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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3424) PhoneticFilterFactory threadsafety bug
Date Mon, 30 Apr 2012 15:39:48 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13264986#comment-13264986
] 

Uwe Schindler commented on SOLR-3424:
-------------------------------------

Thanks! Thaks for taking care, as I have no time to provide a patch at the moment :(

bq. but I will since it seems to be a big deal to you (three exclamation points)

:-) It's not so important, if it's private to the class! I just don't want public code to
expose Collections not intended to be modified in a modifiable way, so i am fine with or without
unmodifiable. There are also places in Lucene violating this (or use public arrays, which
cannot be protected - like CompositeReader.getSequentialSubReaders()).
                
> PhoneticFilterFactory threadsafety bug
> --------------------------------------
>
>                 Key: SOLR-3424
>                 URL: https://issues.apache.org/jira/browse/SOLR-3424
>             Project: Solr
>          Issue Type: Bug
>          Components: Schema and Analysis
>    Affects Versions: 3.6, 4.0
>            Reporter: David Smiley
>            Assignee: David Smiley
>            Priority: Minor
>             Fix For: 4.0
>
>         Attachments: SOLR-3424_PhoneticFilterFactory_threadsafety_bug.patch
>
>
> PhoneticFilterFactory has a static HashMap registry mapping an encoder name to an implementation.
There is a ReentrantLock used when the map is modified (when the encoder config specifies
a class name).  However, this map, which can be accessed by multiple indexing threads, isn't
guarded on any of the reads, which isn't just the common path but also the error messages
which dump the registry into the error message.
> I realize the likelihood of a problem is extremely slim, but a bug's a bug.

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