Unable to create instance of class com.pengrad.telegrambot.model.Video since 8.3.0

[rob93c]

Hello all,
I'm using the library in my Telegram bot and after upgrading to 8.3.0, the bot is unable to process video files.

Please refer to this pull request, I'm testing against this branch: https://github.com/Stickerifier/Stickerify/pull/333/files

For instance, sending the bot this video results in the following error:

[01/03/2025 18:57:50.333 CET] ERROR [OkHttp https://api.telegram.org/...] Stickerify - There was an unexpected failure: java.io.IOException: java.lang.RuntimeException: Unable to create instance of class com.pengrad.telegrambot.model.Video. Registering an InstanceCreator or a TypeAdapter for this type, or adding a no-args constructor may fix this problem.

[mircoianese]

Hello,

I'm not able to reproduce. In my code the Video object is correctly parsed:

Can you please share the code snippet where the exception is thrown? Or the crash is even before the Update is parsed by the library?
Thank you

[rob93c]

Hi @mircoianese, thanks for promptly looking into this.
I confirm the bot is crashing before the Update is parsed; I noticed I have it work properly when I run it from my Main class but it doesn't when I execute it via Docker.

With the Docker approach, I'm launching the bot with

CMD ["jre/bin/java", "-XX:+UseZGC", "-Dcom.sksamuel.scrimage.webp.binary.dir=/usr/local/bin/", "-jar", "Stickerify-shadow.jar"]

and it always worked as expected.

Just to add a bit more of context, the project uses Java 23 and Gradle 8.13 (although I noticed this issue also on Gradle 8.12).

Is there any other parameter I need to specify?

[rob93c]

I had a deeper check on this and I found out the root cause: in Docker I'm launching the bot using a custom JRE configured as follows:

runtime {
    options = ['--strip-debug', '--no-header-files', '--no-man-pages']
    modules = ['java.desktop', 'java.naming', 'java.sql', 'jdk.crypto.ec']
}

Running my shadow jar with this custom built JRE, results in this exception:

com.pengrad.telegrambot.TelegramException: java.io.IOException: java.lang.RuntimeException: Unable to create instance of class com.pengrad.telegrambot.model.Video. Registering an InstanceCreator or a TypeAdapter for this type, or adding a no-args constructor may fix this problem.
        at com.pengrad.telegrambot.impl.UpdatesHandler$1.onFailure(UpdatesHandler.java:96)
        at com.pengrad.telegrambot.impl.UpdatesHandler$1.onFailure(UpdatesHandler.java:54)
        at com.pengrad.telegrambot.impl.TelegramBotClient$1.onResponse(TelegramBotClient.java:59)
        at okhttp3.internal.connection.RealCall$AsyncCall.run(RealCall.kt:519)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: java.lang.RuntimeException: Unable to create instance of class com.pengrad.telegrambot.model.Video. Registering an InstanceCreator or a TypeAdapter for this type, or adding a no-args constructor may fix this problem.
        at com.pengrad.telegrambot.impl.TelegramBotClient$1.onResponse(TelegramBotClient.java:58)
        ... 4 more
Caused by: java.lang.RuntimeException: Unable to create instance of class com.pengrad.telegrambot.model.Video. Registering an InstanceCreator or a TypeAdapter for this type, or adding a no-args constructor may fix this problem. 
        at com.google.gson.internal.ConstructorConstructor.lambda$newUnsafeAllocator$18(ConstructorConstructor.java:344)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$FieldReflectionAdapter.createAccumulator(ReflectiveTypeAdapterFactory.java:552)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:505)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$2.readIntoField(ReflectiveTypeAdapterFactory.java:267)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$FieldReflectionAdapter.readField(ReflectiveTypeAdapterFactory.java:558)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:516)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$2.readIntoField(ReflectiveTypeAdapterFactory.java:267)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$FieldReflectionAdapter.readField(ReflectiveTypeAdapterFactory.java:558)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:516)
        at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
        at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:81)
        at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:61)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$2.readIntoField(ReflectiveTypeAdapterFactory.java:267)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$FieldReflectionAdapter.readField(ReflectiveTypeAdapterFactory.java:558)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:516)
        at com.google.gson.Gson.fromJson(Gson.java:1361)
        at com.google.gson.Gson.fromJson(Gson.java:1262)
        at com.google.gson.Gson.fromJson(Gson.java:1171)
        at com.google.gson.Gson.fromJson(Gson.java:1107)
        at com.pengrad.telegrambot.impl.TelegramBotClient$1.onResponse(TelegramBotClient.java:51)
        ... 4 more
Caused by: java.lang.UnsupportedOperationException: Cannot allocate class com.pengrad.telegrambot.model.Video. Usage of JDK sun.misc.Unsafe is enabled, but it could not be used. Make sure your runtime is configured correctly.   
        at com.google.gson.internal.UnsafeAllocator$4.newInstance(UnsafeAllocator.java:121)
        at com.google.gson.internal.ConstructorConstructor.lambda$newUnsafeAllocator$18(ConstructorConstructor.java:341)
        ... 23 more

The innermost exception lead me to this discussion where they stated this issue can be fixed including the module jdk.unsupported.

I confirm that, after adding that module, my bot works as expected.