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From "Stephan Ewen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-7997) Avro should be always in the user code
Date Mon, 06 Nov 2017 13:41:00 GMT
Stephan Ewen created FLINK-7997:

             Summary: Avro should be always in the user code
                 Key: FLINK-7997
                 URL: https://issues.apache.org/jira/browse/FLINK-7997
             Project: Flink
          Issue Type: Improvement
            Reporter: Stephan Ewen
            Assignee: Stephan Ewen
             Fix For: 1.4.0

Having Avro in the user code space makes it possible for users to use different Avro versions
that the ones pulled in by an overloaded classpath (for example when having Hadoop in the

This is possible through the new child-first classloading in Flink 1.4.

Also, this should fix the problem of "X cannot be cast to X", because Avro classes will be
scoped to the user code class loader, and the Avro schema cache will not be JVM-wide-

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