codope opened a new pull request, #13022:
URL: https://github.com/apache/hudi/pull/13022
### Change Logs
```
Caused by: java.lang.IllegalArgumentException: Following instants have
timestamps >= compactionInstant (20250322001638926001) Instants
:[[20250322001708777__commit__COMPLETED__20250322001719795]]
```
This is thrown just after downgrading the table back to version 6 and on new
ingestion, MDT compaction code snippet is triggered and throws this exception
while trying to schedule compaction in mdt.
This is aminly due to compaction suffix in table version 6 (or lower) that
messes the ordering after downgrade from lsm timeline to table version 6
timeline. Fix is to add an empty deltacommit in metadata table so that there is
an instant greater to pass the "timestamps >= compactionInstant" check.
### Impact
MDT comapction after downgrade should succeed.
### Risk level (write none, low medium or high below)
low
### Documentation Update
_Describe any necessary documentation update if there is any new feature,
config, or user-facing change. If not, put "none"._
- _The config description must be updated if new configs are added or the
default value of the configs are changed_
- _Any new feature or user-facing change requires updating the Hudi website.
Please create a Jira ticket, attach the
ticket number here and follow the
[instruction](https://hudi.apache.org/contribute/developer-setup#website) to
make
changes to the website._
### Contributor's checklist
- [ ] Read through [contributor's
guide](https://hudi.apache.org/contribute/how-to-contribute)
- [ ] Change Logs and Impact were stated clearly
- [ ] Adequate tests were added if applicable
- [ ] CI passed
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