Avro should support the Apache Maven Shade plugin class relocation feature
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Key: AVRO-941
URL: https://issues.apache.org/jira/browse/AVRO-941
Project: Avro
Issue Type: Improvement
Components: java
Affects Versions: 1.5.4
Reporter: Matt Massie
The Apache shade plugin allows maven builds to create an uber jar that contains
dependencies in the project. In addition, the shade plugin allows you to
relocate dependencies into a private namespace to prevent class conflicts on
shared class paths. Avro does not support relocation.
All generated Avro objects contain a string field named SCHEMA$ which serves as
the authority for the class namespace. When the shade plugin updates the byte
code to relocate the class, it doesn't alter the SCHEMA$ string. This break
Avro use of reflection since the namespace in SCHEMA$ points to an incorrect
location.
I spoke with Doug about the issue and he was kind enough to provide a quick
hack in order to fix this issue. The hack is to check for mismatches between
the byte code and the SCHEMA$ and, when they don't match, to defer to the byte
code. I'll attach Doug's patch to this Jira.
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