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From "Mark Harwood (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3950) Attempting postings="BloomFilter" results in UnsupportedOperationException
Date Tue, 16 Oct 2012 14:33:03 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13477036#comment-13477036
] 

Mark Harwood commented on SOLR-3950:
------------------------------------

bq. If there is some schema config that will tell Solr to do the right thing, please let me
know.

Right now BloomPF is like an abstract class - you need to fill-in-the-blanks as to what delegate
it will use before you can use it at write-time.
I think we have 3 options:

1) Solr (or you) provide a new PF impl that weds BloomPF with a choice of PF e.g. Lucene40PF
so you would have a zero-arg-constructor class named something like BloomLucene40PF or...
2) Solr extends config file format to provide a generic means of assembling "wrapper" PFs
like Bloom in their config e.g:
   postingsFormat="BloomFilter" delegatePostingsFormat="FooPF" 
   and Solr then does reflection magic to call constructors appropriately or..
3) Core Lucene is changed so that BloomPF is wedded to a default PF (e.g. Lucene40PF) if users
e.g. Solr fail to nominate a choice of delegate for BloomPF.

Of these 1) feels like "the right thing".

Cheers
Mark
                
> Attempting postings="BloomFilter" results in UnsupportedOperationException
> --------------------------------------------------------------------------
>
>                 Key: SOLR-3950
>                 URL: https://issues.apache.org/jira/browse/SOLR-3950
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: 4.1
>         Environment: Linux bigindy5 2.6.32-279.9.1.el6.centos.plus.x86_64 #1 SMP Wed
Sep 26 03:52:55 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
> [root@bigindy5 ~]# java -version
> java version "1.7.0_07"
> Java(TM) SE Runtime Environment (build 1.7.0_07-b10)
> Java HotSpot(TM) 64-Bit Server VM (build 23.3-b01, mixed mode)
>            Reporter: Shawn Heisey
>             Fix For: 4.1
>
>
> Tested on branch_4x, checked out after BlockPostingsFormat was made the default by LUCENE-4446.
> I used 'ant generate-maven-artifacts' to create the lucene-codecs jar, and copied it
into my sharedLib directory.  When I subsequently tried postings="BloomFilter" I got a the
following exception in the log:
> {code}
> Oct 15, 2012 11:14:02 AM org.apache.solr.common.SolrException log
> SEVERE: java.lang.UnsupportedOperationException: Error - org.apache.lucene.codecs.bloom.BloomFilteringPostingsFormat
has been constructed without a choice of PostingsFormat
> {code}

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