Michal Foksa created AVRO-4151:
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Summary: When Union annotation includes class it annotates
getSchema() fails with StackOverflowError.
Key: AVRO-4151
URL: https://issues.apache.org/jira/browse/AVRO-4151
Project: Apache Avro
Issue Type: Bug
Components: java
Affects Versions: 1.11.4
Reporter: Michal Foksa
When a class annotated with @Union includes the annotated class (itself),
ReflectData.get().getSchema(AnnotatedClass.class) fails with StackOverflowError
due to going into infinite loop.
Test:
{code:java}
@Union({Animal.class, Cat.class, Dog.class})
public static class Animal {}
public static class Cat extends Animal {}
public static class Dog extends Animal {}
@Test
void union_with_itself() {
ReflectData.get().getSchema(Animal.class);
}{code}
fails with:
{code:java}
java.lang.StackOverflowError
at jdk.proxy2/jdk.proxy2.$Proxy8.value(Unknown Source)
at
org.apache.avro.reflect.ReflectData.getAnnotatedUnion(ReflectData.java:810)
at org.apache.avro.reflect.ReflectData.createSchema(ReflectData.java:703)
at
org.apache.avro.reflect.ReflectData.getAnnotatedUnion(ReflectData.java:811)
at org.apache.avro.reflect.ReflectData.createSchema(ReflectData.java:703)
at
org.apache.avro.reflect.ReflectData.getAnnotatedUnion(ReflectData.java:811)
at org.apache.avro.reflect.ReflectData.createSchema(ReflectData.java:703)
at
org.apache.avro.reflect.ReflectData.getAnnotatedUnion(ReflectData.java:811)
at org.apache.avro.reflect.ReflectData.createSchema(ReflectData.java:703)
.....{code}
I think it is valid use case.
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