Memory overflow while parsing json

[GuangNian10000]

Fatal Exception: java.lang.OutOfMemoryError Failed to allocate a 124606360 byte allocation with 50331648 free bytes and 80MB until OOM, target footprint 503225168, growth limit 536870912 com.squareup.moshi.CollectionJsonAdapter.fromJson

[JakeWharton]

Does your JSON contain a 124MiB string or something? I think an OOM here is a perfectly reasonable behavior, and it should be fully recoverable.

[GuangNian10000]

Does your JSON contain a 124MiB string or something? I think an OOM here is a perfectly reasonable behavior, and it should be fully recoverable.

The json string is very short, less than 100 in length, and only contains strings. I cannot repeat this problem. It is an online bug, how should I fix it?

DefaultIfNullFactory.java

class DefaultIfNullFactory : JsonAdapter.Factory {
override fun create(
type: Type,
annotations: MutableSet,
moshi: Moshi
): JsonAdapter<*>? {

    val delegate = moshi.nextAdapter<Any>(this, type, annotations)

    if (!annotations.isEmpty()) return null
    if (type === Boolean::class.javaPrimitiveType) return delegate
    if (type === Byte::class.javaPrimitiveType) return delegate
    if (type === Char::class.javaPrimitiveType) return delegate
    if (type === Double::class.javaPrimitiveType) return delegate
    if (type === Float::class.javaPrimitiveType) return delegate
    if (type === Int::class.javaPrimitiveType) return delegate
    if (type === Long::class.javaPrimitiveType) return delegate
    if (type === Short::class.javaPrimitiveType) return delegate
    if (type === Boolean::class.java) return delegate
    if (type === Byte::class.java) return delegate
    if (type === Char::class.java) return delegate
    if (type === Double::class.java) return delegate
    if (type === Float::class.java) return delegate
    if (type === Int::class.java) return delegate
    if (type === Long::class.java) return delegate
    if (type === Short::class.java) return delegate
    if (type === String::class.java) return delegate
  //  if (type === ArrayMap::class.java) return delegate

    return object : JsonAdapter<Any>() {

        override fun fromJson(reader: JsonReader): Any? {

            try {
                return if (reader.peek() == JsonReader.Token.BEGIN_OBJECT) {
                    delegate.fromJson(JsonReaderSkipNullValuesWrapper(reader))
                } else {
                    delegate.fromJson(reader)
                }
            }catch (e:Exception){}

            return null
        }

        override fun toJson(writer: JsonWriter, value: Any?) {
            return delegate.toJson(writer, value)
        }
    }
}

}

[JakeWharton]

It looks like the heap is wildly fragmented, but Moshi is trying to append an item to a list that it's creating which is growing in size and instantiating a 124MiB backing array. That indicates a huge JSON payload.