[ceph-users] rgw index shard much larger than others

Dear friends, Running 14.2.11, we have one particularly large bucket with a very strange distribution of objects among the shards. The bucket has 512 shards, and most shards have ~75k entries, but shard 0 has 1.75M entries: # rados -p default.rgw.buckets.index listomapkeys .dir.61c59385-085d-4caa-9070-63a3868dccb6.272652427.1.0 | wc -l 1752085 # rados -p default.rgw.buckets.index listomapkeys .dir.61c59385-085d-4caa-9070-63a3868dccb6.272652427.1.1 | wc -l 78388 # rados -p default.rgw.buckets.index listomapkeys .dir.61c59385-085d-4caa-9070-63a3868dccb6.272652427.1.2 | wc -l 78764 We had resharded this bucket (manually) from 32 up to 512 shards just before upgrading from 12.2.12 to 14.2.11 a couple weeks ago. Any idea why shard .0 is getting such an imbalance of entries? Should we manually reshard this bucket again? Thanks! Dan