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https://issues.apache.org/jira/browse/AVRO-2058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16715598#comment-16715598
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ASF GitHub Bot commented on AVRO-2058:
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samschlegel commented on issue #237: [AVRO-2058] ReflectData#isNonStringMap
returns true for Utf8 keys
URL: https://github.com/apache/avro/pull/237#issuecomment-445983786
Ah, thanks @dkulp! Sorry this got away from me :sweat_smile:
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> ReflectData#isNonStringMap returns true for Utf8 keys
> -----------------------------------------------------
>
> Key: AVRO-2058
> URL: https://issues.apache.org/jira/browse/AVRO-2058
> Project: Apache Avro
> Issue Type: Bug
> Components: java
> Affects Versions: 1.8.2
> Reporter: Sam Schlegel
> Assignee: Sam Schlegel
> Priority: Critical
> Fix For: 1.9.0
>
> Attachments: AVRO-2058.patch
>
>
> Since {{Utf8}} does not have an {{Stringable}} notation, and is not in
> {{SpecificData#stringableClasses}}, {{ReflectData#isNonStringMap}} returns
> true. This also causes {{ReflectData#isArray}} to return true for maps with
> Utf8 keys, and thus {{GenericData#resolveUnion}} fails as well. This
> ultimately causes {{ReflectData#write}} to fail for schemas that contain a
> union that contains a map, where the data uses Utf8 for strings.
> This following test case reproduces the issue:
> {code:java}
> @Test public void testUnionWithMapWithUtf8Keys() {
> Schema s = new Schema.Parser().parse
> ("[\"null\", {\"type\":\"map\",\"values\":\"float\"}]");
> GenericData data = ReflectData.get();
> HashMap<Utf8,Float> map = new HashMap<Utf8,Float>();
> map.put(new Utf8("foo"), 1.0f);
> assertEquals(1, data.resolveUnion(s, map));
> }
> {code}
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