Ahmar Suhail created HADOOP-18382:
-------------------------------------

             Summary: Upgrade AWS SDK to V2 - Prerequisites 
                 Key: HADOOP-18382
                 URL: https://issues.apache.org/jira/browse/HADOOP-18382
             Project: Hadoop Common
          Issue Type: Sub-task
            Reporter: Ahmar Suhail


We want to update the AWS SDK to V2, before we do this we should warn on things 
that will no longer supported. The following changes should be made:

 
 * 
[getAmazonS3Client()|https://github.com/apache/hadoop/blob/221eb2d68d5b52e4394fd36cb30d5ee9ffeea7f0/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AFileSystem.java#L1174]
 - Warn that this method will be removed 
 * 
[initCustomSigners()|https://github.com/apache/hadoop/blob/03cfc852791c14fad39db4e5b14104a276c08e59/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/auth/SignerManager.java#L65]
 - Warn that the interface is changing, any custom signers will need to be 
updated

 * 
[bindAWSClient|https://github.com/apache/hadoop/blob/trunk/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AFileSystem.java#L840]
 - If DT is enabled, warn that credential providers interface is changing, any 
custom cred providers used in binding classes will need to be updated?
 *  
[buildAWSProviderList|https://github.com/apache/hadoop/blob/trunk/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AUtils.java#L618]
 - if any SDK V1 cred providers are in this list, warn that these will be 
removed?
 * 
[S3ClientFactory|https://github.com/apache/hadoop/blob/221eb2d68d5b52e4394fd36cb30d5ee9ffeea7f0/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3ClientFactory.java]
 - Update javadocs to say this interface will be replaced by a V2 client 
factory, mark interface deprecated? 



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