mukund-thakur commented on pull request #1944:
URL: https://github.com/apache/hadoop/pull/1944#issuecomment-620611177


   Also the minimum upload size check is in the SDK side and it surfaces only 
when we issue finalizeMultipartUpload(). The reason we don't get size error 
during regular upload blocks. 
   I am wondering isn't a bad design in terms for fail fast algorithm letting 
the clients wait unnecessarily knowing that it will fail eventually thus 
wasting time and compute both. Ideally S3 should have thrown error during the 
initial uploads only. 
   
   > Caused by: com.amazonaws.services.s3.model.AmazonS3Exception: Your 
proposed upload is smaller than the minimum allowed size (Service: null; Status 
Code: 0; Error Code: EntityTooSmall; Request ID: CDD4C1CEE6A29607; S3 Extended 
Request ID: 
SR0kiTM3c9GAuv9lfXH+zq5cdj04gmk6/bKIYf8V73xugfi7257Cj51qy0YITShTJXGkK6Dw6AY=), 
S3 Extended Request ID: 
SR0kiTM3c9GAuv9lfXH+zq5cdj04gmk6/bKIYf8V73xugfi7257Cj51qy0YITShTJXGkK6Dw6AY=
        at 
com.amazonaws.services.s3.model.transform.XmlResponsesSaxParser$CompleteMultipartUploadHandler.doEndElement(XmlResponsesSaxParser.java:1815)
        at 
com.amazonaws.services.s3.model.transform.AbstractHandler.endElement(AbstractHandler.java:52)
        at 
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:609)
        at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1782)
        at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2967)
        at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:602)
        at 
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:112)
        at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:505)
        at 
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:842)
        at 
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:771)
        at 
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
        at 
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
        at 
com.amazonaws.services.s3.model.transform.XmlResponsesSaxParser.parseXmlInputStream(XmlResponsesSaxParser.java:152)
        at 
com.amazonaws.services.s3.model.transform.XmlResponsesSaxParser.parseCompleteMultipartUploadResponse(XmlResponsesSaxParser.java:486)
        at 
com.amazonaws.services.s3.model.transform.Unmarshallers$CompleteMultipartUploadResultUnmarshaller.unmarshall(Unmarshallers.java:308)
        at 
com.amazonaws.services.s3.model.transform.Unmarshallers$CompleteMultipartUploadResultUnmarshaller.unmarshall(Unmarshallers.java:305)
        at 
com.amazonaws.services.s3.internal.S3XmlResponseHandler.handle(S3XmlResponseHandler.java:62)
        at 
com.amazonaws.services.s3.internal.ResponseHeaderHandlerChain.handle(ResponseHeaderHandlerChain.java:44)
        at 
com.amazonaws.services.s3.internal.ResponseHeaderHandlerChain.handle(ResponseHeaderHandlerChain.java:30)
        at 
com.amazonaws.http.response.AwsResponseHandlerAdapter.handle(AwsResponseHandlerAdapter.java:70)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.handleResponse(AmazonHttpClient.java:1627)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeOneRequest(AmazonHttpClient.java:1336)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeHelper(AmazonHttpClient.java:1113)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:770)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:744)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:726)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500(AmazonHttpClient.java:686)
        at 
com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute(AmazonHttpClient.java:668)
        at 
com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:532)
        at 
com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:512)
        at 
com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4920)
        at 
com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4866)
        at 
com.amazonaws.services.s3.AmazonS3Client.completeMultipartUpload(AmazonS3Client.java:3464)
        at 
org.apache.hadoop.fs.s3a.WriteOperationHelper.lambda$finalizeMultipartUpload$1(WriteOperationHelper.java:266)
        at org.apache.hadoop.fs.s3a.Invoker.once(Invoker.java:110)


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