during on_commit of raft state machine, create_shard/seal_shard will write/update the associated metablk for the shard, but there may be some cases HO will crash before metablk is completed. in that case, we need to replay the journal log in HS to recover shard info
during on_commit of raft state machine, create_shard/seal_shard will write/update the associated metablk for the shard, but there may be some cases HO will crash before metablk is completed. in that case, we need to replay the journal log in HS to recover shard info