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Posted to issues@lucene.apache.org by "Alexandre Rafalovitch (Jira)" <ji...@apache.org> on 2020/08/29 20:27:00 UTC
[jira] [Resolved] (SOLR-5597) ClassCastException occurs when
importing CLOB-fields using SqlEntityProcessor and SortedMapBackedCache
[ https://issues.apache.org/jira/browse/SOLR-5597?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alexandre Rafalovitch resolved SOLR-5597.
-----------------------------------------
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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