Hi HDFS developers, I have a worrying problem in a 2.0.0-cdh4.4.0 HDFS cluster I am running. 9 blocks in the cluster are persistently reported to be under-replicated per "hdfs fsck".
I am able to fetch the files that contain these blocks, so I know that the data is there, but for some reason replication is not taking effect. In hopes of getting the cluster to notice that there were under-replicated blocks I tried using "hdfs dfs -setrep" to raise the replication factor, but the cluster continues to report a single replica for each of these blocks. When viewing master logs I see that the replication factor change is respected, but there are no messages that refer to the under-replicated blocks. Thanks for your time. Please let me know what I can do to investigate further.
