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Date: Wed, 20 Jun 2012 12:05:20 +0100
From: Rory Franklin <rory@chillibean.tv>
To: user@couchdb.apache.org
Message-ID: <0A30A158CD7D43E7BAAFD2B93A6B7BB7@chillibean.tv>
Subject: CouchDB Lucene boost problem
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Hi,

We've got a machine with couchdb-lucene 0.9 on it and various machines that use 0.7 and there seems to be a discrepancy between the two versions.

In one of our indexes we are boosting a particular field so that it comes above others in search results (we are searching for an ID and linked ID's in other documents, but want the document that matches the ID directly to return above the linked documents), and the definition looks like this:

ret.add(doc.entry_human_id, {'field':'sort_entry_human_id', 'type' : 'int', 'boost' : 1.5})

On 0.7 this works absolutely fine, but on 0.9 we are seeing this error:

2012-06-20 10:48:04,251 WARN [lia_development] Exiting due to exception.
java.lang.UnsupportedOperationException: You cannot set an index-time boost: norms are omitted for field 'sort_entry_human_id'
        at org.apache.lucene.index.DocInverterPerField.processFields(DocInverterPerField.java:85)
        at org.apache.lucene.index.DocFieldProcessorPerThread.processDocument(DocFieldProcessorPerThread.java:276)
        at org.apache.lucene.index.DocumentsWriter.updateDocuments(DocumentsWriter.java:852)
        at org.apache.lucene.index.IndexWriter.updateDocuments(IndexWriter.java:2167)
        at com.github.rnewson.couchdb.lucene.DatabaseIndexer.handleResponse(DatabaseIndexer.java:393)
        at com.github.rnewson.couchdb.lucene.DatabaseIndexer.handleResponse(DatabaseIndexer.java:83)
        at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:735)
        at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:709)
        at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:700)
        at com.github.rnewson.couchdb.lucene.DatabaseIndexer.run(DatabaseIndexer.java:473)
        at java.lang.Thread.run(Thread.java:680)


Removing the boost and restarting couchdb-lucene resolves the issue, I'm just curious as to what the problem may be?


Thanks,
Rory

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