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https://issues.apache.org/jira/browse/HADOOP-14023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15840023#comment-15840023
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Sean Mackrory commented on HADOOP-14023:
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Currently, either the region gets explicitly specified when creating the
DynamoDB client (having been inferred from the S3 bucket) - and then you don't
have this problem to begin with, or the region that gets inferred from the
endpoint is only used in log and exception messages. So the only thing that
happens is the user sees messages about "region dynamodb".
> S3Guard: DynamoDBMetadataStore logs nonsense region
> ---------------------------------------------------
>
> Key: HADOOP-14023
> URL: https://issues.apache.org/jira/browse/HADOOP-14023
> Project: Hadoop Common
> Issue Type: Sub-task
> Affects Versions: HADOOP-13345
> Reporter: Sean Mackrory
> Assignee: Sean Mackrory
> Priority: Minor
> Attachments: HADOOP-14023-HADOOP-13345.001.patch
>
>
> When you specify a DynamoDB endpoint instead of it using the same one as the
> S3 bucket, it thinks the region is "dynamodb":
> {code}
> > bin/hadoop s3a init -m dynamodb://region-test
> 2017-01-25 11:41:28,006 INFO s3guard.S3GuardTool: create metadata store:
> dynamodb://region-test scheme: dynamodb
> 2017-01-25 11:41:28,116 WARN util.NativeCodeLoader: Unable to load
> native-hadoop library for your platform... using builtin-java classes where
> applicable
> 2017-01-25 11:41:29,421 INFO s3guard.DynamoDBMetadataStore: Creating
> non-existent DynamoDB table region-test in region dynamodb
> 2017-01-25 11:41:34,637 INFO s3guard.S3GuardTool: Metadata store
> DynamoDBMetadataStore{region=dynamodb, tableName=region-test} is initialized.
> {code}
> My guess is it's because of DynamoDBMetadataStore.initialize will call
> getEndpointPrefix, and all the published endpoints for DynamoDB actually
> start with dynamodb.
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