Places where onStaleShardVersion is currently called:

• mongos_process_interface.cpp
• version_manager.cpp – no exception, but shard ID
• cluster_map_reduce.cpp – no exception, but shard ID
• cluster_merge_chunks_cmd.cpp – no exception, but shard ID
• cluster_split_cmd.cpp – no exception, but shard ID
• cluster_move_chunk_cmd.cpp – no exception, but shard ID
• cluster_split_cmd.cpp – no exception, but shard ID
• cluster_find.cpp – exception available
• chunk_manager_targeter.cpp – exception available, but need to pipe through to level of onStaleShardVersion

Places where invalidateShardedCollection is currently called that should be changed to onStaleShardVersion:

• strategy.cpp::runCommand – exception is available
• parallel.cpp – exception is available
• strategy.cpp::explainFind – exception is available

Places where invalidateShardedCollection is currently called that should be changed to onEpochChange:

• configsvr_drop_collection_command.cpp – we are changing the epoch
• cluster_drop_cmd.cpp – nothing available, but we're changing the epoch... hmm
• cluster_map_reduce.cpp – nothing, but we're changing the epoch
• cluster_shard_collection.cpp – nothing, but we're changing the epoch
• version_manager.cpp

Places where invalidateShardedCollection is currently called that should be changed to forceWaitOnRefresh:

• catalog_cache.cpp::getCollectionRoutingInfoWithRefresh
• catalog_cache.cpp::getShardedCollectionRoutingInfoWithRefresh