Java 成功完成部件后，S3多部件上传在完成时失败

我正在尝试将动态生成的数据从内存上传到S3

以下是实际上传部件的代码：

UploadPartRequest partReq = new UploadPartRequest()
    .withBucketName( this.getBucket() )
    .withKey( this.getKey() )
    .withUploadId( uploadId )
    .withPartNumber( partNumber )
    .withPartSize( partSize )
    .withInputStream( is )
    .withGeneralProgressListener( (ProgressEvent e) -> {
            log.info( "{} {} {} {} {} {} bytes transferred",
            this.getBucket(), this.getKey(), uploadId, partNumber,
            e.getEventType(), e.getBytesTransferred() );
    });
UploadPartResult partRes = this.getClient().uploadPart( partReq );

在上传完所有部分后，我的日志中会出现以下行，我认为这意味着所有上传部分都已成功上传

1 TRANSFER_PART_COMPLETED_EVENT 
2 TRANSFER_PART_COMPLETED_EVENT 
3 TRANSFER_PART_COMPLETED_EVENT 
4 TRANSFER_PART_COMPLETED_EVENT 
5 TRANSFER_PART_COMPLETED_EVENT 
6 TRANSFER_PART_COMPLETED_EVENT 
7 TRANSFER_PART_COMPLETED_EVENT 
8 TRANSFER_PART_COMPLETED_EVENT 
9 TRANSFER_PART_COMPLETED_EVENT 
10 TRANSFER_PART_COMPLETED_EVENT
11 TRANSFER_PART_COMPLETED_EVENT
12 TRANSFER_PART_COMPLETED_EVENT
13 TRANSFER_PART_COMPLETED_EVENT
14 TRANSFER_PART_COMPLETED_EVENT
15 TRANSFER_PART_COMPLETED_EVENT
17 TRANSFER_PART_COMPLETED_EVENT
16 TRANSFER_PART_COMPLETED_EVENT

当上传部分还在上传的时候，下面这一行也出现了很多次，这告诉我它确实在为那些上传发送数据

REQUEST_BYTE_TRANSFER_EVENT 8192 bytes transferred

这是我用来完成整个上传过程的代码

CompleteMultipartUploadRequest cmpur = new CompleteMultipartUploadRequest()
    .withBucketName( this.getBucket() )
    .withKey( this.getKey() )
    .withUploadId( result.getUploadId() )
    .withPartETags( new ArrayList<>( this.getUploadPartResults() ) )
    .withGeneralProgressListener((e) -> {
        log.info( "{} {} {} {} bytes transferred",
        this.getBucket(), this.getKey(),
        e.getEventType(), e.getBytesTransferred() );
    });
this.getClient().completeMultipartUpload( cmpur );

然后线就挂在那里了

我假设客户端请求失败事件意味着整个上传失败。我错过了什么

我尝试增加部分大小，以便在整个多部分上传中只有一个上传的部分，这是成功的。如果总零件数大于1，则失败

以下是当它只有一个部分时成功上传的日志

REQUEST_CONTENT_LENGTH_EVENT 0 bytes transferred
CLIENT_REQUEST_STARTED_EVENT 0 bytes transferred
HTTP_REQUEST_STARTED_EVENT 0 bytes transferred
HTTP_REQUEST_COMPLETED_EVENT 0 bytes transferred
RESPONSE_CONTENT_LENGTH_EVENT 0 bytes transferred
HTTP_RESPONSE_STARTED_EVENT 0 bytes transferred
RESPONSE_BYTE_TRANSFER_EVENT 309 bytes transferred
HTTP_RESPONSE_COMPLETED_EVENT 0 bytes transferred
CLIENT_REQUEST_SUCCESS_EVENT 0 bytes transferred
REQUEST_BYTE_TRANSFER_EVENT 135 bytes transferred

---

也许，我还可以在日志中添加什么内容来查看出了什么问题？

我发现这是因为我的部件实际上小于所需的最小大小（5MB）

我已经读了好几遍了，但还是忽略了它。这很容易被忽视。日志也没用

REQUEST_CONTENT_LENGTH_EVENT 0 bytes transferred
CLIENT_REQUEST_STARTED_EVENT 0 bytes transferred
HTTP_REQUEST_STARTED_EVENT 0 bytes transferred
HTTP_REQUEST_COMPLETED_EVENT 0 bytes transferred
RESPONSE_CONTENT_LENGTH_EVENT 0 bytes transferred
HTTP_RESPONSE_STARTED_EVENT 0 bytes transferred
RESPONSE_BYTE_TRANSFER_EVENT 309 bytes transferred
HTTP_RESPONSE_COMPLETED_EVENT 0 bytes transferred
CLIENT_REQUEST_SUCCESS_EVENT 0 bytes transferred
REQUEST_BYTE_TRANSFER_EVENT 135 bytes transferred