JsonDecodingException

[brianwernick]

We are currently seeing an intermittent crash when the SDK is fetching flags in 1.11.1

Information

• SDK 1.11.1
• Manufacturers [Samsung, Motorola, Xiaomi, Asus, etc.]
• OS Versions [11, 12, 13]

Stack Trace

Fatal Exception: kotlinx.serialization.json.internal.JsonDecodingException: Unexpected JSON token at offset 0: Expected start of the array '[', but had 'c' instead at path: $
JSON input: connection failure
       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:598)
       at kotlinx.serialization.json.internal.AbstractJsonLexer.fail$default(AbstractJsonLexer.kt:596)
       at kotlinx.serialization.json.internal.AbstractJsonLexer.fail$kotlinx_serialization_json(AbstractJsonLexer.kt:233)
       at kotlinx.serialization.json.internal.AbstractJsonLexer.fail$kotlinx_serialization_json$default(AbstractJsonLexer.kt:228)
       at kotlinx.serialization.json.internal.AbstractJsonLexer.unexpectedToken(AbstractJsonLexer.kt:225)
       at kotlinx.serialization.json.internal.StringJsonLexer.consumeNextToken(StringJsonLexer.kt:74)
       at kotlinx.serialization.json.internal.StreamingJsonDecoder.beginStructure(StreamingJsonDecoder.kt:100)
       at kotlinx.serialization.internal.AbstractCollectionSerializer.merge(CollectionSerializers.kt:29)
       at kotlinx.serialization.internal.AbstractCollectionSerializer.deserialize(CollectionSerializers.kt:43)
       at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeSerializableValue(StreamingJsonDecoder.kt:70)
       at kotlinx.serialization.json.Json.decodeFromString(Json.kt:107)
       at com.amplitude.experiment.SdkFlagApi$getFlags$2.onResponse(FlagApi.kt:80)

In a few of the crashes we see ...Expected start of the array '[', but had 'i' ('i' instead of 'c')

[tyiuhc]

@brianwernick, many thanks for raising this issue. v1.11.3 will now catch this SerializationException from flag fetches. Please let us know if the new release works for you as expected.

[brianwernick]

Awesome, thanks @tyiuhc. We'll update the version and let you know if we still see the crashes

[brianwernick]

We haven't seen any more crashes from this since we've updated, thanks again!