Nacos longPolling error，Nacos longPolling error，Nacos 服務配置只能更新一次
Nacos1.4.1 RejectedExecutionException，Nacos1.4.1服務配置文件更新一次后報錯
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©Copyright 蕃薯耀 2021-03-25
https://www.cnblogs.com/fanshuyao/
一、問題描述
Nacos1.4.1報錯： longPolling error
Nacos1.4.1報錯：java.util.concurrent.RejectedExecutionException
Nacos作為服務配置中心時，在nacos-server-1.4.1配置列表增加了相應的配置文件，在應用啟動時能主動獲取到配置文件進行更新，但在nacos-server-1.4.1修改了配置屬性后，更新了配置，但控制台也報錯，Nacos后面再也無法更新。
nacos報錯：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$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_241] at java.lang.Thread.run(Thread.java:748) [na:1.8.0_241]
二、解決方案
網上的都是舊的，說什么是Mdb5不一致的問題，或者是要配置登錄的賬號和密碼，其實是不對的。
Nacos1.4.1報錯： longPolling error：真正的原因是版本不一致導致的。
Nacos1.4.1報錯： longPolling error 正確的解決方案：
spring-cloud-alibaba-dependencies的版本必須使用：2.2.5.RELEASE，版本2.2.4.RELEASE都會報錯。即spring-cloud-starter-alibaba-nacos-config的版本是：2.2.5.RELEASE
<dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version><!--這里是：Hoxton.SR10--> <type>pom</type> <scope>import</scope> </dependency> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-alibaba-dependencies</artifactId> <version>2.2.5.RELEASE</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement>
修改完版本后，一切都正常。折騰了好久::>_<::
對應的版本信息：
官網版本說明：
https://github.com/alibaba/spring-cloud-alibaba/wiki/%E7%89%88%E6%9C%AC%E8%AF%B4%E6%98%8E
組件版本關系
| Spring Cloud Alibaba Version | Sentinel Version | Nacos Version | RocketMQ Version | Dubbo Version | Seata Version |
|---|---|---|---|---|---|
| 2.2.5.RELEASE or 2.1.4.RELEASE or 2.0.4.RELEASE |
1.8.0 |
1.4.1 |
4.4.0 |
2.7.8 |
1.3.0 |
| 2.2.3.RELEASE or 2.1.3.RELEASE or 2.0.3.RELEASE |
1.8.0 |
1.3.3 |
4.4.0 |
2.7.8 |
1.3.0 |
| 2.2.1.RELEASE or 2.1.2.RELEASE or 2.0.2.RELEASE |
1.7.1 |
1.2.1 |
4.4.0 |
2.7.6 |
1.2.0 |
| 2.2.0.RELEASE |
1.7.1 |
1.1.4 |
4.4.0 |
2.7.4.1 |
1.0.0 |
| 2.1.1.RELEASE or 2.0.1.RELEASE or 1.5.1.RELEASE |
1.7.0 |
1.1.4 |
4.4.0 |
2.7.3 |
0.9.0 |
| 2.1.0.RELEASE or 2.0.0.RELEASE or 1.5.0.RELEASE |
1.6.3 |
1.1.1 |
4.4.0 |
2.7.3 |
0.7.1 |
版本依賴關系(推薦使用)
| Spring Cloud Version | Spring Cloud Alibaba Version | Spring Boot Version |
|---|---|---|
| Spring Cloud 2020.0 |
2020.0.RC1 |
2.4.2.RELEASE |
| Spring Cloud Hoxton.SR8 |
2.2.5.RELEASE |
2.3.2.RELEASE |
| Spring Cloud Greenwich.SR6 |
2.1.4.RELEASE |
2.1.13.RELEASE |
| Spring Cloud Hoxton.SR3 |
2.2.1.RELEASE |
2.2.5.RELEASE |
| Spring Cloud Hoxton.RELEASE |
2.2.0.RELEASE |
2.2.X.RELEASE |
| Spring Cloud Greenwich |
2.1.2.RELEASE |
2.1.X.RELEASE |
| Spring Cloud Finchley |
2.0.4.RELEASE |
2.0.X.RELEASE |
| Spring Cloud Edgware |
1.5.1.RELEASE(停止維護，建議升級) |
1.5.X.RELEASE |
spring-cloud-alibaba-dependencies版本關系對應，截圖如下：
（時間寶貴，分享不易，捐贈回饋，^_^）
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©Copyright 蕃薯耀 2021-03-25
https://www.cnblogs.com/fanshuyao/