Asynchronous deserialization: String instead of real class type is attempted to be set as a field

Sorani / kryo

Automatically exported from code.google.com/p/kryo

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What steps will reproduce the problem? 1. This class is used as a property in an abstract superclass: http://pastebin.com/L8DjuGhW 2. If deserialize the object synchronously, everything works fine. See the code in step 3. When it's not wrapped in a Runnable and started by an ExecutorService Thread it's deserialized correctly. 3. If I do it asynchronously (see: http://pastebin.com/mvWfV5Yy), I get this exception, because kryo tries to set an String instead of the MetaDataClass. ERROR [pool-5-thread-4] messaging.ZeroMqEventSink: java.lang.IllegalArgumentException: Can not set datatypes.MetaDataClass field events.AbstractBaseEvent.metaData to java.lang.String Serialization trace: metaData (entities.LocationEvent) com.esotericsoftware.kryo.KryoException: java.lang.IllegalArgumentException: Can not set datatypes.MetaDataClass field entities.AbstractBaseEvent.metaData to java.lang.String Serialization trace: metaData (entities.LocationEvent) at com.esotericsoftware.kryo.serializers.FieldSerializer$ObjectField.read(FieldSerializer.java:626) ~[kryo-2.20.jar:?] at com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:221) ~[kryo-2.20.jar:?] at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:629) ~[kryo-2.20.jar:?] at messaging.ZeroMqEventSink$DeserRunnable.getObject(ZeroMqEventSink.java:155) ~[classes/:?] at messaging.ZeroMqEventSink$DeserRunnable.run(ZeroMqEventSink.java:103) ~[classes/:?] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) ~[?:1.7.0_40-ea] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) ~[?:1.7.0_40-ea] at java.lang.Thread.run(Thread.java:724) ~[?:1.7.0_40-ea] Caused by: java.lang.IllegalArgumentException: Can not set entities.datatypes.MetaDataClass field entities.events.AbstractBaseEvent.metaData to java.lang.String at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:164) ~[?:1.7.0_40-ea] at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:168) ~[?:1.7.0_40-ea] at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:81) ~[?:1.7.0_40-ea] at java.lang.reflect.Field.set(Field.java:741) ~[?:1.7.0_40-ea] at com.esotericsoftware.kryo.serializers.FieldSerializer$ObjectField.read(FieldSerializer.java:619) ~[kryo-2.20.jar:?] ... 7 more What is the expected output? What do you see instead? Kryo serializes the field correctly, but when done asynchronously Kryo tries to set the field as a String. What version of the Kryo are you using? 2.20 Please provide any additional information below.

The exact same code executed with kryo 2.22 yields this interesting error for 
every deserialized object (only the size values vary):

2014-03-24 22:05:08,499 ERROR [pool-5-thread-7] .messaging.ZeroMqEventSink: 
java.lang.IndexOutOfBoundsException: Index: 108, Size: 53
Serialization trace:
metaData (entities.events.DocumentEvent)
com.esotericsoftware.kryo.KryoException: java.lang.IndexOutOfBoundsException: 
Index: 108, Size: 53
Serialization trace:
metaData (entities.events.DocumentEvent)
    at com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:125) ~[kryo-2.22.jar:?]
    at com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:507) ~[kryo-2.22.jar:?]
    at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:672) ~[kryo-2.22.jar:?]
    at messaging.ZeroMqEventSink$DeserRunnable.getObject(ZeroMqEventSink.java:155) ~[classes/:?]
    at messaging.ZeroMqEventSink$DeserRunnable.run(ZeroMqEventSink.java:103) ~[classes/:?]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) ~[?:1.7.0_40-ea]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) ~[?:1.7.0_40-ea]
    at java.lang.Thread.run(Thread.java:724) ~[?:1.7.0_40-ea]
Caused by: java.lang.IndexOutOfBoundsException: Index: 108, Size: 53
    at java.util.ArrayList.rangeCheck(ArrayList.java:635) ~[?:1.7.0_40-ea]
    at java.util.ArrayList.get(ArrayList.java:411) ~[?:1.7.0_40-ea]
    at com.esotericsoftware.kryo.util.MapReferenceResolver.getReadObject(MapReferenceResolver.java:42) ~[kryo-2.22.jar:?]
    at com.esotericsoftware.kryo.Kryo.readReferenceOrNull(Kryo.java:820) ~[kryo-2.22.jar:?]
    at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:692) ~[kryo-2.22.jar:?]
    at com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:106) ~[kryo-2.22.jar:?]
    ... 7 more
#
[thread 30979 also had an error]
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x0000000101dd9923, pid=7027, tid=35075
#
# JRE version: Java(TM) SE Runtime Environment (7.0_40-b35) (build 
1.7.0_40-ea-b35)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (24.0-b54 mixed mode bsd-amd64 
compressed oops)
# Problematic frame:
# J  java.util.HashMap.hash(Ljava/lang/Object;)I
#
# Failed to write core dump. Core dumps have been disabled. To enable core 
dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /Users/logs/hs_err_pid7027.log
Compiled method (c2)   35064   32             java.util.HashMap::hash (55 bytes)
 total in heap  [0x0000000101dd9790,0x0000000101dd9b90] = 1024
 relocation     [0x0000000101dd98b0,0x0000000101dd98e0] = 48
 main code      [0x0000000101dd98e0,0x0000000101dd9a40] = 352
 stub code      [0x0000000101dd9a40,0x0000000101dd9a68] = 40
 oops           [0x0000000101dd9a68,0x0000000101dd9a78] = 16
 scopes data    [0x0000000101dd9a78,0x0000000101dd9ad8] = 96
 scopes pcs     [0x0000000101dd9ad8,0x0000000101dd9b48] = 112
 dependencies   [0x0000000101dd9b48,0x0000000101dd9b50] = 8
 handler table  [0x0000000101dd9b50,0x0000000101dd9b80] = 48
 nul chk table  [0x0000000101dd9b80,0x0000000101dd9b90] = 16
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.sun.com/bugreport/crash.jsp
#

Original comment by dabuks...@gmail.com on 24 Mar 2014 at 9:12

Sorani / kryo

Asynchronous deserialization: String instead of real class type is attempted to be set as a field #149