Nacos longPolling error，Nacos1.4.1服务配置文件更新一次后报错

Nacos longPolling error，Nacos longPolling error，Nacos 服务配置只能更新一次

Nacos1.4.1 RejectedExecutionException，Nacos1.4.1服务配置文件更新一次后报错

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?Copyright 蕃薯耀 2021-03-25

https://www.cnblogs.com/fanshuyao/

一、问题描述

Nacos1.4.1报错： longPolling error

Nacos1.4.1报错：java.util.concurrent.RejectedExecutionException

Nacos作为服务配置中心时，在nacos-server-1.4.1配置列表增加了相应的配置文件，在应用启动时能主动获取到配置文件进行更新，但在nacos-server-1.4.1修改了配置属性后，更新了配置，但控制台也报错，Nacos后面再也无法更新。

nacos报错：java.util.concurrent.RejectedExecutionException

2021-03-23 17:29:49.084 ERROR 15256 --- [-127.0.0.1_8848] c.a.n.client.config.impl.ClientWorker    : longPolling error : 

java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@e05e42 rejected from java.util.concurrent.ScheduledThreadPoolExecutor@ba59c84[Shutting down, pool size = 1, active threads = 1, queued tasks = 0, completed tasks = 1]
    at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2063) ~[na:1.8.0_241]
    at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:830) [na:1.8.0_241]
    at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:326) ~[na:1.8.0_241]
    at java.util.concurrent.ScheduledThreadPoolExecutor.schedule(ScheduledThreadPoolExecutor.java:533) ~[na:1.8.0_241]
    at java.util.concurrent.ScheduledThreadPoolExecutor.execute(ScheduledThreadPoolExecutor.java:622) ~[na:1.8.0_241]
    at com.alibaba.nacos.client.config.impl.ClientWorker$LongPollingRunnable.run(ClientWorker.java:635) ~[nacos-client-1.4.1.jar:na]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_241]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_241]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_241]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_241]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_241]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_241]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_241]

二、解决方案

网上的都是旧的，说什么是Mdb5不一致的问题，或者是要配置登录的账号和密码，其实是不对的。

Nacos1.4.1报错： longPolling error：真正的原因是版本不一致导致的。

Nacos1.4.1报错： longPolling error 正确的解决方案：

spring-cloud-alibaba-dependencies的版本必须使用：2.2.5.RELEASE，版本2.2.4.RELEASE都会报错。即spring-cloud-starter-alibaba-nacos-config的版本是：2.2.5.RELEASE

<dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloudgroupId>
                <artifactId>spring-cloud-dependenciesartifactId>
                <version>${spring-cloud.version}version>
                <type>pomtype>
                <scope>importscope>
            dependency>
            
            <dependency>
                <groupId>com.alibaba.cloudgroupId>
                <artifactId>spring-cloud-alibaba-dependenciesartifactId>
                <version>2.2.5.RELEASEversion>
                <type>pomtype>
                <scope>importscope>
            dependency>
        
        dependencies>
    dependencyManagement>

修改完版本后，一切都正常。折腾了好久::>_<::

对应的版本信息：

官网版本说明：

https://github.com/alibaba/spring-cloud-alibaba/wiki/%E7%89%88%E6%9C%AC%E8%AF%B4%E6%98%8E

组件版本关系

版本依赖关系(推荐使用)

spring-cloud-alibaba-dependencies版本关系对应，截图如下：

（时间宝贵，分享不易，捐赠回馈，^_^）

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?Copyright 蕃薯耀 2021-03-25

https://www.cnblogs.com/fanshuyao/