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https://issues.apache.org/jira/browse/SOLR-1563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12777792#action_12777792
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Hoss Man commented on SOLR-1563:
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In all of the stack traces listed above, the NPE seems to be orriginating from
an attempt to derefrence a string value that was returned by
Fieldable.stringValue higher up in the call stack.
Given the number of different code paths involved (some of which haven't
changed from Solr 1.3 to Solr 1.4) I can't help but think something changed
deep in lucene to cause null to be returned in cases where it wasn't returned
in older versions of Lucene. So far i haven't been able to figure out where.
> NPE's occur in various situations related to FIeldable.stringValue when
> upgrading from 1.3 to 1.4
> -------------------------------------------------------------------------------------------------
>
> Key: SOLR-1563
> URL: https://issues.apache.org/jira/browse/SOLR-1563
> Project: Solr
> Issue Type: Bug
> Affects Versions: 1.4
> Reporter: Hoss Man
> Priority: Critical
>
> Multiple reports of NPEs when using Solr 1.4 - so far these all seem to
> relate to getting a null returned by Fieldable.stringValue when it isn't
> expected or accounted for. Thread where this was initially discussed...
> http://old.nabble.com/NPE-when-trying-to-view-a-specific-document-via-Luke-to26330237.html
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