sandynz opened a new issue #15467:
URL: https://github.com/apache/shardingsphere/issues/15467
## Feature Request
### Is your feature request related to a problem?
No
### Describe the feature you would like.
Currently, when scaling job failure occur, we could not find detailed error
message via DistSQL, check error log is required for now.
Improved solution:
Show detailed error message in DistSQL `show scaling status {jobId}`.
Current DistSQL columns:
```
mysql> show scaling status 744681486039655;
+------+-------------+----------+--------+-------------------------------+--------------------------+
| item | data_source | status | active | inventory_finished_percentage |
incremental_idle_minutes |
+------+-------------+----------+--------+-------------------------------+--------------------------+
```
A new column named `error` will be added at last.
This column should show error message or exception stack trace.
The error message should be persisted to regitry center, e.g. ZK.
Registry center node path: `/scaling/{jobId}/error/{shardingItem}`, similar
as `offset`.
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