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https://issues.apache.org/jira/browse/SOLR-1366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12744993#action_12744993
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Andrzej Bialecki commented on SOLR-1366:
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Indeed, that complicates the matter ... It looks like using a non-file based
IndexReader breaks replication. This is not a regression from 1.3, but the
functionality to specify custom IndexReaders will be available in 1.4, so it
should be clearly stated in docs that it prevents replication from working
properly, until we rectify this issue.
> UnsupportedOperationException may be thrown when using custom IndexReader
> -------------------------------------------------------------------------
>
> Key: SOLR-1366
> URL: https://issues.apache.org/jira/browse/SOLR-1366
> Project: Solr
> Issue Type: Bug
> Components: search
> Affects Versions: 1.4
> Reporter: Andrzej Bialecki
> Assignee: Mark Miller
> Fix For: 1.4
>
> Attachments: searcher.patch
>
>
> If a custom IndexReaderFactory is specifiedd in solrconfig.xml, and
> IndexReader-s that it produces don't support IndexReader.directory() (such as
> is the case with ParallelReader or MultiReader) then an uncaught
> UnsupportedOperationException is thrown.
> This call is used only to retrieve the full path of the directory for
> informational purpose, so it shouldn't lead to a crash. Instead we could
> supply other available information about the reader (e.g. from its toString()
> method).
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