manojpec opened a new pull request #4259:
URL: https://github.com/apache/hudi/pull/4259
## What is the purpose of the pull request
Today Metadata table updates are done inline/synchronous with the data table
updates. Metadata data table updates can also sometime trigger table services
like compaction which are also done inline w.r.t the ongoing commit. So,
updates in the metadata table are always serial. However, there can be async
table services like clustering which are running in parallel with single or
multiple writers and can update the metadata table in parallel with the writer
commits.
In the multi writer case, since we anyway have the lock provider configured
metadata table updates are guarded for race. But, the lock providers are not
must today for single writer + async table service deployments, leading to race
in metadata table updates. Async table service like clustering can race with
the metadata table compaction, and can update the wrong delta log file than the
right next delta file from the compaction.
For the single writer + async table operations triggered from the same
process, a local JVM based lock provider implementation is needed.
## Brief change log
- Adding Local JVM process based lock provider implementation
- Enabling the metadata table by default
- This local lock provider can be used by a single writer process with async
table operations to guard the metadata tabl against concurrent updates.
## Verify this pull request
*(Please pick either of the following options)*
This pull request is a trivial rework / code cleanup without any test
coverage.
*(or)*
This pull request is already covered by existing tests, such as *(please
describe tests)*.
(or)
This change added tests and can be verified as follows:
*(example:)*
- *Added integration tests for end-to-end.*
- *Added HoodieClientWriteTest to verify the change.*
- *Manually verified the change by running a job locally.*
## Committer checklist
- [ ] Has a corresponding JIRA in PR title & commit
- [ ] Commit message is descriptive of the change
- [ ] CI is green
- [ ] Necessary doc changes done or have another open PR
- [ ] For large changes, please consider breaking it into sub-tasks under
an umbrella JIRA.
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