[9.3] [Transform] Fix transform producing empty dest index when source query references runtime fields (#142450)#142829
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elasticsearchmachine merged 2 commits intoelastic:9.3from Feb 23, 2026
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…y references runtime fields (elastic#142450) When a transform's source query references a runtime field (e.g., a range filter on a runtime-mapped field), the destination index is produced empty even though _transform/_preview returns correct results. The root cause is that ClientTransformIndexer.injectPointInTimeIfNeeded() passes the source query as the PIT indexFilter, but OpenPointInTimeRequest does not support runtime_mappings. During the can_match phase, the query on the unknown runtime field is rewritten to match_none, all shards are filtered out, and the PIT opens with zero search contexts — causing every subsequent search to return empty results. Preview is unaffected because it uses a normal SearchSourceBuilder with both the query and runtime_mappings and does not use PIT. This change skips the PIT index filter optimization when the source config has non-empty runtime_mappings, since the filter cannot resolve runtime fields. The PIT is still opened for snapshot consistency, just without shard pre-filtering. Additionally, two other code paths that use the source query without propagating runtime_mappings are fixed: the initial progress search in TransformIndexer and the sourceHasChanged check in TimeBasedCheckpointProvider. All three fixes follow the same principle — wherever the source query is used, runtime_mappings from the source config must be propagated alongside it. Fixes elastic#113156 (cherry picked from commit cf28432) # Conflicts: # x-pack/plugin/transform/src/test/java/org/elasticsearch/xpack/transform/transforms/ClientTransformIndexerTests.java
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Update SourceConfig constructor calls to match new signature (removed 4th parameter) and remove CrossProjectModeDecider from TransformServices constructor. Co-authored-by: Cursor <cursoragent@cursor.com>
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