生产级、高时效、高可用的
 - [发布历史](https://www.sofastack.tech/sofa-registry/docs/ReleaseNotes)
 - [发展路线](https://www.sofastack.tech/sofa-registry/docs/RoadMap)
 - 源码解析
-   - [SlotTable](https://www.sofastack.tech/projects/sofa-registry/code-analyze/code-analyze-slottable/)
    - [发布订阅推送](https://www.sofastack.tech/projects/sofa-registry/code-analyze/code-analyze-publish-subscription-push/)
    - [registry meta 选主](https://www.sofastack.tech/projects/sofa-registry/code-analyze/code-analyze-registry-meta/)
    - [SlotTable](https://www.sofastack.tech/projects/sofa-registry/code-analyze/code-analyze-slottable/)

server/remoting/bolt/src/main/java/com/alipay/sofa/registry/remoting/bolt/exchange/BoltExchange.java

@@ -28,6 +28,7 @@
 import java.util.Arrays;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
+import org.apache.commons.lang.StringUtils;
 
 /**
  * @author shangyu.wh
@@ -44,6 +45,14 @@ public class BoltExchange implements Exchange<ChannelHandler> {
     System.setProperty(Configs.TP_QUEUE_SIZE, String.valueOf(1000 * 10));
     System.setProperty(Configs.TP_MIN_SIZE, String.valueOf(OsUtils.getCpuCount() * 10));
     System.setProperty(Configs.TP_MAX_SIZE, String.valueOf(OsUtils.getCpuCount() * 10));
+
+    // bolt.tcp.heartbeat.maxtimes * bolt.tcp.heartbeat.interval
+    // If the client has not sent heartbeat for 45 seconds, it is determined as down
+    // The default value of 90s is too long. Change it to 45s to reduce the impact of physical
+    // machine downtime
+    if (StringUtils.isEmpty(System.getProperty(Configs.TCP_SERVER_IDLE))) {
+      System.setProperty(Configs.TCP_SERVER_IDLE, String.valueOf(45000));
+    }
   }
 
   @Override