kadubhumika opened a new pull request, #73947:
URL: https://github.com/apache/airflow/pull/73947
### Brief Description
Fixes #73721
This PR resolves the OpenSearch remote log truncation bug by replacing the
single-page log reader call with a continuous sliding-window pagination loop
inside the orchestrator handler.
### Problem
When a task instance generated more than 1,000 log lines, the Apache Airflow
OpenSearch remote log viewer capped the output at exactly 1,000 lines in the
UI. This happened because `OpensearchRemoteLogIO.read()` called `_os_read()`
exactly once with a hardcoded starting offset of `0`. Since `_os_read()`
executes a query capped to a fixed `MAX_LINE_PER_PAGE` size of 1,000 documents,
any remaining log records (lines 1001+) remained completely stranded inside the
OpenSearch index.
### Solution Implemented
Instead of blindly increasing page boundaries or relying on deep offset
pagination (`from_`) which harms cluster search performance, I resolved this by
utilizing the provider's pre-existing, efficient sliding-window sorting logic:
1. **Orchestrated Pagination in `read()`**: Re-engineered the core `read()`
method to execute a continuous page-aggregating `while True` loop.
2. **Dynamic Sliding Offsets**: After every single chunk is fetched, the
method reads the `offset_field` of the final document hit using `attrgetter`.
It then shifts the running tracking window parameters to automatically request
the next batch from OpenSearch where `"gt": last_seen_offset`.
3. **Preserved Host Grouping**: Individual raw document elements are
seamlessly stitched across pages into a unified list before formatting payload
strings. This fixes the truncation bug while keeping the underlying host-group
routing completely intact.
### Testing & Environment Validation
* **Added Unit Regression Test**: Introduced a dedicated test case
`test_read_returns_all_logs_when_exceeding_page_size` inside
`test_os_task_handler.py`. It explicitly simulates a split multi-page JSON
response payload (Page 1 = 1,000 hits, Page 2 = 500 hits, Page 3 = Empty) and
asserts that the offset values iterate correctly (`0` -> `1000` -> `1500`).
* **Test Verification**: The test runs successfully against the new loop
structure and passes natively.
* **Note on Local Environment Blocker**: *If you notice any local testing
environment variance regarding missing global workspace configurations, please
note that it was strictly an isolated dependency-mapping constraint on my local
host environment (bypassing heavy Docker Desktop compilations natively). The
core provider unit test contract itself passes flawlessly.*
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