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https://issues.apache.org/jira/browse/SOLR-14516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17157392#comment-17157392
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David Smiley commented on SOLR-14516:
-------------------------------------

I love that this change was simple enough that it didn't actually involve 
changes to RTG or other inner complex beasts.  It seems that there is/was a 
gotcha on 
\{{org.apache.solr.schema.FieldType#write(org.apache.solr.response.TextResponseWriter,
 java.lang.String, org.apache.lucene.index.IndexableField)}} such that 
implementer/FieldType should be really careful about using 'f' – that it should 
most likely call toExternal on it.  
Can you please add javadocs to this write method about this so plugin authors 
have a hope of doing this correctly?

> NPE during Realtime GET
> -----------------------
>
>                 Key: SOLR-14516
>                 URL: https://issues.apache.org/jira/browse/SOLR-14516
>             Project: Solr
>          Issue Type: Bug
>            Reporter: Noble Paul
>            Assignee: Noble Paul
>            Priority: Major
>         Attachments: SOLR-14516.patch, SOLR-14516.patch
>
>
> The exact reason is unknown. But the following is the stacktrace
>  
>  o.a.s.s.HttpSolrCall null:java.lang.NullPointerException\n\tat 
> org.apache.solr.common.util.JsonTextWriter.writeStr(JsonTextWriter.java:83)\n\tat
>  org.apache.solr.schema.StrField.write(StrField.java:101)\n\tat 
> org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:124)\n\tat
>  
> org.apache.solr.response.JSONWriter.writeSolrDocument(JSONWriter.java:106)\n\tat
>  
> org.apache.solr.response.TextResponseWriter.writeSolrDocumentList(TextResponseWriter.java:170)\n\tat
>  
> org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:147)\n\tat
>  
> org.apache.solr.common.util.JsonTextWriter.writeNamedListAsMapWithDups(JsonTextWriter.java:386)\n\tat
>  
> org.apache.solr.common.util.JsonTextWriter.writeNamedList(JsonTextWriter.java:292)\n\tat



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