feiniaofeiafei opened a new pull request, #66258:
URL: https://github.com/apache/doris/pull/66258
### What problem does this PR solve?
Issue Number: None
Related PR: None
Problem Summary: A full external catalog refresh invalidates the
name-to-object cache and the ID-to-name mapping separately. A concurrent name
lookup can reload an object after object invalidation but before the reverse
mapping is cleared, leaving later ID-based metadata lookups unable to find an
existing table. In addition, a name-cache hit did not repair a missing reverse
mapping. Clear the reverse mapping before invalidating cached objects, and
restore the mapping whenever a name lookup hits an existing cached object.
ExternalRowCountCache remains unchanged and continues to use IDs only.
### Release note
Fix transient external table row-count lookup failures during catalog
metadata refresh.
### Check List (For Author)
- Test: Unit Test
- ./run-fe-ut.sh --run
org.apache.doris.datasource.MetaCacheTest,org.apache.doris.datasource.ExternalRowCountCacheTest,org.apache.doris.datasource.metacache.MetaCacheDeadlockTest
- mvn checkstyle:check -pl fe-core
- Behavior changed: Yes. Name-based external metadata cache hits repair
the ID-to-name mapping, and refresh preserves mappings rebuilt during
invalidation.
- Does this need documentation: No
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