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From "Henrik Wingerei (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-5597) ClassCastException occurs when importing CLOB-fields using SqlEntityProcessor and SortedMapBackedCache
Date Thu, 02 Jan 2014 08:45:50 GMT
Henrik Wingerei created SOLR-5597:
-------------------------------------

             Summary: 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


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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