Cannot read Json element because of unexpected end of the input

[blackwiz4rd]

Hello,
I've had two decode issues in our production app. I'm not sure how they got triggered (the conditions under which the issue happened). However, this happened only on Redmi Note 9 Pro for 7 and 5 events on same user.

          Fatal Exception: kotlinx.serialization.json.internal.JsonDecodingException: Cannot read Json element because of unexpected end of the input at path: $
JSON input: 
       at kotlinx.serialization.SerializationException.<init>(SerializationException.java:51)
       at kotlinx.serialization.json.internal.JsonException.<init>(JsonException.java:16)
       at kotlinx.serialization.json.internal.JsonDecodingException.<init>(JsonDecodingException.java:21)
       at kotlinx.serialization.json.internal.JsonExceptionsKt.JsonDecodingException(JsonExceptions.kt:24)
       at kotlinx.serialization.json.internal.JsonExceptionsKt.JsonDecodingException(JsonExceptions.kt:32)
       at kotlinx.serialization.json.internal.AbstractJsonLexer.fail(AbstractJsonLexer.kt:580)
       at kotlinx.serialization.json.internal.AbstractJsonLexer.fail$default(AbstractJsonLexer.kt:578)
       at kotlinx.serialization.json.internal.JsonTreeReader.read(JsonTreeReader.java:107)
       at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeJsonElement(StreamingJsonDecoder.kt:50)
       at kotlinx.serialization.json.JsonElementSerializer.deserialize(JsonElementSerializers.kt:50)
       at kotlinx.serialization.json.JsonElementSerializer.deserialize(JsonElementSerializers.kt:27)
       at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeSerializableValue(StreamingJsonDecoder.kt:69)
       at kotlinx.serialization.json.internal.JsonStreamsKt.decodeByReader(JsonStreams.kt:111)
       at kotlinx.serialization.json.io.IoStreamsKt.decodeFromSource(IoStreams.kt:63)
       at io.github.xxfast.kstore.file.extensions.VersionedCodec.decode(VersionedCodec.java:92)
       at io.github.xxfast.kstore.KStore$read$2.invokeSuspend(KStore.kt:62)
       at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
       at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:101)
       at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.java:113)
       at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:89)
       at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.java:589)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:823)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:720)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:707)
        

Fatal Exception: kotlinx.serialization.json.internal.JsonDecodingException: Cannot read Json element because of unexpected end of the input at path: $
JSON input: 
       at kotlinx.serialization.SerializationException.<init>(SerializationException.java:51)
       at kotlinx.serialization.json.internal.JsonException.<init>(JsonException.java:16)
       at kotlinx.serialization.json.internal.JsonDecodingException.<init>(JsonDecodingException.java:21)
       at kotlinx.serialization.json.internal.JsonExceptionsKt.JsonDecodingException(JsonExceptions.kt:24)
       at kotlinx.serialization.json.internal.JsonExceptionsKt.JsonDecodingException(JsonExceptions.kt:32)
       at kotlinx.serialization.json.internal.AbstractJsonLexer.fail(AbstractJsonLexer.kt:580)
       at kotlinx.serialization.json.internal.AbstractJsonLexer.fail$default(AbstractJsonLexer.kt:578)
       at kotlinx.serialization.json.internal.JsonTreeReader.read(JsonTreeReader.java:107)
       at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeJsonElement(StreamingJsonDecoder.kt:50)
       at kotlinx.serialization.json.JsonElementSerializer.deserialize(JsonElementSerializers.kt:50)
       at kotlinx.serialization.json.JsonElementSerializer.deserialize(JsonElementSerializers.kt:27)
       at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeSerializableValue(StreamingJsonDecoder.kt:69)
       at kotlinx.serialization.json.internal.JsonStreamsKt.decodeByReader(JsonStreams.kt:111)
       at kotlinx.serialization.json.io.IoStreamsKt.decodeFromSource(IoStreams.kt:63)
       at io.github.xxfast.kstore.file.extensions.VersionedCodec.decode(VersionedCodec.java:92)
       at io.github.xxfast.kstore.KStore$read$2.invokeSuspend(KStore.kt:62)
       at io.github.xxfast.kstore.KStore$read$2.invoke(KStore.kt:12)
       at io.github.xxfast.kstore.KStore$read$2.invoke(KStore.kt:12)
       at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndispatchedOrReturn(Undispatched.kt:42)
       at kotlinx.coroutines.BuildersKt__Builders_commonKt.withContext(BuildersKt__Builders_common.kt:164)
       at kotlinx.coroutines.BuildersKt.withContext(Builders.kt:1)
       at io.github.xxfast.kstore.KStore.read(KStore.kt:60)
       at io.github.xxfast.kstore.KStore.get(KStore.kt:80)

[xxfast]

Hi @blackwiz4rd

Apologies for the delayed response

The file may have become corrupted during a write operation. Currently, the store doesn't reattempt to write if the original coroutine context is cancelled.

[blackwiz4rd]

Hello,
I'm also having this early crash at startup. Not sure how it could be solved. Do you need any additional info?

Fatal Exception: kotlinx.serialization.json.internal.JsonDecodingException: Unexpected JSON token at offset 0: Expected numeric literal at path: $
JSON input: 
       at kotlinx.serialization.SerializationException.<init>(SerializationException.java:51)
       at kotlinx.serialization.json.internal.JsonException.<init>(JsonException.java:16)
       at kotlinx.serialization.json.internal.JsonDecodingException.<init>(JsonDecodingException.java:21)
       at kotlinx.serialization.json.internal.JsonExceptionsKt.JsonDecodingException(JsonExceptions.kt:24)
       at kotlinx.serialization.json.internal.JsonExceptionsKt.JsonDecodingException(JsonExceptions.kt:32)
       at kotlinx.serialization.json.internal.AbstractJsonLexer.fail(AbstractJsonLexer.kt:580)
       at kotlinx.serialization.json.internal.AbstractJsonLexer.fail$default(AbstractJsonLexer.kt:578)
       at kotlinx.serialization.json.internal.AbstractJsonLexer.consumeNumericLiteral(AbstractJsonLexer.kt:646)
       at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeInt(StreamingJsonDecoder.kt:297)
       at kotlinx.serialization.internal.IntSerializer.deserialize(Primitives.kt:96)
       at kotlinx.serialization.internal.IntSerializer.deserialize(Primitives.kt:92)
       at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeSerializableValue(StreamingJsonDecoder.kt:69)
       at kotlinx.serialization.json.internal.JsonStreamsKt.decodeByReader(JsonStreams.kt:111)
       at kotlinx.serialization.json.io.IoStreamsKt.decodeFromSource(IoStreams.kt:63)
       at io.github.xxfast.kstore.file.extensions.VersionedCodec.decode(VersionedCodec.java:69)
       at io.github.xxfast.kstore.KStore$read$2.invokeSuspend(KStore.kt:62)
       at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
       at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:101)
       at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.java:113)
       at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:89)
       at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.java:589)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:823)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:720)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:707)
        

[blackwiz4rd]

A possible solution to the crash might be this (in case file does not exist yet)

 val userSettings = runCatching {
  kStoreDbIface.userSettings.get()
}.getOrElse {
  null
}

[championswimmer]

I am maintaining a fork these days (since this one is not getting updated)
https://github.com/championswimmer/kstore

I will look into this and fix this.