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ASF subversion and git services commented on AVRO-1883: ------------------------------------------------------- Commit 5acae5e10ee5d9d7d98b208e29a930f1e66f40ae in avro's branch refs/heads/master from [~rdblue] [ https://git-wip-us.apache.org/repos/asf?p=avro.git;h=5acae5e ] AVRO-1883: Java: Fix incompatible schema detection nested in unions. Contributed by Yibing Shi. > Schema validator cannot find broken backwards compatibility in Union type > elements > ---------------------------------------------------------------------------------- > > Key: AVRO-1883 > URL: https://issues.apache.org/jira/browse/AVRO-1883 > Project: Avro > Issue Type: Bug > Affects Versions: 1.8.1 > Reporter: Yibing Shi > Assignee: Yibing Shi > Priority: Critical > Attachments: AVRO-1883.1.patch > > > Consider below 2 schemas: > *Schema 1*: > {noformat} > [ > { > "type": "record", > "name": "rec1", > "fields": [ > { > "name": "age", > "type": "long" > } > ] > }, > { > "type": "record", > "name": "rec2", > "fields": [ > { > "name": "username", > "type": "string" > } > ] > } > ] > {noformat} > *Schema 2*: > {noformat} > [ > { > "type": "record", > "name": "rec1", > "fields": [ > { > "name": "age", > "type": "long" > }, > { > "name": "address", > "type": "string" > } > ] > }, > { > "type": "record", > "name": "rec2", > "fields": [ > { > "name": "username", > "type": "string" > } > ] > } > ] > {noformat} > The {{rec1}} field in these 2 unions are not compatible, because the > {{address}} field of {{rec1}} in the second one is not nullable. However, if > we check them with validate like below, validator doesn't return any error: > {code} > final SchemaValidator backwardValidator = new > SchemaValidatorBuilder().canReadStrategy().validateLatest(); > final Schema schema1 = new Schema.Parser().parse(schema1Str); > final Schema schema2 = new Schema.Parser().parse(schema2Str); > backwardValidator.validate(schema2, Arrays.asList(schema1)); > {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)