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Posted to commits@cassandra.apache.org by "bjc (JIRA)" <ji...@apache.org> on 2010/02/09 09:17:27 UTC
[jira] Commented: (CASSANDRA-781) in a cluster, get_range_slice()
does not return all the keys it should
[ https://issues.apache.org/jira/browse/CASSANDRA-781?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12831346#action_12831346 ]
bjc commented on CASSANDRA-781:
-------------------------------
Before applying 781.txt to trunk I was getting an exception. The exception is now gone! Awesome. However, I still have the range scanning problem. Here are a few example runs of the test:
$ python test_bug.py get_range_slice
ebbde791748641be951802d64d48c62d not marked 0
9bfa7ad8abce48a9a45daccfa3772f29 not marked 0
$ python test_bug.py get_range_slice
c554dc532bfb462b950990b6824f11c1 not marked 0
e6c4a0100508451ea3a1d13088877dd9 not marked 0
$ python test_bug.py get_range_slice
$ python test_bug.py get_range_slice
$ python test_bug.py get_range_slice
27fc88c8e7ab489d96f4c749cc86aca1 not marked 0
$ python test_bug.py get_range_slice
b522cca4bd6f4282a507525598139f95 not marked 0
$ python test_bug.py get_range_slice
d045b3edabc949fea30242722a11587a not marked 0
$
Sigh, I just realized that under trunk my nodetool doesn't work. However, I got the tokens from the log:
INFO 08:10:50,338 Saved Token not found. Using 68054825649105441942293089893012253843
INFO 08:10:53,293 Saved Token not found. Using 44181284974408316254372647768836513112
> in a cluster, get_range_slice() does not return all the keys it should
> ----------------------------------------------------------------------
>
> Key: CASSANDRA-781
> URL: https://issues.apache.org/jira/browse/CASSANDRA-781
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 0.5
> Environment: Debian 5 lenny on EC2, Gentoo linux, Windows XP
> Reporter: bjc
> Assignee: Jonathan Ellis
> Fix For: 0.5, 0.6
>
> Attachments: 781.txt
>
>
> get_range_slice() does not return the same set of keys as get_key_range() in 0.5.0 final.
> I posted a program to reproduce the behavior:
> http://www.mail-archive.com/cassandra-dev@incubator.apache.org/msg01474.html
> Apparently, you must have more than one node to get the behavior. Also, it may depend on the locations of the nodes on the ring.. I.e., if you don't generate enough keys randomly, then by chance they could all fall on the same host and you might not see the behavior, although I was able to get it to happen using only 2 nodes and 10 keys.
> Here are the other emails describing the issue:
> http://www.mail-archive.com/cassandra-user@incubator.apache.org/msg02423.html
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