- Quartz触发线程池废弃并替换为 "XxlJobThreadPool",降低线程切换、内存占用带来的消耗,提高调度性能;

- 调度线程池隔离,拆分为"Fast"和"Slow"两个线程池,1分钟窗口期内任务耗时达500ms超过10次,该窗口期内判定为慢任务,慢任务自动降级进入"Slow"线程池,避免耗尽调度线程,提高系统稳定性;
master
xuxueli 6 years ago
parent f83d03f78a
commit 8658f8d853
  1. 1
      README.md
  2. 7
      doc/XXL-JOB官方文档.md
  3. 58
      xxl-job-admin/src/main/java/com/xxl/job/admin/core/quartz/XxlJobThreadPool.java
  4. 80
      xxl-job-admin/src/main/java/com/xxl/job/admin/core/thread/JobTriggerPoolHelper.java
  5. 11
      xxl-job-admin/src/main/resources/quartz.properties

@ -78,6 +78,7 @@ XXL-JOB是一个轻量级分布式任务调度平台,其核心设计目标是
- 30、跨平台:原生提供通用HTTP任务Handler(Bean任务,"HttpJobHandler");业务方只需要提供HTTP链接即可,不限制语言、平台;
- 31、国际化:调度中心支持国际化设置,提供中文、英文两种可选语言,默认为中文;
- 32、容器化:提供官方docker镜像,并实时更新推送dockerhub,进一步实现产品开箱即用;
- 33、线程池隔离:调度线程池进行隔离拆分,慢任务自动降级进入"Slow"线程池,避免耗尽调度线程,提高系统稳定性;;
## Development

@ -47,6 +47,7 @@ XXL-JOB是一个轻量级分布式任务调度平台,其核心设计目标是
- 30、跨平台:原生提供通用HTTP任务Handler(Bean任务,"HttpJobHandler");业务方只需要提供HTTP链接即可,不限制语言、平台;
- 31、国际化:调度中心支持国际化设置,提供中文、英文两种可选语言,默认为中文;
- 32、容器化:提供官方docker镜像,并实时更新推送dockerhub,进一步实现产品开箱即用;
- 33、线程池隔离:调度线程池进行隔离拆分,慢任务自动降级进入"Slow"线程池,避免耗尽调度线程,提高系统稳定性;;
### 1.3 发展
@ -1442,9 +1443,9 @@ Tips: 历史版本(V1.3.x)目前已经Release至稳定版本, 进入维护阶段
- 19、执行器优雅停机优化;
- 20、连接池配置优化,增强连接有效性验证;
- 21、JobHandler#msg长度限制,修复异常情况下日志超长导致内存溢出的问题;
- 22、[迭代中]任务线程隔离:
- 执行器测异步响应,不存在阻塞不需要隔离
- 调度中心共用单一调度线程池,可能导致调度阻塞需要线程隔离;调度线程池拆分为Fast/Slow两个,针对调度较慢的执行器地址请求,降级使用Slow线程池;考虑是否可以任务级隔离线程池;
- 22、Quartz触发线程池废弃并替换为 "XxlJobThreadPool",降低线程切换、内存占用带来的消耗,提高调度性能;
- 23、调度线程池隔离,拆分为"Fast"和"Slow"两个线程池,1分钟窗口期内任务耗时达500ms超过10次,该窗口期内判定为慢任务,慢任务自动降级进入"Slow"线程池,避免耗尽调度线程,提高系统稳定性
### TODO LIST
- 1、任务分片路由:分片采用一致性Hash算法计算出尽量稳定的分片顺序,即使注册机器存在波动也不会引起分批分片顺序大的波动;目前采用IP自然排序,可以满足需求,待定;

@ -0,0 +1,58 @@
package com.xxl.job.admin.core.quartz;
import org.quartz.SchedulerConfigException;
import org.quartz.spi.ThreadPool;
/**
* single thread pool, for async trigger
*
* @author xuxueli 2019-03-06
*/
public class XxlJobThreadPool implements ThreadPool {
@Override
public boolean runInThread(Runnable runnable) {
// async run
runnable.run();
return true;
//return false;
}
@Override
public int blockForAvailableThreads() {
return 1;
}
@Override
public void initialize() throws SchedulerConfigException {
}
@Override
public void shutdown(boolean waitForJobsToComplete) {
}
@Override
public int getPoolSize() {
return 1;
}
@Override
public void setInstanceId(String schedInstId) {
}
@Override
public void setInstanceName(String schedName) {
}
// support
public void setThreadCount(int count) {
//
}
}

