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https://issues.apache.org/jira/browse/GORA-174?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13509872#comment-13509872
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Alfonso Nishikawa commented on GORA-174:
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Hi, Lewis.
Thank you for trying it. Does it give the same exception as in NUTCH-1477?

Adding union support in the compiler seems to affect serializing and 
deserializing too (and others - added failed tests in attachments).

As you told in other thread, this seems to become a pain. I subscribe ;)
I am working on this issue and will be working all this week :) Suggestions 
much accepted and looking forward them.
                
> GORA compiler does not handle ["string", "null"] unions in the AVRO schema
> --------------------------------------------------------------------------
>
>                 Key: GORA-174
>                 URL: https://issues.apache.org/jira/browse/GORA-174
>             Project: Apache Gora
>          Issue Type: Bug
>          Components: schema
>    Affects Versions: 0.2.1
>            Reporter: Julien Nioche
>            Assignee: Alfonso Nishikawa
>             Fix For: 0.3
>
>         Attachments: failed_tests_after_v3.tar.gz, GORA-174-test.patch, 
> GORA-174v2.patch, GORA-174v3.patch
>
>
> See NUTCH-1477 for description. 
> We are getting NPE when using the DataFileAvroStore, in order to avoid that I 
> modified the schema to allow for null values on some fields e.g.    {"name": 
> "baseUrl", "type": ["string", "null"] }
> however when generating the code for the schema the accessors are not 
> generated by GORA which prevents Nutch from compiling 

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