[jira] Created: (SOLR-1675) Placing Custom Transform in example/lib directory does not work properly

[Matt Inger (JIRA)]

Placing Custom Transform in example/lib directory does not work properly
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                 Key: SOLR-1675
                 URL: https://issues.apache.org/jira/browse/SOLR-1675
             Project: Solr
          Issue Type: Bug
          Components: contrib - DataImportHandler
    Affects Versions: 1.4
            Reporter: Matt Inger
            Priority: Blocker


I have created a Custom transformer for transforming a javax.sql.Array instance 
into a java.lang.Object[] value, and placed it in the example/lib directory.  I 
then configured the transformer appropriately in my db-data-config.xml:

{code}
<entity ...
transformer="org.apache.solr.handler.dataimport.SqlArrayTransformer"
{code}

However, when i try to actually index my documents, i get the following error 
in the console:

{code}
org.apache.solr.handler.dataimport.DataImportHandlerException: 
java.lang.NoClassDefFoundError: org/apache/solr/handler/dataimport/Transformer
        at 
org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:424)
        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.NoClassDefFoundError: 
org/apache/solr/handler/dataimport/Transformer
{code}

It seems there is some issue with the classloader going on here, and the only 
solution to this problem seems to be to find the exploded web application in 
the "work" directory, and place the .jar file for my transformer in the 
WEB-INF/lib directory there.  My guess is that the classloader for the custom 
transformer class is not using the web application's class loader as it's 
parent classloader, and as a result, the Transformer class can't be found.

I believe I tried this in 1.5-dev as well and had no success either.



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