Mike Percy created AVRO-1118:
--------------------------------
Summary: Specifying null as default of a union only works if null
is specified as first type in the union
Key: AVRO-1118
URL: https://issues.apache.org/jira/browse/AVRO-1118
Project: Avro
Issue Type: Bug
Affects Versions: 1.6.3
Reporter: Mike Percy
There is some unexpected behavior I am coming across where if I specify a union
as such:
"type": ["string", "null"],
"default": null
I get an Exception:
Exception in thread "main" org.apache.avro.AvroTypeException: Non-string
default value for string: null
at
org.apache.avro.io.parsing.ResolvingGrammarGenerator.encode(ResolvingGrammarGenerator.java:363)
at
org.apache.avro.io.parsing.ResolvingGrammarGenerator.encode(ResolvingGrammarGenerator.java:350)
at
org.apache.avro.io.parsing.ResolvingGrammarGenerator.getBinary(ResolvingGrammarGenerator.java:293)
at
org.apache.avro.io.parsing.ResolvingGrammarGenerator.resolveRecords(ResolvingGrammarGenerator.java:271)
at
org.apache.avro.io.parsing.ResolvingGrammarGenerator.generate(ResolvingGrammarGenerator.java:118)
at
org.apache.avro.io.parsing.ResolvingGrammarGenerator.generate(ResolvingGrammarGenerator.java:50)
at org.apache.avro.io.ResolvingDecoder.resolve(ResolvingDecoder.java:82)
at org.apache.avro.io.ResolvingDecoder.<init>(ResolvingDecoder.java:46)
at
org.apache.avro.io.DecoderFactory.resolvingDecoder(DecoderFactory.java:307)
at
org.apache.avro.generic.GenericDatumReader.getResolver(GenericDatumReader.java:118)
at
org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:133)
at org.apache.avro.file.DataFileStream.next(DataFileStream.java:233)
at org.apache.avro.file.DataFileStream.next(DataFileStream.java:220)
...
Whereas if I specify the schema as:
"type": ["null", "string"],
"default": null
It works as expected.
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