Open-source engineering / Apache Polaris
Making Apache Polaris Configuration Automation Reliable
I contributed seven merged fixes to Apache Polaris’s Python CLI to detect failures and preserve configuration across export and reapply.
- My role
- Upstream contributor
- Surface
- Python / Setup CLI
- Delivered
- 7 merged PRs
- Merged
- July 24 – August 17, 2026
Why this matters
Apache Polaris helps data engines find and manage Apache Iceberg tables. Its setup CLI exports configuration to YAML and reapplies it to an environment.
That process could report success after failed operations or silently lose configuration. I fixed failure reporting, missing objects, and altered content while preserving existing input formats.
About Apache PolarisThe workflow
- Catalog configuration
- Export
- YAML file
- Apply
- Recreated configuration
What changed
Detect incomplete operations
- #5098 Fix setup apply failure exit status
Apply could report success after provisioning errors. I made it return failure while still attempting the remaining resources.
Merged
- #5155 Fix setup export failure status
Failed reads could produce incomplete configuration with a successful exit status. Export now returns failure and withholds partial YAML.
Merged
Preserve configuration structure
- #5147 Export nested namespaces in setup CLI
Exports missed nested namespaces and their policy definitions. I reused the existing namespace traversal to include them.
Merged
- #5216 Fix setup export policy name collisions
Same-named policies in different namespaces could overwrite each other in exports. I gave each policy an explicit name and namespace, preserving legacy input support.
Merged
Preserve content and metadata
- #5190 Fix setup policy content round trips
Apply encoded exported JSON policy strings twice, changing their content. It now preserves those strings while still accepting structured content from handwritten YAML.
Merged
- #5265 Preserve setup entity properties in exports
Exports dropped user-defined properties from principals and catalog roles. I preserved both and added an export-to-YAML-to-apply regression test.
Merged
- #5281 Preserve setup principal-role properties
Principal roles lost their properties during export. I added a property-preserving object format while retaining the existing name-only shorthand.
Merged
How I validated the fixes
I reused existing traversal and failure-tracking code, kept older configuration formats working, and updated the setup documentation.
The PR records document regression tests for export → YAML → apply, failed API calls, nested resources, duplicate names, and mixed input formats, plus unit, lint, and applicable build or integration checks. These are the upstream validation results.
The scope is supported setup configuration, not complete disaster recovery. Apply remains best effort; policy attachments are not exported.