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Raman Gupta commented on AVRO-2400: ----------------------------------- Having just encountered a situation in which I wanted to refactor how some schemas were organized by changing their namespaces, but otherwise leaving them exactly the same, and having quite a difficult time doing that with 1.9, I'd certainly appreciate a return to the 1.8 behavior of ignoring the namespace when checking schema compat. Alternately, allowing users to maintain compatibility by specifying a record "alias" that can be fully qualified to the old namespace + name would work also, and be more explicit, and allow record renames as well. > Avro 1.9.0 can't resolve schemas that can be resolved in 1.8.2 > -------------------------------------------------------------- > > Key: AVRO-2400 > URL: https://issues.apache.org/jira/browse/AVRO-2400 > Project: Apache Avro > Issue Type: Bug > Components: java > Reporter: Jacob Tolar > Priority: Blocker > Fix For: 1.10.0, 1.9.1 > > > The failure occurs in ResolvingGrammarGenerator when reader and writer schema > have an array of records with different full names (e.g. different > namespace). > {code:java} > Exception in thread "main" java.lang.ClassCastException: > org.apache.avro.Resolver$ReaderUnion cannot be cast to > org.apache.avro.Resolver$Container{code} > Avro 1.8.2 allowed this behavior but it now fails in 1.9.0. Looking at the > jiras and code, I don't believe this was intentional ( AVRO-2275, > [https://github.com/apache/avro/commit/39d959e1c6a1f339f03dab18289e47f27c10be7f] > ). > > It looks like there were some attempts to keep compatibility ( > [https://github.com/apache/avro/blob/branch-1.9/lang/java/avro/src/main/java/org/apache/avro/Resolver.java] > , e.g. see the commented out check for w.getFullName() in resolve()) but > this case was missed. > > See this simple example to reproduce. > [https://gist.github.com/jacobtolar/c88d43ab4e8767227891e5cdc188ffad] -- This message was sent by Atlassian JIRA (v7.6.3#76005)