dubbo 服务注册太慢
问题描述
我们在做公募的时候发现dubbo注册注册服务太慢,启动服务需要等很久。懒加载会造成客户体验不好,。在查看源代码后发现dubbo注册是锁注册方法。
问题出现的环境背景及自己尝试过哪些方法
相关代码
// 请把代码文本粘贴到下方(请勿用图片代替代码)
注册日志
2018-09-28 10:34:29,084[com.alibaba.dubbo.config.AbstractConfig]- [DUBBO] Refer dubbo service com.fulihui.sign.facade.admin.SignRemarkAdminService from url zookeeper://192.168.1.45:2181/com.alibaba.dubbo.registry.RegistryService?anyhost=true&application=com.fulihui.kirin.promobizmanage&check=false&default.check=false&default.lazy=true&default.retries=0&default.timeout=5000&default.validation=true&default.version=1.0.0&dubbo=2.8.4&generic=false&interface=com.fulihui.sign.facade.admin.SignRemarkAdminService&methods=selectLimitPage,update,insert,selectById,insertOrUpdate&pid=1932&revision=1.0.0&serialization=json&side=consumer×tamp=1538102068414&version=1.0.0, dubbo version: 2.8.4, current host: 192.168.4.140
2018-09-28 10:34:29,154[alibaba.dubbo.registry.zookeeper.ZookeeperRegistry]- [DUBBO] Register: consumer://192.168.4.140/com.fulihui.sign.facade.admin.SignInStatAdminService?application=com.fulihui.kirin.promobizmanage&category=consumers&check=false&default.check=false&default.lazy=true&default.retries=0&default.timeout=5000&default.validation=true&default.version=1.0.0&dubbo=2.8.4&interface=com.fulihui.sign.facade.admin.SignInStatAdminService&methods=querySignInStat&pid=1932&revision=1.0.0&side=consumer×tamp=1538102069150&version=1.0.0, dubbo version: 2.8.4, current host: 192.168.4.140
2018-09-28 10:34:29,324[alibaba.dubbo.registry.zookeeper.ZookeeperRegistry]- [DUBBO] Subscribe: consumer://192.168.4.140/com.fulihui.sign.facade.admin.SignInStatAdminService?application=com.fulihui.kirin.promobizmanage&category=providers,configurators,routers&default.check=false&default.lazy=true&default.retries=0&default.timeout=5000&default.validation=true&default.version=1.0.0&dubbo=2.8.4&interface=com.fulihui.sign.facade.admin.SignInStatAdminService&methods=querySignInStat&pid=1932&revision=1.0.0&side=consumer×tamp=1538102069150&version=1.0.0, dubbo version: 2.8.4, current host: 192.168.4.140
你期待的结果是什么?实际看到的错误信息又是什么?
我建议可以把所有的注册URL放到一个容器(比如List,Map等)里面。用锁 锁住容器的下标,配置线程个数去轮训注册。
不如 像这样的代码,有可能注册会快一些:
private static final Lock INDEX_LOCK = new ReentrantLock();
private static Integer index = 0;
public static void main(String[] args) throws InterruptedException {
final ArrayList<Integer> arrayList = new ArrayList<Integer>();
Long count = 99999L;
for (int i = 0; i < count; i++) {
arrayList.add(i);
}
CountDownLatch latch = new CountDownLatch(10);
System.out.println("开始输出");
for (int i = 0; i < 10; i++) {
new Thread(new Runnable() {
@Override
public void run() {
while(true) {
try {
index = getIndex(arrayList.size()-1);
if(index == -1) {
break;
}
System.out.println(arrayList.get(index));
}finally {
latch.countDown();
}
}
}
}).start();
latch.await();
System.out.println("OK");
}
}
public static int getIndex(int count) {
try {
INDEX_LOCK.lock();
if (index < count) {
index = index+ 1;
return index;
}
return -1;
} finally {
INDEX_LOCK.unlock();
}
}
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