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From "Tyler Hobbs (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-7120) Bad paging state returned for prepared statements for last page
Date Tue, 13 May 2014 18:52:19 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13996768#comment-13996768
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Tyler Hobbs commented on CASSANDRA-7120:
----------------------------------------

[~rhatch] yes, this reproduces 100% of the time.  You could make a version of the {{test_paging()}}
method here: https://github.com/datastax/python-driver/blob/master/tests/integration/standard/test_query_paging.py#L48

> Bad paging state returned for prepared statements for last page
> ---------------------------------------------------------------
>
>                 Key: CASSANDRA-7120
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7120
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Tyler Hobbs
>             Fix For: 2.1 rc1
>
>
> When executing a paged query with a prepared statement, a non-null paging state is sometimes
being returned for the final page, causing an endless paging loop.
> Specifically, this is the schema being used:
> {noformat}
>     CREATE KEYSPACE test3rf WITH replication = {'class': 'SimpleStrategy', 'replication_factor':
'3'}';
>     USE test3rf;
>     CREATE TABLE test3rf.test (
>                 k int PRIMARY KEY,
>                 v int
>     )
> {noformat}
> The inserts are like so:
> {noformat}
> INSERT INTO test3rf.test (k, v) VALUES (?, 0)
> {noformat}
> With values from [0, 99] used for k.
> The query is {{SELECT * FROM test3rf.test}} with a fetch size of 3.
> The final page returns the row with k=3, and the paging state is {{0004000000420004000176007fffffa2}}.
 This matches the paging state from three pages earlier.  When executing this with a non-prepared
statement, no paging state is returned for this page.
> This problem doesn't happen with the 2.0 branch.



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