Trying to dump whole database with mongodump using built-in backup role failed with following messages show no authorization to execute find  on system.sharding_ddl_coordinators colleciton. 

```

2022-06-22T13:41:37.990+0900    writing ea7a7132-6587-448c-839d-e4855bb1841e.bucket to /data/mongodb/backup/mongodb/ea7a7132-6587-448c-839d-e4855bb1841e/bucket.bson
2022-06-22T13:41:37.991+0900    done dumping 05da735c-dc40-43f5-b8d5-79eb8e18510c.customcode (0 documents)
2022-06-22T13:41:37.991+0900    done dumping ea7a7132-6587-448c-839d-e4855bb1841e.bucket (0 documents)
2022-06-22T13:41:37.992+0900    Failed: (Unauthorized) not authorized on config to execute command { find: "system.sharding_ddl_coordinators", filter: {}, lsid: { id: UUID("9e2cc5cb-e0e2-450b-97f5-8e0f06ddab53") }, $clusterTime: { clusterTime: Timestamp(1655872896, 1), signature:

{ hash: BinData(0, B20AB0F10B84A79601AA1567D7B76F8296D9A1F3), keyId: 7073770222653538305 }

}, $db: "config", $readPreference: { mode: "primaryPreferred" } }

```

According to TOOLS-2952, system.sharding_ddl_coordinators is not a collection should be skipped.

 

Workaround:

create a user-defined backup user has find privilege to system.sharding_ddl_coordinators.