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https://issues.apache.org/jira/browse/CASSANDRA-348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12740881#action_12740881
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Hudson commented on CASSANDRA-348:
----------------------------------
Integrated in Cassandra #161 (See
[http://hudson.zones.apache.org/hudson/job/Cassandra/161/])
- switch from trying to get the next endpoint by increasing offset to
asking tokenMetadata for "the next
one." this will always be correct where the offset approach will not (usually
you want offset to just be 1,
but sometimes you have to keep increasing it if no results are found but the
range is still not finished)
- merge results differently when the endpoint responsible for where the ring
wraps is involved, since
that endpoint can hold keys from both the beginning and end of the range.
patch by jbellis; tested by Mark Robson for
> Range scan over two nodes returns wrong data
> --------------------------------------------
>
> Key: CASSANDRA-348
> URL: https://issues.apache.org/jira/browse/CASSANDRA-348
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 0.4
> Reporter: Mark Robson
> Assignee: Jonathan Ellis
> Attachments: 348-2-fixup-2.patch, 348-2-fixup.patch, 348-2.patch,
> 348.diff, LoadAndScan.py, setup.cas
>
>
> I've got two nodes with tokens 00000000 and 88888888. I add 16 rows in which
> are spread over them, then do a key range scan.
> I can scan part of the range successfully, but if I try to scan the entire
> range of keys (0-f) then I get unexpected results
> ./Cassandra-remote -h localhost:9160 get_key_range Keyspace1 Standard1 0 31
> 1000
> ['00', '01', '10', '11', '20', '21', '30', '31']
> ./Cassandra-remote -h localhost:9160 get_key_range Keyspace1 Standard1 3 81
> 1000
> ['30', '31', '40', '41', '50', '51', '60', '61', '70', '71', '80', '81']
> ./Cassandra-remote -h localhost:9160 get_key_range Keyspace1 Standard1 7 b1
> 1000
> ['70', '71', '80', '81', '90', '91', 'a0', 'a1', 'b0', 'b1']
> ./Cassandra-remote -h localhost:9160 get_key_range Keyspace1 Standard1 a g
> 1000
> ['a0', 'a1', 'b0', 'b1', 'c0', 'c1', 'd0', 'd1', 'e0', 'e1', 'f0', 'f1']
> All of which returned as I expected.
> But when I range scan the whole lot (0-g) then I get:
> ./Cassandra-remote -h localhost:9160 get_key_range Keyspace1 Standard1 0 g
> 1000
> [ '00',
> '90',
> '91',
> 'a0',
> 'a1',
> 'b0',
> 'b1',
> 'c0',
> 'c1',
> 'd0',
> 'd1',
> 'e0',
> 'e1',
> 'f0',
> 'f1']
> Where have 01-81 gone?
> I'll attach the data loading script.
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