Android Amazon S3文件上传不起作用

Question

我正在尝试将sd卡上的文件上传到我的amazon s3存储桶。这是班级：

public class FileUploadDownload
{
    Context context;
    boolean transferComplete = false;
    float transferPercentage = 0;
    public FileUploadDownload(Context context)
    {
        this.context = context;
    }

    public void uploadFile(File file , String nameOfFile)
    {
        CognitoCachingCredentialsProvider credentialsProvider = new CognitoCachingCredentialsProvider(
                context,
                "cognito_identity_pool_id", // Identity Pool ID
                Regions.EU_WEST_1 // Region
        );
        AmazonS3 s3 = new AmazonS3Client(credentialsProvider);
        TransferUtility transferUtility = new TransferUtility(s3, context);
        TransferObserver observer = transferUtility.upload(
                "s3_bucket",     /* The bucket to upload to */
                nameOfFile,    /* The key for the uploaded object */
                file        /* The file where the data to upload exists */
        );
        observer.setTransferListener(new TransferListener() {
            @Override
            public void onStateChanged(int id, TransferState state) {
                Toast.makeText(context,"State changed to : "+state.toString(),Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onProgressChanged(int id, long bytesCurrent, long bytesTotal) {

              //  transferPercentage = (float)bytesCurrent/(float)bytesTotal;
                if(bytesCurrent == bytesTotal)
                {
                //    transferComplete = true;
                    Toast.makeText(context,"Upload completed!",Toast.LENGTH_SHORT).show();
                }
            }

            @Override
            public void onError(int id, Exception ex) {
                Toast.makeText(context,"Upload Unsuccessful due to `"+ex.toString(),Toast.LENGTH_LONG).show();
            }
        });
    }
}

这是我在Activity的OnCreate（）方法中实现的代码片段：

 File sdCard = Environment.getExternalStorageDirectory();
    File dir = new File (sdCard.getAbsolutePath() + "/EpisodeRecorder/User1/Episode1/User1e1p1.jpg");
    FileUploadDownload fud = new FileUploadDownload(this);
    fud.uploadFile(dir,"trialFileUpload.jpg");

这是清单的顶部：

<?xml version="1.0" encoding="utf-8"?>

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/CustomActionBarTheme" >
    <service
        android:name="com.amazonaws.mobileconnectors.s3.transferutility.TransferService"
        android:enabled="true" />
.....

我通过toasts显示所有调试消息。最初它显示“IN PROGRESS”，稍后，它显示“FAILED”错误消息“java.lang.IllegalStateException”在DEBUG LOG中它说：

10-12 21:01:01.138   1252-14041/? E/CloudSettingsConnection﹕ Connection failed : SERVER_ERROR

我无法弄清楚发生了什么。如果你能指出错误那就太棒了。或者，如果您能够确定错误是在Amazon s3 / cognito / IAM设置还是代码中，我会很高兴。谢谢！

这是要求的整个堆栈跟踪：

    javax.net.ssl.SSLException: Write error: ssl=0x60970398: I/O error during system call, Connection reset by peer
            at com.android.org.conscrypt.NativeCrypto.SSL_write(Native Method)
            at com.android.org.conscrypt.OpenSSLSocketImpl$SSLOutputStream.write(OpenSSLSocketImpl.java:731)
            at java.io.BufferedOutputStream.write(BufferedOutputStream.java:131)
            at com.android.okhttp.internal.http.HttpTransport$FixedLengthOutputStream.write(HttpTransport.java:236)
            at com.amazonaws.http.UrlHttpClient.write(UrlHttpClient.java:172)
            at com.amazonaws.http.UrlHttpClient.writeContentToConnection(UrlHttpClient.java:129)
            at com.amazonaws.http.UrlHttpClient.execute(UrlHttpClient.java:65)
            at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:353)
            at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:196)
            at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4204)
            at com.amazonaws.services.s3.AmazonS3Client.putObject(AmazonS3Client.java:1618)
            at com.amazonaws.mobileconnectors.s3.transferutility.UploadTask.uploadSinglePartAndWaitForCompletion(UploadTask.java:174)
            at com.amazonaws.mobileconnectors.s3.transferutility.UploadTask.call(UploadTask.java:74)
            at com.amazonaws.mobileconnectors.s3.transferutility.UploadTask.call(UploadTask.java:40)
            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:841)
10-13 00:37:56.427  14450-14483/? E/UploadTask﹕ Unable to execute HTTP request: Write error: ssl=0x60970398: I/O error during system call, Connection reset by peer
10-13 00:37:56.497  14450-14450/? D/UPLOAD FAIL﹕ java.lang.IllegalStateException: Transfer failed.