chengshiwen opened a new pull request #4786:
URL: https://github.com/apache/incubator-dolphinscheduler/pull/4786
## What is the purpose of the pull request
*Fix wrong host of task instance in k8s*
This closes #3298
The last pr #4755 has cherry-picked all changes except for
`ChannelUtils.java`. This pr cherry-picks the change of `ChannelUtils.java`
from #4703
## Brief change log
- *Modify `ChannelUtils.java`*
## 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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