zhuangchong opened a new pull request #4885:
URL: https://github.com/apache/incubator-dolphinscheduler/pull/4885
## What is the purpose of the pull request
this PR close #4884
Acitve ReSourceManager IP = null when obtaining Acitve ReSourceManager
address in YARN HA mode fails,the yarn application URL generation failed
exception should be thrown here
## Verify this pull request
This change added tests and can be verified as follows:
- *Manually verified the change by testing locally.*
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