@cbfr  Before you decide whether the cluster has corrupt files can you check the replication factor? If it's set to 2 then that normal  The help option will give you a full list of sub commands $ hdfs fsck / ? fsck: can only operate on one path at a time '?' The list of sub command options $ fsck <path> [-list-corruptfileblocks | [-move | -delete | -openforwrite] [-files [-blocks [-locations | -racks | -replicaDetails | -upgradedomains]]]] [-includeSnapshots] [-showprogress] [-storagepolicies] [-maintenance] [-blockId <blk_Id>] start checking from this path -move move corrupted files to /lost+found -delete delete corrupted files -files print out files being checked -openforwrite print out files opened for write -includeSnapshots include snapshot data of a snapshottable directory -list-corruptfileblocks print out list of missing blocks and files they belong to -files -blocks print out block report -files -blocks -locations print out locations for every block -files -blocks -racks print out network topology for data-node locations -files -blocks -replicaDetails print out each replica details -files -blocks -upgradedomains print out upgrade domains for every block -storagepolicies print out storage policy summary for the blocks -maintenance print out maintenance state node details -showprogress show progress in output. Default is OFF (no progress) -blockId print out which file this blockId belongs to, locations (nodes, racks)   It would be good to first check for corrupt files and then run the delete    $ hdfs fsck / -list-corruptfileblocks Connecting to namenode via http://mackenzie.test.com:50070/fsck?ugi=hdfs&listcorruptfileblocks=1&path=%2F ---output-- The filesystem under path '/' has 0 CORRUPT files A simple demo here my replication factor is 1  see above screenshot when I create a new file in hdfs the default repélication factor is set to 1 $ hdfs dfs -touch /user/tester.txt Now to check the replication fact  see the number 1 before the group:user hdfs:hdfs $ hdfs dfs -ls /user/tester.txt -rw-r--r-- 1 hdfs hdfs 0 2020-10-18 10:21 /user/tester.txt   Hope that helps            ... View more