Eights-Li opened a new pull request #4042:
URL: https://github.com/apache/incubator-dolphinscheduler/pull/4042
## What is the purpose of the pull request
*fix #3900 kill multi yarn app in one job*
## Brief change log
- *modify server/utils/ProcessUtils.java **cancelApplication** method*
## Verify this pull request
- *server/utils/ProcessUtilsTest to verify this pr*
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