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Date: Tue, 4 Mar 2014 17:29:21 +0000 (UTC)
From: "Matthew Campbell (JIRA)" <jira@apache.org>
To: dev@avro.apache.org
Message-ID: <JIRA.12538833.1326904854647.11781.1393954161675@arcas>
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References: <JIRA.12538833.1326904854647@arcas>
Subject: [jira] [Commented] (AVRO-997) Union of enum and null cannot be
 serialized
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    [ https://issues.apache.org/jira/browse/AVRO-997?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13919659#comment-13919659 ] 

Matthew Campbell commented on AVRO-997:
---------------------------------------

We're running into this issue as well on Avro 1.7.6.  We've got a IDL that imports some enum schemas in JSON format (provided by another tool) and we want to have some optional fields in a record of the enum type.  These types can't be serialized, though.  Just putting a +1 in for this being a blocker for us.  We'll work around it in our model for now, but I wanted to leave a note here since the issue has a patch but hasn't been touched in a while.

> Union of enum and null cannot be serialized
> -------------------------------------------
>
>                 Key: AVRO-997
>                 URL: https://issues.apache.org/jira/browse/AVRO-997
>             Project: Avro
>          Issue Type: Bug
>    Affects Versions: 1.5.1
>            Reporter: Aaron Kimball
>            Assignee: Sean Busbey
>             Fix For: 1.8.0
>
>         Attachments: AVRO-997.patch, AVRO-997.patch, AVRO-997.permissive-generic-api.patch
>
>
> I have a schema like:
> {code}
> [
> {
>   "type": "enum",
>   "name": "Gender",
>   "symbols": ["M", "F"]
> },
> {
>   "type" : "record",
>   "name" : "Foo",
>   "fields" : [
>     { "type" : ["Gender", "null"], "name" : "gender" },
>     ...
>   ]
> }
> ]
> {code}
> I build a record like {{Foo foo = new Foo(); foo.gender = Gender.M;}}
> When I go to serialize this, I get:
> {code}Not in union [{"type":"enum","name":"Gender","symbols":["M","F"]},"null"]: M
> 	at org.apache.avro.generic.GenericData.resolveUnion(GenericData.java:482)
> 	at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:70)
> 	at org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:104)
> 	at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:65)
> 	at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:57)
> {code}


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