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Posted to dev@hbase.apache.org by "Izaak Rubin (JIRA)" <ji...@apache.org> on 2008/07/10 20:10:31 UTC
[jira] Issue Comment Edited: (HBASE-737) Scanner: every cell in a
row has the same timestamp
[ https://issues.apache.org/jira/browse/HBASE-737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12612598#action_12612598 ]
irubin edited comment on HBASE-737 at 7/10/08 11:08 AM:
-------------------------------------------------------------
I'm pretty sure it's a Java issue. I added a debug line to HTable to print out what the scanner returns on a call to next(). Here's the result:
{code}
08/07/10 11:03:22 DEBUG client.HTable$ClientScanner: IZAAK: Scanner output on next is: row=row2, cells={(column=fam1:letters, timestamp=1215711498969, value=[B@1f86b7), (column=fam1:numbers, timestamp=1215711498969, value=[B@c57009), (column=fam2:letters, timestamp=1215711498969, value=[B@3e6b10)}
row2 column=fam1:letters, timestamp=1215711498969, value=def
row2 column=fam1:numbers, timestamp=1215711498969, value=123
row2 column=fam2:letters, timestamp=1215711498969, value=abc
{code}
(scroll over, they all have the same timestamp.)
was (Author: irubin):
I'm pretty sure it's a Java issue. I added a debug line to HTable to print out what the scanner returns on a call to next(). Here's the result:
{code}
08/07/10 11:03:22 DEBUG client.HTable$ClientScanner: IZAAK: Scanner output on next is: row=row2, cells={(column=fam1:letters, timestamp=1215711498969, value=[B@1f86b7), (column=fam1:numbers, timestamp=1215711498969, value=[B@c57009), (column=fam2:letters, timestamp=1215711498969, value=[B@3e6b10)}
row2 column=fam1:letters, timestamp=1215711498969, value=def
row2 column=fam1:numbers, timestamp=1215711498969, value=123
row2 column=fam2:letters, timestamp=1215711498969, value=abc
{code}
> Scanner: every cell in a row has the same timestamp
> ---------------------------------------------------
>
> Key: HBASE-737
> URL: https://issues.apache.org/jira/browse/HBASE-737
> Project: Hadoop HBase
> Issue Type: Bug
> Components: client
> Affects Versions: 0.2.0
> Reporter: Izaak Rubin
> Priority: Minor
>
> A row can have multiple cells, and each cell can have a different timestamp. The get command in the shell demonstrates that cells are being stored with different timestamps:
> {code}
> hbase(main):008:0> get 'table1', 'row2'
> COLUMN CELL
> fam1:letters timestamp=1215707612949, value=def
> fam1:numbers timestamp=1215707629064, value=123
> fam2:letters timestamp=1215711498969, value=abc
> 3 row(s) in 0.0100 seconds
> {code}
> However, using the scanners to retrieve these cells shows that they all have the same timestamp:
> {code}
> hbase(main):009:0> scan 'table1'
> ROW COLUMN+CELL
> row2 column=fam1:letters, timestamp=1215711498969, value=def
> row2 column=fam1:numbers, timestamp=1215711498969, value=123
> row2 column=fam2:letters, timestamp=1215711498969, value=abc
> 3 row(s) in 0.0600 seconds
> {code}
> The scanners are losing timestamp information somewhere along the line.
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