@ -5,10 +5,9 @@ import com.xxl.job.admin.core.trigger.XxlJobTrigger;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.Map;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicInteger;
/**
* job trigger thread pool helper
@ -21,32 +20,91 @@ public class JobTriggerPoolHelper {
// ---------------------- trigger pool ----------------------
private ThreadPoolExecutor triggerPool = new ThreadPoolExecutor(
32,
256,
// fast/slow thread pool
private ThreadPoolExecutor fastTriggerPool = new ThreadPoolExecutor(
8,
200,
60L,
TimeUnit.SECONDS,
new LinkedBlockingQueue<Runnable>(1000),
new ThreadFactory() {
@Override
public Thread newThread(Runnable r) {
return new Thread(r, "xxl-job, admin JobTriggerPoolHelper-triggerPool-" + r.hashCode());
return new Thread(r, "xxl-job, admin JobTriggerPoolHelper-fastTriggerPool-" + r.hashCode());
}
});
private ThreadPoolExecutor slowTriggerPool = new ThreadPoolExecutor(
0,
100,
60L,
TimeUnit.SECONDS,
new LinkedBlockingQueue<Runnable>(2000),
new ThreadFactory() {
@Override
public Thread newThread(Runnable r) {
return new Thread(r, "xxl-job, admin JobTriggerPoolHelper-slowTriggerPool-" + r.hashCode());
}
});
// job timeout count
private volatile long minTim = System.currentTimeMillis()/60000; // ms > min
private volatile Map<Integer, AtomicInteger> jobTimeoutCountMap = new ConcurrentHashMap<>();
/**
* add trigger
*/
public void addTrigger(final int jobId, final TriggerTypeEnum triggerType, final int failRetryCount, final String executorShardingParam, final String executorParam) {
triggerPool.execute(new Runnable() {
// choose thread pool
ThreadPoolExecutor triggerPool_ = fastTriggerPool;
AtomicInteger jobTimeoutCount = jobTimeoutCountMap.get(jobId);
if (jobTimeoutCount!=null && jobTimeoutCount.get() > 10) { // job-timeout 10 times in 1 min
triggerPool_ = slowTriggerPool;
}
// trigger
triggerPool_.execute(new Runnable() {
@Override
public void run() {
XxlJobTrigger.trigger(jobId, triggerType, failRetryCount, executorShardingParam, executorParam);
long start = System.currentTimeMillis();
try {
// do trigger
XxlJobTrigger.trigger(jobId, triggerType, failRetryCount, executorShardingParam, executorParam);
} catch (Exception e) {
logger.error(e.getMessage(), e);
} finally {
// check timeout-count-map
long minTim_now = System.currentTimeMillis()/60000;
if (minTim != minTim_now) {
minTim = minTim_now;
jobTimeoutCountMap.clear();
}
// incr timeout-count-map
long cost = System.currentTimeMillis()-start;
if (cost > 500) { // ob-timeout threshold 500ms
AtomicInteger timeoutCount = jobTimeoutCountMap.put(jobId, new AtomicInteger(1));
if (timeoutCount != null) {
timeoutCount.incrementAndGet();
}
}
}
}
});
}
public void stop() {
//triggerPool.shutdown();
triggerPool.shutdownNow();
fastTriggerPool.shutdownNow();
slowTriggerPool.shutdownNow();
logger.info(">>>>>>>>> xxl-job trigger thread pool shutdown success.");
}

@ -9,16 +9,19 @@ org.quartz.scheduler.rmi.export: false
org.quartz.scheduler.rmi.proxy: false
org.quartz.scheduler.wrapJobExecutionInUserTransaction: false
org.quartz.threadPool.class: org.quartz.simpl.SimpleThreadPool
org.quartz.threadPool.threadCount: 50
org.quartz.threadPool.threadPriority: 5
org.quartz.threadPool.threadsInheritContextClassLoaderOfInitializingThread: true
#org.quartz.threadPool.class: org.quartz.simpl.SimpleThreadPool
#org.quartz.threadPool.threadCount: 5
#org.quartz.threadPool.threadPriority: 5
#org.quartz.threadPool.threadsInheritContextClassLoaderOfInitializingThread: true
org.quartz.jobStore.misfireThreshold: 60000
org.quartz.jobStore.maxMisfiresToHandleAtATime: 1
#org.quartz.jobStore.class: org.quartz.simpl.RAMJobStore
# for async trigger
org.quartz.threadPool.class: com.xxl.job.admin.core.quartz.XxlJobThreadPool
# for cluster
org.quartz.jobStore.tablePrefix: XXL_JOB_QRTZ_
org.quartz.jobStore.class: org.quartz.impl.jdbcjobstore.JobStoreTX

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