w41ter opened a new pull request, #61132:
URL: https://github.com/apache/doris/pull/61132
This is a cherry-pick of #60738 to branch-4.0.
It only works for metadata_failure_recovery mode
Problem Summary:
When using metadata failure recovery mode, sometimes the journal logs need
to be truncated to a specific journal ID to recover from metadata corruption.
This PR adds a new parameter `--recovery_journal_id` to allow users to specify
the target journal ID, and all journals with IDs greater than this value will
be removed.
### How to use
When the Frontend (FE) metadata is corrupted and needs to be recovered,
follow these steps:
1. Stop the FE process
2. Start FE with both `--metadata_failure_recovery` and
`--recovery_journal_id` parameters:
```bash
./start_fe.sh --metadata_failure_recovery --recovery_journal_id <journal_id>
```
For example, to recover to journal ID 12345:
```bash
./start_fe.sh --metadata_failure_recovery --recovery_journal_id 12345
```
3. The system will:
- Remove all journal databases with IDs greater than the specified
journal ID
- Truncate the target journal database by deleting keys with IDs greater
than the specified value
- Start FE in metadata failure recovery mode
**Note**: This operation will permanently delete metadata journals. Make
sure to backup your data before using this feature.
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