Yeah increments won't work. I guess the warning isn't really visible but one place you can see it is:
$ ./bin/hadoop jar ../hbase/hbase.jar An example program must be given as the first argument. Valid program names are: CellCounter: Count cells in HBase table completebulkload: Complete a bulk data load. copytable: Export a table from local cluster to peer cluster export: Write table data to HDFS. import: Import data written by Export. importtsv: Import data in TSV format. rowcounter: Count rows in HBase table vvvv verifyrep: Compare the data from tables in two different clusters. WARNING: It doesn't work for incrementColumnValues'd cells since the timestamp is changed after being appended to the log. ^^^^ The problem is that increments' timestamps are different in the WAL and in the final KV that's stored in HBase. J-D On Thu, Jul 11, 2013 at 12:19 PM, Patrick Schless <patrick.schl...@gmail.com> wrote: > It's possible, but I'm not sure. This is a live system, and we do use > increment, and it's a smaller portion of our writes into HBase. I can try > to duplicate it, but I can't say how these specific cells got written. > > Would incremented cells not get replicated correctly? > > > On Thu, Jul 11, 2013 at 12:53 PM, Jean-Daniel Cryans > <jdcry...@apache.org>wrote: > >> Are those incremented cells? >> >> J-D >> >> On Thu, Jul 11, 2013 at 10:23 AM, Patrick Schless >> <patrick.schl...@gmail.com> wrote: >> > I have had replication running for about a week now, and have had a lot >> of >> > data flowing to our slave cluster over that time. Now, I'm running the >> > verifyrep MR job over a 1-hour period a couple days ago (which should be >> > fully replicated), and I'm seeing a small number of "BADROWS". >> > Spot-checking a few of them, the issue seems to be that the rows are >> > present, and have the same values, but a single cell in the row will be >> off >> > by 1ms. >> > >> > For instance, the log reports this error: >> > java.lang.Exception: This result was different: >> > >> keyvalues={01e581745c6a43aba01adf105af4e4a92013071015/data:!\xDF\xE0\x01/1373470622986/Put/vlen=8, >> > >> 01e581745c6a43aba01adf105af4e4a92013071015/data:&s\xC0\x01/1373470923084/Put/vlen=8, >> > >> 01e581745c6a43aba01adf105af4e4a92013071015/data:+\x07\xA0\x01/1373471223717/Put/vlen=8, >> > >> 01e581745c6a43aba01adf105af4e4a92013071015/data:/\x9B\x80\x01/1373471523316/Put/vlen=8, >> > >> 01e581745c6a43aba01adf105af4e4a92013071015/data:4/`\x01/1373471822913/Put/vlen=8} >> > compared to >> > >> keyvalues={01e581745c6a43aba01adf105af4e4a92013071015/data:!\xDF\xE0\x01/1373470622986/Put/vlen=8, >> > >> 01e581745c6a43aba01adf105af4e4a92013071015/data:&s\xC0\x01/1373470923084/Put/vlen=8, >> > >> 01e581745c6a43aba01adf105af4e4a92013071015/data:+\x07\xA0\x01/1373471223716/Put/vlen=8, >> > >> 01e581745c6a43aba01adf105af4e4a92013071015/data:/\x9B\x80\x01/1373471523316/Put/vlen=8, >> > >> 01e581745c6a43aba01adf105af4e4a92013071015/data:4/`\x01/1373471822913/Put/vlen=8} >> > >> > Some diffing reduces the issue down to: >> > >> 01e581745c6a43aba01adf105af4e4a92013071015/data:+\x07\xA0\x01/1373471223717/Put/vlen=8 >> > compared to >> > >> 01e581745c6a43aba01adf105af4e4a92013071015/data:+\x07\xA0\x01/1373471223716/Put/vlen=8. >> > >> > I'm assuming that the value before "/Put" is the cell's timestamp, which >> > means that the copies are off by 1ms. >> > >> > Any idea what could cause this? So far (the job is still running), the >> > problem seems rare (about 0.05% of rows). >> > >> > Thanks, >> > Patrick >>