From 27790b9f6ac22b93c8f4ec3eb34a242882073993 Mon Sep 17 00:00:00 2001
From: evanxuhe <evanxuhe@163.com>
Date: Thu, 25 Jul 2019 17:42:27 +0800
Subject: [PATCH] Fix bug: Agent never update its Instance HeartbeatTime
 (#3167)

---
 .../apm/agent/core/remote/AppAndServiceRegisterClient.java      | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/AppAndServiceRegisterClient.java b/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/AppAndServiceRegisterClient.java
index 666581c684..13fa40c90b 100644
--- a/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/AppAndServiceRegisterClient.java
+++ b/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/remote/AppAndServiceRegisterClient.java
@@ -131,7 +131,7 @@ public class AppAndServiceRegisterClient implements BootService, GRPCChannelList
                                     = instanceMapping.getApplicationInstanceId();
                             }
                         } else {
-                            if (lastSegmentTime - System.currentTimeMillis() > 60 * 1000) {
+                            if ( System.currentTimeMillis() - lastSegmentTime > 60 * 1000) {
                                 instanceDiscoveryServiceBlockingStub.heartbeat(ApplicationInstanceHeartbeat.newBuilder()
                                     .setApplicationInstanceId(RemoteDownstreamConfig.Agent.APPLICATION_INSTANCE_ID)
                                     .setHeartbeatTime(System.currentTimeMillis())
-- 
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