BiteTheDDDDt opened a new pull request, #65102:
URL: https://github.com/apache/doris/pull/65102
### What problem does this PR solve?
Issue Number: None
Related PR: #64866
Problem Summary: Backport #64866 to branch-4.1. Local runtime filter merge
can deadlock because the old local merge context lock protected both the merger
and producer list, allowing lock inversion with producer/merger locks. This
backport snapshots the local merge context/producers under RuntimeFilterMgr
lock and performs merge, size, and debug work after releasing it.
### Release note
None
### Check List (For Author)
- Test: Unit Test
- ./run-be-ut.sh --run --filter=RuntimeFilterMgrTest.*
- ./run-be-ut.sh --run --filter=RuntimeFilterMergerTest.*
- git diff --check upstream/branch-4.1..HEAD
- Behavior changed: No
- Does this need documentation: No
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