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https://issues.apache.org/jira/browse/HADOOP-14081?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15871711#comment-15871711
 ] 

Rajesh Balamohan commented on HADOOP-14081:
-------------------------------------------

Thanks [~ste...@apache.org].  Here are the test results (region: S3 bucket in 
U.S east. Tests were run from my laptop). Errors are due to socket time outs 
(180 seconds). Checked ITestS3AContractGetFileStatus.teardown, which was again 
due to socket timeout.

{noformat}
Results :

Tests in error:
  
ITestS3ContractOpen>AbstractFSContractTestBase.setup:193->AbstractFSContractTestBase.mkdirs:338
 » SocketTimeout
  
ITestS3AContractGetFileStatus.teardown:40->AbstractFSContractTestBase.teardown:204->AbstractFSContractTestBase.deleteTestDirInTeardown:213
 »
  
ITestS3AContractRootDir>AbstractContractRootDirectoryTest.testRmEmptyRootDirNonRecursive:116
 » PathIO
  
ITestS3NContractOpen>AbstractFSContractTestBase.setup:193->AbstractFSContractTestBase.mkdirs:338
 » SocketTimeout

Tests run: 454, Failures: 0, Errors: 4, Skipped: 56

..
..
[INFO] Total time: 02:11 h 
{noformat}

> S3A: Consider avoiding array copy in S3ABlockOutputStream (ByteArrayBlock)
> --------------------------------------------------------------------------
>
>                 Key: HADOOP-14081
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14081
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>            Reporter: Rajesh Balamohan
>            Assignee: Rajesh Balamohan
>            Priority: Minor
>         Attachments: HADOOP-14081.001.patch
>
>
> In {{S3ADataBlocks::ByteArrayBlock}}, data is copied whenever {{startUpload}} 
> is called. It might be possible to directly access the byte[] array from 
> ByteArrayOutputStream. 
> Might have to extend ByteArrayOutputStream and create a method like 
> getInputStream() which can return ByteArrayInputStream.  This would avoid 
> expensive array copy during large upload.



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