writing unions with multiple records, fixed or enums can choose wrong branch
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Key: AVRO-656
URL: https://issues.apache.org/jira/browse/AVRO-656
Project: Avro
Issue Type: Bug
Components: java
Affects Versions: 1.4.0
Reporter: Doug Cutting
Assignee: Doug Cutting
According to the specification, a union may contain multiple instances of a
named type, provided they have different names. There are several bugs in the
Java implementation of this when writing data:
- for record, only the short-name of the record is checked, so the branch for
a record of the same name in a different namespace may be used by mistake
- for enum and fixed, the name of the record is not checked, so the first enum
or fixed in the union will always be assumed when writing. in many cases this
may cause the wrong data to be written, potentially corrupting output.
This is not a regression. This has never been implemented correctly by Java.
Python and Ruby never check names, but rather perform a full, recursive
validation of content.
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