java.lang.IncompatibleClassChangeError

[kdehairy]

I'm getting this crash lately. It complains about SerializedName class missing the "value" method.

This is the stacktrace:

java.lang.IncompatibleClassChangeError: Couldn't find com.google.gson.annotations.SerializedName.value
at libcore.reflect.AnnotationAccess.toAnnotationInstance(AnnotationAccess.java:659)
at libcore.reflect.AnnotationAccess.toAnnotationInstance(AnnotationAccess.java:641)
at libcore.reflect.AnnotationAccess.getDeclaredAnnotation(AnnotationAccess.java:170)
at java.lang.reflect.Field.getAnnotation(Field.java:242)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getFieldName(ReflectiveTypeAdapterFactory.java:71)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getFieldName(ReflectiveTypeAdapterFactory.java:67)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:142)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:83)
at com.google.gson.Gson.getAdapter(Gson.java:359)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory.create(CollectionTypeAdapterFactory.java:52)
at com.google.gson.Gson.getAdapter(Gson.java:359)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getFieldAdapter(ReflectiveTypeAdapterFactory.java:122)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.access$100(ReflectiveTypeAdapterFactory.java:46)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.(ReflectiveTypeAdapterFactory.java:92)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:91)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:142)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:83)
at com.google.gson.Gson.getAdapter(Gson.java:359)
at com.google.gson.Gson.fromJson(Gson.java:809)
at com.google.gson.Gson.fromJson(Gson.java:875)
at com.google.gson.Gson.fromJson(Gson.java:848)

[dominolog]

Any ideas how to fix/omit this problem. I have been reading about this issue and it looks it is realted to Annotations handling on Android 5+ devices (mostly Samsung).
The related issues are:
https://code.google.com/p/android/issues/detail?id=172339
http://developer.samsung.com/forum/board/thread/view.do?boardName=General&messageId=280930

[inder123]

Did you upgrade to Gson 2.4? Try downgrading to Gson 2.3.1 and see if that fixes the problem.

[dominolog]

Actually I had version 2.2.4. Is it still a case?

[inder123]

No, in that case, it is some other issue.

[swankjesse]

No action for us to take here.

[dominolog]

Any hints there?
I changed JSON library from Gson to Jackson and the problem is the same. I get exceptions
java.lang.IncompatibleClassChangeError: Couldn't find com.fasterxml.jackson.annotation.JsonProperty.value

Any ideas how to omit this? Maybe different version of Android annotation from V4 library?
It looks like millions of apps across the world are affected because who doesn't use JSON with annotations processing?

[JakeWharton]

That seems a stretch, our app uses Gson and annotation processing and does
not experience this problem.

On Mon, Nov 23, 2015 at 12:33 PM Dominik Tomczak notifications@github.com
wrote:

Any hints there?
I changed JSON library from Gson to Jackson and the problem is the same. I
get exceptions
java.lang.IncompatibleClassChangeError: Couldn't find
com.fasterxml.jackson.annotation.JsonProperty.value

Any ideas how to omit this? Maybe different version of Android annotation
from V4 library?
It looks like millions of apps across the world are affected because who
doesn't use JSON with annotations processing?

—
Reply to this email directly or view it on GitHub
#726 (comment).

[dominolog]

Really odd. I can see on my error console growing number of that exceptions.
Previously it was:
(GSON)
java.lang.IncompatibleClassChangeError: Couldn't find com.google.gson.annotations.SerializedName.value

(Jackson)
Now it is:
java.lang.IncompatibleClassChangeError: Couldn't find com.fasterxml.jackson.annotation.JsonProperty.value

I use Eclipse, Android 23 (6.0 SDK) as build SDK and latest v4/v7 libraries. I don't add special proguard file, it is a default one.
I can see this error being reported for Samsung 5.+ devices.
Any ideas are highly appreciated.

Thanks

[kdehairy]

I digged into this issue. It happens with any annotation class with a "value" method in it. SerializedName it is or other.
In the libcore code, it tries to grap the Method with the "value" name through reflection, and for some reason it fails to find it "MethodNotFound" exception which is re-thrown as what we see here.
It is not related to gson specifically as I can see.

[pamoptly]

I'm from Optimizely, and we have some clients who are seeing this issue as well. Is this something that can be fixed?

[potyl]

We did some research and patched gson to make sure that the annotation would not use value and used a dedicated name for the annotation value. We basically we added a new annotation: @SerializedNamePatched(json = 'foo') vs @SerializedName('foo'). For reference code is available in https://github.com/potyl/gson/tree/booking/serialized-name-2.4 with unit tests changes too.

Turns out that this ended up causing crashes too, so the problem is not with the annotation using value.

The new crash we get:

java.lang.IncompatibleClassChangeError: Couldn't find com.google.gson.annotations.SerializedNamePatched.name
  at libcore.reflect.AnnotationAccess.toAnnotationInstance(AnnotationAccess.java:659)
  at libcore.reflect.AnnotationAccess.toAnnotationInstance(AnnotationAccess.java:641)
  at libcore.reflect.AnnotationAccess.getDeclaredAnnotation(AnnotationAccess.java:170)
  at java.lang.reflect.Field.getAnnotation(Field.java:242)
  at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getFieldName(ReflectiveTypeAdapterFactory.java:79)
  at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getFieldNames(ReflectiveTypeAdapterFactory.java:72)
  at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:167)
  at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:108)
  at com.google.gson.Gson.getAdapter(Gson.java:360)
  at com.google.gson.internal.bind.CollectionTypeAdapterFactory.create(CollectionTypeAdapterFactory.java:52)
  at com.google.gson.Gson.getAdapter(Gson.java:360)
  at com.google.gson.Gson.fromJson(Gson.java:813)
  at com.google.gson.Gson.fromJson(Gson.java:779)
  at com.google.gson.Gson.fromJson(Gson.java:728)

TL;DR the problem is not with the annotation using value but with the loading of the annotation.

[swankjesse]

Likely a build tools problem. Using ProGuard or similar? Those tools wreck your code.

[cuongthai]

I turned off ProGuard but it's still a problem. It's all affected Samsung 5.0 Devices

[amadofelipe]

It looks like only Samsung Android 5 devices have this issue indeed