Raman Gupta created AVRO-2383:
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Summary: Avro 1.9 applyAliases broken with self-referential records
Key: AVRO-2383
URL: https://issues.apache.org/jira/browse/AVRO-2383
Project: Apache Avro
Issue Type: Bug
Components: java
Affects Versions: 1.9.0
Reporter: Raman Gupta
If a schema has a field with a self-referential record, the applyAliases
function produces a NullPointerException.
The problem appears to be that the value for the record put into "seen" has no
fields, and then when the equality check is done, the `Schema.equals` method
assumes that fields is not null. Making the `equals` method more defensive with
null-checking "fields" solves the problem, as the `putAll` method adds the
fields back in, but I'm not sure if that is actually the best fix.
I will attach a patch with this fix.
I'm marking this as a blocker for 1.9, as this behavior will cause a
NullPointerException in this situation any time data is decoded where the
writer and reader schema are different, and there are any aliases defined in
the reader (even if these aliases are unrelated to the self-referential record).
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