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From "Jonathan Ellis (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-5013) disallow bloom filter false positive chance of 0
Date Fri, 07 Dec 2012 16:45:23 GMT


Jonathan Ellis commented on CASSANDRA-5013:

Where are we converting zero to default?  ISTM that setting to zero is likely to either mean

# user is asking for no false positives at all, which is impossible.  should give an error
instead of changing to default.
# user is asking for no bloom filter at all, in which changing to default is also not what
we want to do.
> disallow bloom filter false positive chance of 0
> ------------------------------------------------
>                 Key: CASSANDRA-5013
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Config
>            Reporter: Matthew F. Dennis
>            Assignee: Brandon Williams
>            Priority: Minor
>             Fix For: 1.1.8
>         Attachments: 5013.txt
> {pre}
> ERROR [CompactionExecutor:16] 2012-11-30 08:44:32,546 (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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