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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5013) disallow bloom filter false positive chance of 0
Date Fri, 04 Jan 2013 17:36:12 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5013?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13544050#comment-13544050
] 

Jonathan Ellis commented on CASSANDRA-5013:
-------------------------------------------

Not sure what you mean, isn't that what I'm doing here?

{code}
.       // we disallow bFFPC==null starting in 1.2.1 but tolerated it before that
        return (bloomFilterFpChance == null || bloomFilterFpChance == 0)
               ? compactionStrategyClass == LeveledCompactionStrategy.class ? 0.1 : 0.01
               : bloomFilterFpChance;
{code}
                
> disallow bloom filter false positive chance of 0
> ------------------------------------------------
>
>                 Key: CASSANDRA-5013
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5013
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Config
>            Reporter: Matthew F. Dennis
>            Assignee: Jonathan Ellis
>            Priority: Minor
>             Fix For: 1.2.1
>
>         Attachments: 5013.txt, 5013-v2.txt
>
>
> {pre}
> ERROR [CompactionExecutor:16] 2012-11-30 08:44:32,546 SSTableWriter.java (line 414) Bloom
filter FP chance of zero isn't supposed to happen
> {pre}
> when attempting to set it to zero, C* should either disallow the change or should just
interpret 0 as "make it the default" and not continually log the above error message

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