问Rxjava2 "blockingGet“导致无法解析主机:没有与主机名关联的地址

EN

Caused by java.lang.RuntimeException: java.net.UnknownHostException: Unable to resolve host "xxx": No address associated with hostname
       at io.reactivex.internal.util.ExceptionHelper.wrapOrThrow(ExceptionHelper.java:45)
       at io.reactivex.internal.observers.BlockingMultiObserver.blockingGet(BlockingMultiObserver.java:91)
       at io.reactivex.Single.blockingGet(Single.java:2492)

        List<Data> dataList = dataRepository.getDataFromApi().blockingGet();

fun getDataFromApi(): Single<List<Data>> {
    return dataService.getData()
            .map { jsonApiObject ->
                ...
                return@map data
            }
}

try {
    val data = repository!!.getData().blockingGet()
    ...
} catch (e: SocketException) {
    showNetworkErrorDialog()
}