Toby,
Can you tell us more about your setup? Numbers of machines, if NTP is
installed and running, number of regions in your table and other useful
stuff.
Thx,
J-D
On Mon, Oct 20, 2008 at 11:11 AM, Toby White
<[EMAIL PROTECTED]>wrote:
> I'm seeing a strange effect on my hbase instance. Sometimes, on requesting
> the full history of a column, I get back individual cells several times
> over.
>
> That is, I'm getting results like this:
>
> base(main):006:0* get 'my_table', 'scw9npU7Q4ma_khXqlDGXg', {COLUMN =>
> 'value:', VERSIONS=>4000}
> timestamp=1224504133000, value=1013.0
> timestamp=1224502749000, value=1012.0
> timestamp=1224502749000, value=1012.0
> timestamp=1224499880000, value=1011.0
> timestamp=1224499880000, value=1011.0
> timestamp=1224499880000, value=1011.0
> timestamp=1224415961000, value=1010.0
> timestamp=1224415961000, value=1010.0
> timestamp=1224415961000, value=1010.0
> timestamp=1224415701000, value=1009.0
> timestamp=1224415701000, value=1009.0
> timestamp=1224415701000, value=1009.0
> timestamp=1224414200000, value=1008.0
> timestamp=1224414200000, value=1008.0
> timestamp=1224414200000, value=1008.0
>
> This happens both through the hbase shell as shown here, and when
> communicating with the server via thrift.
>
> In either case, the cells are reported either as shown above; that is, with
> each cell simply repeated several times (in this case, 3) or sometimes with
> the series repeated; something like this:
>
> base(main):006:0* get 'golddigger', 'scw9npU7Q4ma_khXqlDGXg', {COLUMN =>
> 'value:', VERSIONS=>4000}
> timestamp=1224504133000, value=1013.0
> timestamp=1224502749000, value=1012.0
> timestamp=1224499880000, value=1011.0
> timestamp=1224415961000, value=1010.0
> timestamp=1224415701000, value=1009.0
> timestamp=1224414200000, value=1008.0
> timestamp=1224504133000, value=1013.0
> timestamp=1224502749000, value=1012.0
> timestamp=1224499880000, value=1011.0
> timestamp=1224415961000, value=1010.0
> timestamp=1224415701000, value=1009.0
> timestamp=1224414200000, value=1008.0
>
> or sometimes a combination of both ie an entire series, each cell repeated
> a couple of times, and then the whole lot repeated again.
>
> This doesn't happen with all rows, only some of them, apparently at random.
> Sometimes, restarting hbase & the underlying hdf makes the problem go away;
> sometimes, it doesn't, and the issue persists.
>
> This is with hbase 0.18.0 on hadoop 0.18.1
>
> Is this a known issue?
>
