question1：Why are indicators suddenly like this？
java code ex：Exception message failed to refresh index: user_rank_total
question2：Why is the sharding uneven? node3 is not sharded
It is not clear to me what you are looking for. Please provide more information about the cluster, e.g. version used, configuration, data, indices and shards etc. Please also provide more context around the graphs you have provided and what the perceived issue is.