[AVRO-3654] BigDecimal not supported in GenericData.getSchemaName() method

• Type: Improvement
• Status: Open
• Priority: Critical
• Resolution: Unresolved
• Affects Version/s: 1.11.1
• Component/s: java
• Assignee: Unassigned
• Reporter: Emmanuel Brard
• Created: 25/Oct/22 10:57
• Updated: 07/Feb/23 10:36

Description

When trying to add a `GenericRecord` in a Java set, the hashcode computation code is called.

If a Union contains a decimal logical type which is mapped with a `BigDecimal` in Java, the call to `add` will fail with:

Caused by: org.apache.avro.AvroRuntimeException: Unknown datum type java.math.BigDecimal: 4042030.00
	at org.apache.avro.generic.GenericData.getSchemaName(GenericData.java:933)
	at org.apache.avro.generic.GenericData.resolveUnion(GenericData.java:892)
	at org.apache.avro.generic.GenericData.hashCode(GenericData.java:1113)
	at org.apache.avro.generic.GenericData.hashCodeAdd(GenericData.java:1127)
	at org.apache.avro.generic.GenericData.hashCode(GenericData.java:1103)
	at org.apache.avro.generic.GenericData.hashCode(GenericData.java:1113)
	at org.apache.avro.generic.GenericData.hashCodeAdd(GenericData.java:1127)
	at org.apache.avro.generic.GenericData.hashCode(GenericData.java:1103)
	at org.apache.avro.generic.GenericData$Record.hashCode(GenericData.java:292)
	at java.base/java.util.HashMap.hash(HashMap.java:338)
	at java.base/java.util.HashMap.put(HashMap.java:610)
	at java.base/java.util.HashSet.add(HashSet.java:221)

The method `getSchemaName` does not handle the BigDecimal Java type, which is used by the `DecimalConversion`.