Stephen Revilak created AVRO-4184:
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Summary: Copying a decimal field with a default value produces a
AvroTypeException
Key: AVRO-4184
URL: https://issues.apache.org/jira/browse/AVRO-4184
Project: Apache Avro
Issue Type: Bug
Components: java
Affects Versions: 1.12.0
Reporter: Stephen Revilak
Attachments: AvroDemo.java, pom.xml
I'd like to report a regression in avro-1.12.0 where copying a decimal field
with a default value results in a AvroTypeException being thrown.
I've attached a minimal program that exhibits this behavior. To run, download
the files pom.xml and AvroDemo.java. Then
{noformat}
mkdir -p src/main/java/srevilak/test
mv AvroDemo.java src/main/java/srevilak/test
mvn install
java -cp 'target/*' srevilak.test.AvroDemo
{noformat}
It should produce the following output
{noformat}
copying field implicit_zscale type:BYTES pos:0
Exception in thread "main" org.apache.avro.AvroTypeException: Invalid default
for field implicit_zscale: "AA==" not a
{"type":"bytes","logicalType":"decimal","precision":10}
at org.apache.avro.Schema.validateDefault(Schema.java:1719)
at org.apache.avro.Schema$Field.<init>(Schema.java:578)
at org.apache.avro.Schema$Field.<init>(Schema.java:624)
at srevilak.test.AvroDemo.main(AvroDemo.java:19)
{noformat}
I'm calling this a regression because the behavior was not present in
avro-1.11.4. This can by verifed by
* mvn clean
* changing avro.version in pom.xml to 1.11.4
* recompiling and running AvroDemo
Under 1.11.4, the output is
{noformat}
copying field implicit_zscale type:BYTES pos:0
SUCCESS
{noformat}
In 1.12.0, the parsed schema's default value is a TextNode. Copying the
default value results in a BinaryNode that fails validation.
I believe the regression was introduced in
https://github.com/apache/avro/commit/51851d49af3283cd31caecf6bdc7b3a4e973a5a6
Which was work done for AVRO-3876.
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