branch-4.1: [fix](audit) serialize audit loader batch assembly #65107#65132
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### What problem does this PR solve? `AuditLoader.loadIfNecessary()` is synchronized and resets `auditLogBuffer` after stream load, but `assembleAudit()` appended events to the same shared `StringBuilder` without holding the same monitor. When `call flush_audit_log()` forces a load while the audit loader worker is assembling a new event, the worker may append to the old buffer after the payload has already been materialized for stream load and before `resetBatch()` replaces the buffer. That event is then neither included in the current load nor retained for the next load. This can make `flush_audit_log()` miss audit events that have already reached the audit plugin pipeline, which matches the flaky `test_audit_log_queue_time` symptom. Related: DORIS-25958 ### Check List - [x] Added test - [ ] This is a behavior change and it is documented - [ ] This is a new feature and it is documented - [ ] This needs upgrade - [ ] This needs downgrade ### Release note None ### Testing - `git diff --check` - Not run: `run-fe-ut.sh --run org.apache.doris.plugin.audit.AuditLoaderTest` because local `thirdparty/installed/bin/protoc` is missing, and `fe/AGENTS.md` requires stopping FE build/test in that case.
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run buildall |
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skip buildall |
yiguolei
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Jul 2, 2026
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PR approved by at least one committer and no changes requested. |
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Cherry-picked from #65107