We recently saw some of these warnings in a cluster we were setting up. These warnings mean there are rows in the META table that are missing one of the expected columns. In our case, we verified that these regions didn't appear to exist in HDFS either and the table itself showed no holes or problems in hbck or via our application. After looking at the timestamps of the other data in these rows in META we determined that the remaining columns in META had been written on an earlier incarnation of a table with the same name. I.e. we created a table once, put data in it, deleted the table, created a new table of the same name, and apparently not everything was correctly deleted from META. I'm not sure how that happened, but to clean it up we manually removed those rows from META and didn't observe any more WARNings or problems afterward. There's another mailing list thread from some months back from someone with a similar issue and resolution. Good luck!
Dave On Sun, Feb 24, 2013 at 5:03 PM, Jean-Marc Spaggiari < [email protected]> wrote: > Hi, > > I'm wondering, how much should we worrie about those warnings: > WARN org.apache.hadoop.hbase.master.CatalogJanitor: REGIONINFO_QUALIFIER is > empty in keyvalues={ > > I have 6 of them show each time the CatalgoJanitor is running (5 minutes). > > Doesn't seems to really be an issue, but then why is it a WARN? > > Thanks, > > JM >
