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From "Toby Jungen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-1093) BinaryMemtable interface silently dropping data.
Date Fri, 28 May 2010 20:24:36 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1093?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12873139#action_12873139
] 

Toby Jungen commented on CASSANDRA-1093:
----------------------------------------

Looks like everything passed. You may want to re-run from start to finish one or two more
times (my error didn't occur consistently), but if it still passes at that point then close
this issue as WontFix and I'll attribute the problem to my hardware setup. As mentioned I've
found somewhat of a workaround. I'll gladly donate my test code as a possible unit test for
BMT if needed. :)

> BinaryMemtable interface silently dropping data.
> ------------------------------------------------
>
>                 Key: CASSANDRA-1093
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1093
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: Linux Centos5, Fedora Core 4. Java HotSpot Server 1.6.0_14. See
readme for more details.
>            Reporter: Toby Jungen
>            Assignee: Brandon Williams
>             Fix For: 0.6.3
>
>         Attachments: cassandra_bmt_test.tar.gz
>
>
> I've been attempting to use the Binary Memtable (BMT) interface to load a large number
of rows. During my testing, I discovered that on larger loads (~1 million rows), occasionally
some of the data never appears in the database. This happens in a non-deterministic manner,
as sometimes all the data loads fine, and other times a significant chunk goes missing. No
errors are ever logged to indicate a problem. I'm attaching some sample code that approximates
my application's usage of Cassandra and explains this bug in more detail.

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