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Posted to commits@cassandra.apache.org by "Byron Clark (Commented) (JIRA)" <ji...@apache.org> on 2011/10/19 04:48:10 UTC
[jira] [Commented] (CASSANDRA-3303) Short reads protection results
in returning more columns than asked for
[ https://issues.apache.org/jira/browse/CASSANDRA-3303?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13130325#comment-13130325 ]
Byron Clark commented on CASSANDRA-3303:
----------------------------------------
[^long_read.sh] is the script I'm using with ccm to reproduce the issue.
> Short reads protection results in returning more columns than asked for
> -----------------------------------------------------------------------
>
> Key: CASSANDRA-3303
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3303
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.0.0
> Reporter: Sylvain Lebresne
> Assignee: Byron Clark
> Priority: Minor
> Fix For: 1.0.1
>
> Attachments: long_read.sh
>
>
> When we detect a short read (in SP.fetchRows), we retry a new command created by:
> {noformat}
> logger.debug("detected short read: expected {} columns, but only resolved {} columns", sliceCommand.count, liveColumnsInRow);
> int retryCount = sliceCommand.count + sliceCommand.count - liveColumnsInRow;
> SliceFromReadCommand retryCommand = new SliceFromReadCommand(command.table,
> command.key,
> command.queryPath,
> sliceCommand.start,
> sliceCommand.finish,
> sliceCommand.reversed,
> retryCount);
> {noformat}
> That is, in that new command, the count is greater than what asked in the initial command. But we never cut back the result of that new retried query.
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