vinothchandar commented on a change in pull request #1352: [HUDI-625] Fixing
performance issues around DiskBasedMap & kryo
URL: https://github.com/apache/incubator-hudi/pull/1352#discussion_r383677795
##########
File path:
hudi-common/src/main/java/org/apache/hudi/common/util/SerializationUtils.java
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@@ -121,50 +116,16 @@ Object deserialize(byte[] objectData) {
public Kryo newKryo() {
- Kryo kryo = new KryoBase();
+ Kryo kryo = new Kryo();
// ensure that kryo doesn't fail if classes are not registered with kryo.
kryo.setRegistrationRequired(false);
// This would be used for object initialization if nothing else works
out.
- kryo.setInstantiatorStrategy(new
org.objenesis.strategy.StdInstantiatorStrategy());
+ kryo.setInstantiatorStrategy(new Kryo.DefaultInstantiatorStrategy(new
StdInstantiatorStrategy()));
// Handle cases where we may have an odd classloader setup like with
libjars
// for hadoop
kryo.setClassLoader(Thread.currentThread().getContextClassLoader());
return kryo;
}
- private static class KryoBase extends Kryo {
- @Override
- protected Serializer newDefaultSerializer(Class type) {
- final Serializer serializer = super.newDefaultSerializer(type);
- if (serializer instanceof FieldSerializer) {
- final FieldSerializer fieldSerializer = (FieldSerializer) serializer;
- fieldSerializer.setIgnoreSyntheticFields(true);
- }
- return serializer;
- }
-
- @Override
- protected ObjectInstantiator newInstantiator(Class type) {
- return () -> {
- // First try reflectasm - it is fastest way to instantiate an object.
- try {
- final ConstructorAccess access = ConstructorAccess.get(type);
- return access.newInstance();
- } catch (Throwable t) {
- // ignore this exception. We may want to try other way.
- }
- // fall back to java based instantiation.
- try {
- final Constructor constructor = type.getConstructor();
- constructor.setAccessible(true);
- return constructor.newInstance();
- } catch (NoSuchMethodException | IllegalAccessException |
InstantiationException
- | InvocationTargetException e) {
- // ignore this exception. we will fall back to default
instantiation strategy.
- }
- return
super.getInstantiatorStrategy().newInstantiatorOf(type).newInstance();
Review comment:
@lamber-ken to gary's point , we also need to consider this case
>What about the user-defined custom payload? Do we need to register it
somewhere?
classes extending BaseAvroPayload may be okay. but we allow users to
implement their own payload classes.. if they don't have data converted as
`byte[]`, do we need to register them etc?
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