[SOLR-1794] Dataimport of CLOB fields fails when getCharacterStream() is defined in a superclass

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4
• Fix Version/s: 3.1, 4.0-ALPHA
• Component/s: contrib - DataImportHandler

Environment

Oracle WebLogic 10.3.2

• Assignee: Robert Muir
• Reporter: Gunnar Gauslaa Bergem
• Created: 25/Feb/10 09:09
• Updated: 30/Mar/11 15:45
• Resolved: 19/Oct/10 15:05

Description

When running Solr on WebLogic application server 10.3.2, the dataimport for CLOB fields are failing. Line 109 in FieldReaderDataSource.java illustrates the problem:

Method m = clob.getClass().getDeclaredMethod("getCharacterStream");

Since getDeclaredMethod instead of getMethod is used, the getCharacterStream() method will not be found if it is defined in a superclass of clob. This is exactly what
happens in e.g. WebLogic 10.3.2, since the object returned is a dynamically created wrapper class called Clob_oracle_sql_CLOB. This class does not define
getCharacterStream(), but it inherits from another class that does. This problem will also occur in other places where getDeclaredMethod used in conjunction with the CLOB
or BLOB datatypes.

Stacktrace:

org.apache.solr.handler.dataimport.DataImportHandlerException: Unable to get reader from clob Processing Document # 1
at org.apache.solr.handler.dataimport.DataImportHandlerException.wrapAndThrow(DataImportHandlerException.java:72)
at org.apache.solr.handler.dataimport.FieldReaderDataSource.readCharStream(FieldReaderDataSource.java:118)
at org.apache.solr.handler.dataimport.ClobTransformer.readFromClob(ClobTransformer.java:69)
at org.apache.solr.handler.dataimport.ClobTransformer.transformRow(ClobTransformer.java:61)
at org.apache.solr.handler.dataimport.EntityProcessorWrapper.applyTransformer(EntityProcessorWrapper.java:195)
at org.apache.solr.handler.dataimport.EntityProcessorWrapper.nextRow(EntityProcessorWrapper.java:241)
at org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:357)
at org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:383)
at org.apache.solr.handler.dataimport.DocBuilder.doFullDump(DocBuilder.java:242)
at org.apache.solr.handler.dataimport.DocBuilder.execute(DocBuilder.java:180)
at org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:331)
at org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:389)
at org.apache.solr.handler.dataimport.DataImporter$1.run(DataImporter.java:370)
Caused by: java.lang.NoSuchMethodException: weblogic.jdbc.wrapper.Clob_oracle_sql_CLOB.getCharacterStream()
at java.lang.Class.getDeclaredMethod(Class.java:1937)
at org.apache.solr.handler.dataimport.FieldReaderDataSource.readCharStream(FieldReaderDataSource.java:109)
... 11 more