Ceph » rgw

when use java sdk

ListObjectsRequest request = new ListObjectsRequest();
        request.setBucketName(bucketName);
        request.setDelimiter(" ");
        oNum = conn.listObjects(request).getObjectSummaries().size();
        for (int i = 0;i<oNum;i++){
            System.out.println(conn.listObjects(request).getObjectSummaries().get(i).getKey());
        }

it will cause 403 signature not match error