From 3e0082ce625af0ccd9aa31bb333bba0c6caac3d6 Mon Sep 17 00:00:00 2001
From: xuxueli <931591021@qq.com>
Date: Mon, 27 May 2019 20:31:02 +0800
Subject: [PATCH] update document

---
 .../com/xxl/job/admin/core/thread/JobScheduleHelper.java    | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/xxl-job-admin/src/main/java/com/xxl/job/admin/core/thread/JobScheduleHelper.java b/xxl-job-admin/src/main/java/com/xxl/job/admin/core/thread/JobScheduleHelper.java
index 3816343f..57c16e77 100644
--- a/xxl-job-admin/src/main/java/com/xxl/job/admin/core/thread/JobScheduleHelper.java
+++ b/xxl-job-admin/src/main/java/com/xxl/job/admin/core/thread/JobScheduleHelper.java
@@ -171,7 +171,7 @@ public class JobScheduleHelper {
 
                 // align second
                 try {
-                    TimeUnit.MILLISECONDS.sleep(System.currentTimeMillis()%1000 );
+                    TimeUnit.MILLISECONDS.sleep(1000 - System.currentTimeMillis()%1000 );
                 } catch (InterruptedException e) {
                     if (!toStop) {
                         logger.error(e.getMessage(), e);
@@ -181,7 +181,6 @@ public class JobScheduleHelper {
                 int lastSecond = -1;
                 while (!toStop) {
 
-                    long start = System.currentTimeMillis();
                     try {
                         // second data
                         List<Integer> ringItemData = new ArrayList<>();
@@ -219,11 +218,10 @@ public class JobScheduleHelper {
                             logger.error(">>>>>>>>>>> xxl-job, JobScheduleHelper#ringThread error:{}", e);
                         }
                     }
-                    long cost = System.currentTimeMillis() - start;
 
                     // next second, align second
                     try {
-                        TimeUnit.MILLISECONDS.sleep(1000-cost);
+                        TimeUnit.MILLISECONDS.sleep(1000 - System.currentTimeMillis()%1000);
                     } catch (InterruptedException e) {
                         if (!toStop) {
                             logger.error(e.getMessage(), e);