Peter created AVRO-3048:
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Summary: Using builders leads to performance degradation
Key: AVRO-3048
URL: https://issues.apache.org/jira/browse/AVRO-3048
Project: Apache Avro
Issue Type: Bug
Components: java
Affects Versions: 1.10.1, 1.9.2
Reporter: Peter
When you do a .newBuilder() for avro generated classes, this will call
org.apache.avro.specific.SpecificData.getForSchema:
public static SpecificData getForSchema(Schema reader) {
if (reader.getType() == Type.RECORD) {
final String className = getClassName(reader);
if (className != null) {
final Class<?> clazz;
try {
*clazz = Class.forName(className);*
*return getForClass(clazz);*
*} catch (ClassNotFoundException e) {*
*return SpecificData.get();*
}
}
}
which seems then to seldom find the value inside the try and a lot of
ClassNotFoundException is thrown.
Throwing internal exceptions has great performance penalties and in practice
users of avro 1.9.x. and 1.10.x in high performance applications are forced not
to use builders.
Information about same problem is also found on:
[https://forums.databricks.com/questions/50803/orgapacheavrospecificspecificdatagetforschema-sear.html]
Problem exists on at least 1.9.2 and 1.10.1 (but not on 1.7.x)
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