We have a large cluster on Quincy 17.2.3 with a bucket holding 8.9 million small (15~20 MiB) objects. All the objects were multipart uploads from scripts using `aws s3 cp` The data is static (write-once, read-many) with no manual deletions and no new writes for months. We recently found 3 objects in this bucket that cannot be retrieved. The symptom is exactly the same as https://tracker.ceph.com/issues/47866 and https://bugzilla.redhat.com/show_bug.cgi?id=1892644 which were fixed a long time ago. Any form of listing (`aws s3 ls`, radosgw-admin object stat, radoslist, http head request, etc) returns good data, but the objects cannot be retrieved and rados -p ls shows the object data is missing. Any suggestions on how to troubleshoot this further?