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https://issues.apache.org/jira/browse/AVRO-12?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12701232#action_12701232
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Doug Cutting commented on AVRO-12:
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I would not oppose a patch that keeps the seen table on the stack rather than
in a ThreadLocal. On one hand, it's a little cleaner, but on the other, it
takes more code, since we effectively need to replicate List#equals,
List#hashCode, Map#equals and Map#hashCode, which the ThreadLocal approach
avoids, albeit in an ugly way.
> Bug in comparison of recurisive schemas
> ---------------------------------------
>
> Key: AVRO-12
> URL: https://issues.apache.org/jira/browse/AVRO-12
> Project: Avro
> Issue Type: Bug
> Components: java
> Affects Versions: 1.0
> Reporter: Hong Tang
> Assignee: Doug Cutting
> Fix For: 1.0
>
> Attachments: AVRO-12.patch
>
>
> Comparison of recursive schema will lead to infinite recursion (eventually
> leading to java.lang.StackOverflowError.)
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