ClassCastException/Failed to parse JSON

[alvin0319]

General Troubleshooting

• I have checked for similar issues on the Issue-tracker.
• I have checked for PRs that might already address this issue.

Version of JDA

5.0.0-beta.21_711e4e7

Expected Behaviour

JDA should be able to parse packets from discord.

This has started happening from yesterday, and I'm constantly getting this error approximately every 30/40 minutes.

Code Example for Reproduction Steps

N/A

Code for JDABuilder or DefaultShardManagerBuilder used

val shardManager = DefaultShardManagerBuilder.createDefault(config.token)
        .injectKTX()
        .enableIntents(
            GatewayIntent.GUILD_EMOJIS_AND_STICKERS,
            GatewayIntent.MESSAGE_CONTENT,
            GatewayIntent.GUILD_VOICE_STATES
        )
        .enableCache(CacheFlag.EMOJI, CacheFlag.VOICE_STATE)
        .setGatewayEncoding(GatewayEncoding.ETF)
        .setAutoReconnect(true)
        .setAudioPool(
            Executors.newScheduledThreadPool(
                maxVirtualThreadPoolSize,
                Thread.ofVirtual().name("JDA-AudioPool-Thread-", 0).factory()
            )
        )
        .setRateLimitScheduler(
            Executors.newScheduledThreadPool(
                maxVirtualThreadPoolSize,
                Thread.ofVirtual().name("JDA-RateLimit-Thread-", 0).factory()
            )
        )
        .setEventPool(
            Executors.newThreadPerTaskExecutor(Thread.ofVirtual().name("JDA-Event-Thread-", 0).factory()),
            true
        )
        .setCallbackPool(
            Executors.newCachedThreadPool {
                Thread(it, "CallbackPool")
            },
            true
        )
        .setMemberCachePolicy(MemberCachePolicy.VOICE)
        .setHttpClientBuilder(Constant.OKHTTP_CLIENT_BUILDER)
        .setHttpClient(Constant.OKHTTP_CLIENT_BUILDER.build())
        .setLargeThreshold(50)
        .build()

Exception or Error

java.lang.ClassCastException: class java.lang.Integer cannot be cast to class java.lang.String (java.lang.Integer and java.lang.String are in module java.base of loader 'bootstrap')
    at net.dv8tion.jda.api.utils.data.etf.ExTermDecoder.unpackMap0(ExTermDecoder.java:281)
    at net.dv8tion.jda.api.utils.data.etf.ExTermDecoder.unpack0(ExTermDecoder.java:151)
    at net.dv8tion.jda.api.utils.data.etf.ExTermDecoder.unpackMap0(ExTermDecoder.java:282)
    at net.dv8tion.jda.api.utils.data.etf.ExTermDecoder.unpack0(ExTermDecoder.java:151)
    at net.dv8tion.jda.api.utils.data.etf.ExTermDecoder.unpackMap0(ExTermDecoder.java:282)
    at net.dv8tion.jda.api.utils.data.etf.ExTermDecoder.unpack0(ExTermDecoder.java:151)
    at net.dv8tion.jda.api.utils.data.etf.ExTermDecoder.unpackList0(ExTermDecoder.java:267)
    at net.dv8tion.jda.api.utils.data.etf.ExTermDecoder.unpack0(ExTermDecoder.java:152)
    at net.dv8tion.jda.api.utils.data.etf.ExTermDecoder.unpackMap0(ExTermDecoder.java:282)
    at net.dv8tion.jda.api.utils.data.etf.ExTermDecoder.unpack0(ExTermDecoder.java:151)
    at net.dv8tion.jda.api.utils.data.etf.ExTermDecoder.unpackMap0(ExTermDecoder.java:282)
    at net.dv8tion.jda.api.utils.data.etf.ExTermDecoder.unpack0(ExTermDecoder.java:151)
    at net.dv8tion.jda.api.utils.data.etf.ExTermDecoder.unpack(ExTermDecoder.java:68)
    at net.dv8tion.jda.api.utils.data.etf.ExTermDecoder.unpackMap(ExTermDecoder.java:99)
    at net.dv8tion.jda.api.utils.data.DataObject.fromETF(DataObject.java:212)
    at net.dv8tion.jda.internal.requests.WebSocketClient.handleBinary(WebSocketClient.java:1074)
    at net.dv8tion.jda.internal.requests.WebSocketClient.onBinaryMessage(WebSocketClient.java:1043)
    at com.neovisionaries.ws.client.ListenerManager.callOnBinaryMessage(ListenerManager.java:385)
    at com.neovisionaries.ws.client.ReadingThread.callOnBinaryMessage(ReadingThread.java:276)
    at com.neovisionaries.ws.client.ReadingThread.handleBinaryFrame(ReadingThread.java:996)
    at com.neovisionaries.ws.client.ReadingThread.handleFrame(ReadingThread.java:755)
    at com.neovisionaries.ws.client.ReadingThread.main(ReadingThread.java:108)
    at com.neovisionaries.ws.client.ReadingThread.runMain(ReadingThread.java:64)
    at com.neovisionaries.ws.client.WebSocketThread.run(WebSocketThread.java:45)

[freya022]

Try switching back from ETF to JSON in the meantime

[duncte123]

Chiming in with my own stack trace as well
https://duncte123.sentry.io/share/issue/e40991ef3ef94b99938dd5773b30a7c7/

builder config

[alvin0319]

It seems that JSON encoding doesn't have this error, I have running it 4 hours without these error. (although I'm not sure if it is "fixed" on discord side)

[MinnDevelopment]

This should be fixed by #2642

[MinnDevelopment]

Fixed in 5.0.0-beta.22