Kryo 3.0.1 - still get NullPointerException when try to deserialize ArrayList !

[Eylon Segal]

I can't get over this - whatever I do ... !

 

either if I uses DefaultInstantiatorStrategy or StdInstantiatorStrategy for the ArrayList.class I get the Exception...

 

I don't know what else I can do - need help please !

------------------------------------------------------------------------------------------------------

 

((Kryo.DefaultInstantiatorStrategy) kryo.getInstantiatorStrategy()).setFallbackInstantiatorStrategy(

new StdInstantiatorStrategy());

//InstantiatorStrategy defaultInstantiatorStrategy = new DefaultInstantiatorStrategy();

InstantiatorStrategy stdInstantiatorStrategy =

new StdInstantiatorStrategy();

kryo.getRegistration(ArrayList.

class).setInstantiator(stdInstantiatorStrategy.newInstantiatorOf(ArrayList.class));

[Nate]

I don't see an exception in your post.

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[Eylon Segal]

2015-06-30 21:36:27,351 ERROR [UIRKryoEncoderDecoderImpl-serializeFromBytes]Exception in serializeFromBytes : java.lang.NullPointerException
Serialization trace:
subscriberProfile (com.starhome.services.promotion.sparx.datatypes.SparxSFIDataMsg)
msg (com.starhome.services.promotion.datatypes.PromotionSFIData)
com.esotericsoftware.kryo.KryoException: java.lang.NullPointerException
Serialization trace:
subscriberProfile (com.starhome.services.promotion.sparx.datatypes.SparxSFIDataMsg)
msg (com.starhome.services.promotion.datatypes.PromotionSFIData)
 at com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:150)
 at com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:557)
 at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:705)
 at com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:131)
 at com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:557)
 at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:787)
 at com.starhome.resources.uir.uircache.redis.kryo.UIRKryoEncoderDecoderImpl.serializeFromBytes(UIRKryoEncoderDecoderImpl.java:179)
 at com.starhome.resources.uir.uircache.redis.kryo.UIRKryoEncoderDecoderImpl.decodeUIRObjectFromProtocolBufferMap(UIRKryoEncoderDecoderImpl.java:98)
 at com.starhome.resources.uir.uircache.UirCache.fetchFromRedisCache(UirCache.java:1556)
 at com.starhome.resources.uir.uircache.UirCache.findDataInCache(UirCache.java:846)
 at com.starhome.resources.uir.uircache.UirCache.searchByImsi(UirCache.java:719)
 at com.starhome.resources.uir.uircache.UirCache.findDataInCache(UirCache.java:575)
 at com.starhome.resources.uir.SyncUirImpl.request(SyncUirImpl.java:76)
 at com.starhome.resources.uir.UIRConnector.syncRequest(UIRConnector.java:306)
 at com.starhome.services.utils.oneFetchOneSet.OneFetch.fetchData(OneFetch.java:506)
 at com.starhome.services.utils.oneFetchOneSet.OneFetch.oneFetch(OneFetch.java:281)
 at com.starhome.services.utils.oneFetchOneSet.OneFetch.oneFetch(OneFetch.java:138)
 at com.starhome.services.promotion.stateHandlers.InitHandler.handleLoadGenericSubscriber(InitHandler.java:397)
 at com.starhome.services.promotion.stateHandlers.InitHandler.initSessionOnVirtualEvent(InitHandler.java:333)
 at com.starhome.services.promotion.stateHandlers.InitHandler.initSession(InitHandler.java:261)
 at com.starhome.services.promotion.stateHandlers.InitHandler.handleInit(InitHandler.java:190)
 at com.starhome.services.promotion.stateHandlers.InitHandler.handleEvent(InitHandler.java:117)
 at com.starhome.services.promotion.ServiceManagerPromotion.handleEvent(ServiceManagerPromotion.java:1813)
 at com.starhome.services.promotion.ServiceManagerPromotion.onEvent(ServiceManagerPromotion.java:805)
 at com.starhome.ise.itcm.ContextProcessor.handleEvent(ContextProcessor.java:513)
 at com.starhome.ise.itcm.ContextProcessor.processContext(ContextProcessor.java:309)
 at com.starhome.ise.itcm.ContextProcessor.run(ContextProcessor.java:764)
 at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.NullPointerException
 at java.util.Arrays$ArrayList.size(Arrays.java:2847)
 at java.util.AbstractList.add(AbstractList.java:108)
 at com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:134)
 at com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:40)
 at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:705)
 at com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:131)
 ... 27 more

[Nate]

I can only guess without an SSCE, but probably ArrayList gets created without its constructor being called (that is what StdInstantiatorStrategy does), so it's internal state is inconsistent (meaning FUBAR).

[Scott D.]

See: https://github.com/EsotericSoftware/kryo/issues/314

If that is the issue you are trying to work around, this is fixed in 3.0.2.