com.dropbox.core.NetworkIOException: timeout

Hi,

I am facing same issue while I am downloading .zip file of 162MB

com.dropbox.core.NetworkIOException: Unable to resolve host "content.dropboxapi.com": No address associated with hostname

I am having there files 162MB, 300KB, 250MB , I made for loop to download each item

1. When I am trying to download first file I gotNetworkIOException.

2. For 2nd file it was downloaded.

3. It was downloaded but only 500KB, it did not download 250MB

Here is code I am working 

try {
    //Download file for DropBox 2
    DbxDownloader<FileMetadata> downloadData = dbxClientV2.files().download(dBoxPath);
    ouputStream = new FileOutputStream(localFile);
    downloadData.download(ouputStream);

} catch (Exception err) {
    Log.e(LOG_TAG, "Exception thrown for file at " + dBoxPath + " err msg :" + err.getMessage());
    success = false;
} finally {
    if (ouputStream != null) {
        ouputStream.close();
    }
}

NetworkIOException might be issue in Internet. But why it was downloaded only 500KB instead of 250MB. Please suggest me 

Thanks