Fusion 5.x Index Pipeline Retries Require Explicit Idempotency Keys for Deduplication
Background Fusion 5.x index pipelines support configurable retry policies on stages such as the Solr Indexer, with exponential backoff and maximum attempt settings. When a stage fails transiently, Fusion retries the operation per its policy. Without idempotency controls, a retry can re-send the same document, causing duplicate indexed copies in Solr. Current