[jira] Updated: (CASSANDRA-884) get_range_slice returns multiple copies of each row

["Omer van der Horst Jansen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Omer van der Horst Jansen updated CASSANDRA-884:
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    Attachment: TestApp2.java

The attached Java program demonstrates that multiple copies of rows are returned by get_range_slice. At least it does here :-)

> get_range_slice returns multiple copies of each row
> ---------------------------------------------------
>
>                 Key: CASSANDRA-884
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-884
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.5, 0.6
>         Environment: 4-cluster Gentoo Linux 2.6.18 with a ReplicationFactor of 2
>            Reporter: Omer van der Horst Jansen
>         Attachments: TestApp2.java
>
>
> I've noticed that both 0.5.1 and 0.6b2 return multiple identical copies of the data stored in my keyspace whenever I make a call to get_range_slice or get_range_slices using
> ConsistencyLevel.QUORUM and ReplicationFactor is greater than one.
> So with ReplicationFactor set to 2 for my application's KeySpace I get double the number of KeySlices that I expect to get. When using ConsistencyLevel.ONE I get only one KeySlice for each row.
> I've seen this happen with Cassandra 0.5.1 and with 0.6 beta 2. The behavior on 0.6 beta 2 is exhibited with both get_range_slice and get_range_slices.
> The attached Java program demonstrates the issue for 0.6 beta 2. The program writes a series of single-column rows into the Standard1 table, and then uses get_range_slice to receive a list of all row. The returned number of rows is consistently twice the number of rows written to the database. I wipe out the database completely before running the test.

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