Douglas Kaminsky created AVRO-1854:
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Summary: NPE on recursive datatype in JSON encoder
Key: AVRO-1854
URL: https://issues.apache.org/jira/browse/AVRO-1854
Project: Avro
Issue Type: Bug
Components: java
Affects Versions: 1.7.7
Reporter: Douglas Kaminsky
Priority: Critical
When trying to encode to JSON a record whose schema contains a recursive type
embedded in another type (ie. an array), the "flatten" method in the {{Parser}}
leaves a hole in the middle of the symbol stack which causes a NPE to occur. My
best guess is that it's leaving space for the embedded recursion but never
populating the symbol, but that code is a bit obtuse so I am having trouble
getting to the root cause (otherwise I would have provided a patch to solve the
problem as well).
Attached is a class with a short main method that replicates the problem with
anonymized versions of my datatypes/record and a screenshot of the symbol stack
at runtime right before the error occurs.
Not yet tested in 1.8.0 but should be easy to verify.
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