cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Sylvain Lebresne (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-7245) Out-of-Order keys with stress + CQL3
Date Thu, 29 May 2014 10:26:02 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14012260#comment-14012260
] 

Sylvain Lebresne commented on CASSANDRA-7245:
---------------------------------------------

Since it's time to go ahead with 2.1 RC1, and unless somewhat has a fix he is 100% confident
with now, can we commit Jason's copy changes above (or change the allocator) for now? We can
then take the time to fix this correctly without copy for 2.1.1 (or 2.1.0 final, I don't really
mind if we test properly).

> Out-of-Order keys with stress + CQL3
> ------------------------------------
>
>                 Key: CASSANDRA-7245
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7245
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Pavel Yaskevich
>            Assignee: T Jake Luciani
>             Fix For: 2.1 rc1
>
>         Attachments: 7245-v2.txt, 7245.txt
>
>
> We have been generating data (stress with CQL3 prepared) for CASSANDRA-4718 and found
following problem almost in every SSTable generated (~200 GB of data and 821 SSTables).
> We set up they keys to be 10 bytes in size (default) and population between 1 and 600000000.
> Once I ran 'sstablekeys' on the generated SSTable files I got following exceptions:
> _There is a problem with sorting of normal looking keys:_
> 30303039443538353645
> 30303039443745364242
> java.io.IOException: Key out of order! DecoratedKey(-217680888487824985, *30303039443745364242*)
> DecoratedKey(-1767746583617597213, *30303039443437454333*)
> 00000a30303033343933
> 37344400001388343933
> java.io.IOException: Key out of order! DecoratedKey(5440473860101999581, *37344400001388343933*)
> DecoratedKey(-7565486415339257200, *30303033344639443137*)
> 30303033354244363031
> 30303033354133423742
> java.io.IOException: Key out of order! DecoratedKey(2687072396429900180, *30303033354133423742*)
> DecoratedKey(-7838239767410066684, *30303033354145344534*)
> 30303034313442354137
> 30343136353633340000
> java.io.IOException: Key out of order! DecoratedKey(1516003874415400462, *30343136353633340000*)
> DecoratedKey(-9106177395653818217, *30303034313333444238*)
> 30303035373044373435
> 30303035373044334631
> java.io.IOException: Key out of order! DecoratedKey(-3645715702154616540, *30303035373044334631*)
> DecoratedKey(-4296696226469000945, *30303035373132364138*)
> _And completely different ones:_
> 30303041333745373543
> 7cd045c59a90d7587d8d
> java.io.IOException: Key out of order! DecoratedKey(-3595402345023230196, *7cd045c59a90d7587d8d*)
> DecoratedKey(-5146766422778260690, *30303041333943303232*)
> 30303033323144444144
> 30303033323346343932
> java.io.IOException: Key out of order! DecoratedKey(7071845511166615635, *30303033323346343932*)
> DecoratedKey(5233296131921119414, *53d83e00000012287e03*)
> 30303034314531374431
> 3806734b256c27e41ec2
> java.io.IOException: Key out of order! DecoratedKey(-7720474642702543193, *3806734b256c27e41ec2*)
> DecoratedKey(-8072288379146044663, *30303034314136413343*)
> _And sometimes there is no problem at all:_
> 30303033353144463637
> 0000002a31b3b31a1c2f
> 5d616dd38211ebb5d6ec
> 44423645000013880000
> 00001388138844463744
> 30303033353143394343
> It's worth to mention that we have got 22 timeout exceptions but number of out-of-order
keys is much larger than that.



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message