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https://issues.apache.org/jira/browse/AVRO-1854?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Douglas Kaminsky updated AVRO-1854:
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Attachment: RecursiveFlattenBugRegression.java
> 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
> Attachments: RecursiveFlattenBugRegression.java
>
>
> 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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