Pikady opened a new pull request, #9134:
URL: https://github.com/apache/gravitino/pull/9134
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### What changes were proposed in this pull request?
- Add argument validation in
MetadataObjectStatisticsOperations#dropStatistics to throw
IllegalArgumentException when the list is null or empty.
- Extend unit tests to assert null/empty list behavior.
### Why are the changes needed?
- Prevents potential NullPointerException and provides clearer error
feedback to callers.
Fix: #9122
### Does this PR introduce _any_ user-facing change?
- dropStatistics(null | empty) now throws IllegalArgumentException (null
input previously could cause NPE).
### How was this patch tested?
- Unit tests added for null and empty list inputs.
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