By the way, I forgot the forum link: http://community.cloudera.com
> On Oct 12, 2016, at 10:10 AM, Huaxiang Sun <h...@cloudera.com> wrote:
> Hi Tim,
> I believe that it runs into an issue which is specific to cloudera release
> we fixed recently. For details, could you discuss it in cdh forum?
> Copy me(h...@cloudera.com <mailto:h...@cloudera.com>) in the forum so I can
> explain more there.
>> On Oct 12, 2016, at 8:13 AM, Ted Yu <yuzhih...@gmail.com
>> <mailto:yuzhih...@gmail.com>> wrote:
>> Have you looked at HBASE-16578 ?
>>> On Oct 12, 2016, at 8:02 AM, Tim Robertson <timrobertson...@gmail.com
>>> <mailto:timrobertson...@gmail.com>> wrote:
>>> Hi devs,
>>> [Had a quick chat with Lars G. about this and before opening a Jira I
>>> thought I'd raise it here first]
>>> We have just experienced data loss in HBase 1.0.0-cdh5.4.10.
>>> Before I dig into this further, I'd like to just ask if anyone has seen
>>> this before?
>>> The initial state was a table (tim_test) built with MOB support and a few
>>> 10's million rows and 10's billions of cells.
>>> I wanted to rename the table to get this into production and did so as
>>> snapshot 'tim_test', 'tim_test-snapshot'
>>> clone_snapshot 'tim_test-snapshot', 'prod_b_map'
>>> At this stage the application all looked good, and so I continued with:
>>> delete_snapshot 'tim_test-snapshot'
>>> disable 'tim_test'
>>> drop ‘tim_test’
>>> Then things went... awry and data just started dropping out in the app.
>>> Before long, all MOB data seemingly is gone.
>>> The references in the new table MOB folder appear to point to the source
>>> table (e.g.
>>> The RS logs full of ERROR like:
>>> 2016-10-12 15:19:14,640 ERROR org.apache.hadoop.hbase.regionserver.HStore:
>>> The mob file
>>> could not be found in the locations
>>> What I don't know is:
>>> 1) was this running a background task to copy the MOB data when the
>>> snapshot was cloned and I just deleted the source before the copy was
>>> - or
>>> 2) when running "snapshot and clone" it just references the source MOB
>>> data until a (?) change?
>>> 3) snapshot and clone just doesn't support MOB?
>>> Can anyone shed some light on this easily before I dig into it please?
>>> While this situation exists (at least in 1.0.0) might it be good to get
>>> info about data loss for MOB tables into the snapshot clone docs?