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From "Mingliang Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13345) S3Guard: Improved Consistency for S3A
Date Fri, 17 Feb 2017 08:47:43 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15871450#comment-15871450
] 

Mingliang Liu commented on HADOOP-13345:
----------------------------------------

I propose we merge from trunk again. I have fixed the conflicts so if you vote up, I'll simply
push.

{code}
commit a434d50fe4547f32de7b1fafb3c370a7123cda2d
Merge: 8b37b6a96c 02c549484a
Author: Mingliang Liu <liuml07@apache.org>
Date:   Thu Feb 16 22:38:55 2017 -0800

    Merge branch 'trunk' into HADOOP-13345

    After HADOOP-14040, we use shaded aws-sdk uber-JAR so don't have to
    bring DynamoDB dependency explicitly. However, for tests we do need the
    DynamoDBLocal dependency from its Maven repository.
{code}

I got integration tests run against us-west-1. Please confirm as this merge is major. Thanks,

{code}
Failed tests:
  ITestS3AEncryptionSSEC.testCreateFileAndReadWithDifferentEncryptionKey:60 Expected to find
'Forbidden (Service: Amazon S3; Status Code: 403;' but got unexpected exception:java.nio.file.AccessDeniedException:
s3a://mliu-s3guard/test/testCreateFileAndReadWithDifferentEncryptionKey-0800: Reopen at position
0 on s3a://mliu-s3guard/test/testCreateFileAndReadWithDifferentEncryptionKey-0800: com.amazonaws.services.s3.model.AmazonS3Exception:
Access Denied (Service: Amazon S3; Status Code: 403; Error Code: AccessDenied; Request ID:
4E0A3A7A0B2D8005), S3 Extended Request ID: ZKm3w28W57skopifj0wH5p+c8KF1NVzL7ItNG067aK6FNK9dk1kmGrykda/NI4EhtFmN1/bv60c=
	at org.apache.hadoop.fs.s3a.S3AUtils.translateException(S3AUtils.java:158)
	at org.apache.hadoop.fs.s3a.S3AInputStream.reopen(S3AInputStream.java:165)
	at org.apache.hadoop.fs.s3a.S3AInputStream.lazySeek(S3AInputStream.java:291)
	at org.apache.hadoop.fs.s3a.S3AInputStream.read(S3AInputStream.java:374)

Tests in error:
  ITestS3ACredentialsInURL.testInstantiateFromURL:86 » InterruptedIO initTable: ...
  ITestS3AFileSystemContract>FileSystemContractBaseTest.testRenameToDirWithSamePrefixAllowed:669->FileSystemContractBaseTest.rename:525
» AWSServiceIO
{code}
For failing test {{ITestS3AEncryptionSSEC}} I'm not sure it's the caused by the merge; {{ITestS3ACredentialsInURL}}
is known not supported as credentials in URL are very unsafe. {{ITestS3AFileSystemContract#testRenameToDirWithSamePrefixAllowed}}
I can pass it 2nd run.

> S3Guard: Improved Consistency for S3A
> -------------------------------------
>
>                 Key: HADOOP-13345
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13345
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: fs/s3
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>         Attachments: HADOOP-13345.prototype1.patch, s3c.001.patch, S3C-ConsistentListingonS3-Design.pdf,
S3GuardImprovedConsistencyforS3A.pdf, S3GuardImprovedConsistencyforS3AV2.pdf
>
>
> This issue proposes S3Guard, a new feature of S3A, to provide an option for a stronger
consistency model than what is currently offered.  The solution coordinates with a strongly
consistent external store to resolve inconsistencies caused by the S3 eventual consistency
model.



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