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https://issues.apache.org/jira/browse/HADOOP-14036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15844053#comment-15844053
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Steve Loughran commented on HADOOP-14036:
-----------------------------------------
we've seen this intermittently before, not worked out what is happening.
We think that the list of keys for delete being built up has duplicates in, but
aren't sure where that's coming from.
> S3Guard: intermittent duplicate item keys failure
> -------------------------------------------------
>
> Key: HADOOP-14036
> URL: https://issues.apache.org/jira/browse/HADOOP-14036
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Reporter: Aaron Fabbri
>
> I see this occasionally when running integration tests with -Ds3guard
> -Ddynamo:
> {noformat}
> testRenameToDirWithSamePrefixAllowed(org.apache.hadoop.fs.s3a.ITestS3AFileSystemContract)
> Time elapsed: 2.756 sec <<< ERROR!
> org.apache.hadoop.fs.s3a.AWSServiceIOException: move:
> com.amazonaws.services.dynamodbv2.model.AmazonDynamoDBException: Provided
> list of item keys contains duplicates (Service: AmazonDynamoDBv2; Status
> Code: 400; Error Code: ValidationException; Request ID:
> QSBVQV69279UGOB4AJ4NO9Q86VVV4KQNSO5AEMVJF66Q9ASUAAJG): Provided list of item
> keys contains duplicates (Service: AmazonDynamoDBv2; Status Code: 400; Error
> Code: ValidationException; Request ID:
> QSBVQV69279UGOB4AJ4NO9Q86VVV4KQNSO5AEMVJF66Q9ASUAAJG)
> at
> org.apache.hadoop.fs.s3a.S3AUtils.translateException(S3AUtils.java:178)
> at
> org.apache.hadoop.fs.s3a.s3guard.DynamoDBMetadataStore.move(DynamoDBMetadataStore.java:408)
> at
> org.apache.hadoop.fs.s3a.S3AFileSystem.innerRename(S3AFileSystem.java:869)
> at
> org.apache.hadoop.fs.s3a.S3AFileSystem.rename(S3AFileSystem.java:662)
> at
> org.apache.hadoop.fs.FileSystemContractBaseTest.rename(FileSystemContractBaseTest.java:525)
> at
> org.apache.hadoop.fs.FileSystemContractBaseTest.testRenameToDirWithSamePrefixAllowed(FileSystemContractBaseTest.java:669)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAcces
> {noformat}
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