caishunfeng opened a new issue #6641: URL: https://github.com/apache/dolphinscheduler/issues/6641
### Search before asking - [X] I had searched in the [issues](https://github.com/apache/dolphinscheduler/issues?q=is%3Aissue) and found no similar issues. ### What happened When master refresh the worker node, it may occur NPE when hearbeat is null. ``` [ERROR] 2021-10-29 20:21:45.977 org.apache.dolphinscheduler.server.master.dispatch.host.LowerWeightHostManager:[152] - [] RefreshResourceTask error java.lang.NullPointerException: null at org.apache.dolphinscheduler.common.utils.HeartBeat.decodeHeartBeat(HeartBeat.java:228) at org.apache.dolphinscheduler.server.master.dispatch.host.LowerWeightHostManager$RefreshResourceTask.getHostWeight(LowerWeightHostManager.java:157) at org.apache.dolphinscheduler.server.master.dispatch.host.LowerWeightHostManager$RefreshResourceTask.run(LowerWeightHostManager.java:141) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) ``` ### What you expected to happen No NPE Excetion. ### How to reproduce Restart the worker server. ### Anything else _No response_ ### Are you willing to submit PR? - [ ] Yes I am willing to submit a PR! ### Code of Conduct - [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
