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https://issues.apache.org/jira/browse/AVRO-2539?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nikita Ryanov updated AVRO-2539:
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Issue Type: Improvement (was: Bug)
> ThriftData produces not compatible avro schemas
> -----------------------------------------------
>
> Key: AVRO-2539
> URL: https://issues.apache.org/jira/browse/AVRO-2539
> Project: Apache Avro
> Issue Type: Improvement
> Components: java
> Affects Versions: 1.9.0
> Reporter: Nikita Ryanov
> Priority: Major
>
> Currently, ThrifdData class produces not compatible avro schema in terms of
> AvroCompatibility rules.
> For example, consider this thrift structs:
> {code:java}
> struct V1 {
> 1: required string f1,
> 2: optional string f2
> }
> struct V1 {
> 1: required string f1,
> 2: optional string f2,
> 3: optional string f3
> }{code}
> Produced schemas will be:
> {noformat}
> {"type":"record","name":"V1","namespace":"schemakeeper.serialization.thrift.test","fields":[{"name":"f1","type":["null",{"type":"string","avro.java.string":"String"}]},{"name":"f2","type":["null",{"type":"string","avro.java.string":"String"}],"default":null}]}
> {"type":"record","name":"V2","namespace":"schemakeeper.serialization.thrift.test","fields":[{"name":"f1","type":["null",{"type":"string","avro.java.string":"String"}]},{"name":"f2","type":["null",{"type":"string","avro.java.string":"String"}]},
> {"name":"f3","type":["null",{"type":"string","avro.java.string":"String"}]}]}
> {noformat}
> The problem is that if i try to check this schemas using BACKWARD
> compatibility checker i will get false, because fields f2 and f3 has no
> default values even if they are optional.
> Also, if i use default value in my thrift definition the resulting avro
> schema will not contain it
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