Following on--is there a way that I can forcibly replicate these blocks, perhaps by rsyncing the underlying files to other datanodes? As you might imagine under-replicated data makes me very uneasy.
On Wed, Jan 8, 2014 at 12:00 PM, Cooper Bethea <co...@siftscience.com>wrote: > 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. >
