The ChunkManager is part of the infrastructure supporting the caches of filtering metadata and routing information: when new metadata is fetched, it executes a few checks to verify their consistency, raising a ConflictingOperationInProgress when any violation is detected.

Nevertheless, DDLs always modify the sharding catalog through transactions nowadays: if the ChunkManager retrieves an inconsistent state, it cannot be associated to an inflight DDL (and it is most likely the symptom of metadata being persistently corrupted).