yihua opened a new pull request, #8771:
URL: https://github.com/apache/hudi/pull/8771
### Change Logs
Before this PR, the user has to manually downgrade the metadata table from
version 5 to 4 (e.g., from 0.13.0 release to 0.11.1 release), when the metadata
table is enabled, along with the data table. Otherwise, if the data table is
downgraded from version 5 to 4 only, the following exception is thrown when
trying to write to the table using an old release (e.g., 0.11.1):
```
org.apache.hudi.exception.HoodieException: Unknown versionCode:5
at
org.apache.hudi.common.table.HoodieTableVersion.lambda$versionFromCode$1(HoodieTableVersion.java:58)
at java.util.Optional.orElseThrow(Optional.java:290)
at
org.apache.hudi.common.table.HoodieTableVersion.versionFromCode(HoodieTableVersion.java:58)
at
org.apache.hudi.common.table.HoodieTableConfig.getTableVersion(HoodieTableConfig.java:465)
at
org.apache.hudi.table.upgrade.UpgradeDowngrade.needsUpgradeOrDowngrade(UpgradeDowngrade.java:66)
at
org.apache.hudi.client.BaseHoodieWriteClient.tryUpgrade(BaseHoodieWriteClient.java:1554)
at
org.apache.hudi.client.BaseHoodieWriteClient.initTable(BaseHoodieWriteClient.java:1457)
at
org.apache.hudi.client.BaseHoodieWriteClient.initTable(BaseHoodieWriteClient.java:1490)
at
org.apache.hudi.client.SparkRDDWriteClient.upsertPreppedRecords(SparkRDDWriteClient.java:166)
at
org.apache.hudi.metadata.SparkHoodieBackedTableMetadataWriter.commit(SparkHoodieBackedTableMetadataWriter.java:166)
at
org.apache.hudi.metadata.HoodieBackedTableMetadataWriter.processAndCommit(HoodieBackedTableMetadataWriter.java:803)
at
org.apache.hudi.metadata.HoodieBackedTableMetadataWriter.update(HoodieBackedTableMetadataWriter.java:870)
at
org.apache.hudi.client.BaseHoodieWriteClient.lambda$writeTableMetadata$0(BaseHoodieWriteClient.java:334)
at org.apache.hudi.common.util.Option.ifPresent(Option.java:97)
at
org.apache.hudi.client.BaseHoodieWriteClient.writeTableMetadata(BaseHoodieWriteClient.java:334)
at
org.apache.hudi.client.BaseHoodieWriteClient.commit(BaseHoodieWriteClient.java:269)
at
org.apache.hudi.client.BaseHoodieWriteClient.commitStats(BaseHoodieWriteClient.java:234)
at
org.apache.hudi.client.SparkRDDWriteClient.commit(SparkRDDWriteClient.java:122)
at
org.apache.hudi.HoodieSparkSqlWriter$.commitAndPerformPostOperations(HoodieSparkSqlWriter.scala:651)
at
org.apache.hudi.HoodieSparkSqlWriter$.write(HoodieSparkSqlWriter.scala:315)
at org.apache.hudi.DefaultSource.createRelation(DefaultSource.scala:171)
```
### Impact
_Describe any public API or user-facing feature change or any performance
impact._
### Risk level (write none, low medium or high below)
_If medium or high, explain what verification was done to mitigate the
risks._
### Documentation Update
_Describe any necessary documentation update if there is any new feature,
config, or user-facing change_
- _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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