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POShared Compass/Lucene Index in JDBC Store
 

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    <p>Using the searchable plugin in Grails (which uses Compass/Lucene under the hood) we're trying to share a search index between two different web applications. One application accesses the data only in a read-only fashion. The other application allows to modify the data and is in charge of updating the index on any change or do a full re-index on demand.</p> <p>To store the index we're using the JDBC Store (with both applications pointing to the same DB) <a href="http://www.compass-project.org/docs/latest/reference/html/core-connection.html" rel="nofollow">http://www.compass-project.org/docs/latest/reference/html/core-connection.html</a>.</p> <p>Unfortunately, as soon as we rebuild the whole index in one application, the other application seems to have invalid data cached and an exception is thrown if a search is performed:</p> <pre><code>| Error 2012-05-30 09:22:07,560 [http-bio-8080-exec-8] ERROR errors.GrailsExceptionResolver - IndexOutOfBoundsException occurred when processing request: [POST] /search Index: 45, Size: 13. Stacktrace follows: Message: Index: 45, Size: 13 Line | Method -&gt;&gt; 547 | RangeCheck in java.util.ArrayList - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | 322 | get in '' | 265 | fieldInfo . in org.apache.lucene.index.FieldInfos | 254 | fieldName in '' | 86 | read . . . in org.apache.lucene.index.TermBuffer | 127 | next in org.apache.lucene.index.SegmentTermEnum | 158 | scanTo . . in '' | 271 | get in org.apache.lucene.index.TermInfosReader | 332 | terms . . . in '' | 717 | terms in org.apache.lucene.index.SegmentReader | 93 | generate . in org.apache.lucene.search.PrefixGenerator | 58 | getDocIdSet in org.apache.lucene.search.PrefixFilter | 116 | &lt;init&gt; . . in org.apache.lucene.search.ConstantScoreQuery$ConstantScorer | 81 | scorer in org.apache.lucene.search.ConstantScoreQuery$ConstantWeight | 230 | scorer . . in org.apache.lucene.search.BooleanQuery$BooleanWeight | 131 | search in org.apache.lucene.search.IndexSearcher | 112 | search . . in '' | 204 | search in org.apache.lucene.search.MultiSearcher | 113 | getMoreDocs in org.apache.lucene.search.Hits | 90 | &lt;init&gt; in '' | 61 | search . . in org.apache.lucene.search.Searcher | 146 | findByQuery in org.compass.core.lucene.engine.transaction.support.AbstractTransactionProcessor | 259 | doFind . . in org.compass.core.lucene.engine.transaction.readcommitted.ReadCommittedTransactionProcessor | 246 | find in org.compass.core.lucene.engine.transaction.support.AbstractConcurrentTransactionProcessor | 352 | find . . . in org.compass.core.lucene.engine.LuceneSearchEngine | 188 | hits in org.compass.core.lucene.engine.LuceneSearchEngineQuery | 199 | hits . . . in org.compass.core.impl.DefaultCompassQuery | 104 | doInCompass in grails.plugin.searchable.internal.compass.search.DefaultSearchMethod$SearchCompassCallback | 133 | execute . . in org.compass.core.CompassTemplate | 57 | doInCompass in grails.plugin.searchable.internal.compass.support.AbstractSearchableMethod | 66 | invoke . . in grails.plugin.searchable.internal.compass.search.DefaultSearchMethod | 37 | search in grails.plugin.searchable.SearchableService </code></pre> <p>We could communicate the fact that the index is rebuilt from one to the other application so that some clean-up could be performed.</p> <ul> <li>Did anybody have a similar problem with Grails and the Searchable plugin?</li> <li>Is it possible to discard data cached by Compass/Lucene?</li> <li>Is it possible to disable caching generally?</li> </ul>
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