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https://issues.apache.org/jira/browse/SOLR-5597?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexandre Rafalovitch resolved SOLR-5597.
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Resolution: Won't Fix
> ClassCastException occurs when importing CLOB-fields using SqlEntityProcessor
> and SortedMapBackedCache
> ------------------------------------------------------------------------------------------------------
>
> Key: SOLR-5597
> URL: https://issues.apache.org/jira/browse/SOLR-5597
> Project: Solr
> Issue Type: Bug
> Components: contrib - DataImportHandler
> Affects Versions: 4.6
> Reporter: Henrik Wingerei
> Priority: Major
>
> Using the SqlEntityProcessor with the SortedMapBackedCache as cache
> implementation, gives the following ClassCastException when trying to import
> a field of type oracle.sql.CLOB.
> 2014-01-02 09:32:19,143 [ERROR] [Thread-54] Exception in entity :
> <field-name>:java.lang.ClassCastException: oracle.sql.CLOB cannot be cast to
> java.lang.Comparable
> at java.util.TreeMap.getEntry(TreeMap.java:325)
> at java.util.TreeMap.get(TreeMap.java:255)
> at
> org.apache.solr.handler.dataimport.SortedMapBackedCache.add(SortedMapBackedCache.java:61)
> at
> org.apache.solr.handler.dataimport.DIHCacheSupport.populateCache(DIHCacheSupport.java:124)
> at
> org.apache.solr.handler.dataimport.DIHCacheSupport.getSimpleCacheData(DIHCacheSupport.java:199)
> at
> org.apache.solr.handler.dataimport.DIHCacheSupport.getCacheData(DIHCacheSupport.java:147)
> at
> org.apache.solr.handler.dataimport.EntityProcessorBase.getNext(EntityProcessorBase.java:129)
> at
> org.apache.solr.handler.dataimport.SqlEntityProcessor.nextRow(SqlEntityProcessor.java:75)
> at
> org.apache.solr.handler.dataimport.EntityProcessorWrapper.nextRow(EntityProcessorWrapper.java:243)
> at
> org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:469)
> at
> org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:495)
> at
> org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:408)
> at
> org.apache.solr.handler.dataimport.DocBuilder.doFullDump(DocBuilder.java:323)
> at
> org.apache.solr.handler.dataimport.DocBuilder.execute(DocBuilder.java:231)
> at
> org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:411)
> at
> org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:476)
> at
> org.apache.solr.handler.dataimport.DataImporter$1.run(DataImporter.java:457)
> -- org.apache.solr.handler.dataimport.EntityProcessorWrapper
> It seems that this occurs because the SortedMapBackedCache uses a
> java.util.TreeMap as the underlying cache, and TreeMap requires that all
> elements implements the java.lang.Comparable interface. However
> oracle.sql.CLOB does not implement Comparable and the import fails when the
> TreeMap implementation tries to cast the element to a Comparable (this occurs
> on line 325 in TreeMap.java - java version 1.6.0_33).
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