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https://issues.apache.org/jira/browse/HADOOP-18743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17723487#comment-17723487
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Steve Loughran commented on HADOOP-18743:
-----------------------------------------
ok. this is bigger than it looks if we want to cut the v1 stuff out completely
* DT code needs to move to v2 credentials (doable)
* fixup code in credential provider list needs to patch classname strings
before trying to load
* supporting third party credential providers is going to be tricky.
proposed: use v1 sdk as *provided*, with enforcement rule to restrict to a
single V1SdkSupport class, which is only instantiated when a classname is
provided which isn't a v2 credential provider. That way, you only need the v1
sdk if your own code depends on it.
> convert declarations of AWS v1 SDK EnvironmentVariableCredentialsProvider to
> v2 version
> ---------------------------------------------------------------------------------------
>
> Key: HADOOP-18743
> URL: https://issues.apache.org/jira/browse/HADOOP-18743
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Steve Loughran
> Priority: Major
>
> As I play with the v2 sdk I've cut the v1 sdk from the tools/lib and now I'm
> getting stack traces about missing class
> EnvironmentVariableCredentialsProvider
> {code}
> java.io.IOException: From option fs.s3a.aws.credentials.provider
> java.lang.ClassNotFoundException: Class
> com.amazonaws.auth.EnvironmentVariableCredentialsProvider not found
> at
> org.apache.hadoop.fs.s3a.auth.AwsCredentialListProvider.loadAWSProviderClasses(AwsCredentialListProvider.java:128)
> at
> org.apache.hadoop.fs.s3a.auth.AwsCredentialListProvider.buildAWSProviderList(AwsCredentialListProvider.java:167)
> at
> org.apache.hadoop.fs.s3a.auth.AwsCredentialListProvider.createAWSCredentialProviderSet(AwsCredentialListProvider.java:102)
> at
> org.apache.hadoop.fs.s3a.S3AFileSystem.bindAWSClient(S3AFileSystem.java:945)
> at
> org.apache.hadoop.fs.s3a.S3AFileSystem.initialize(S3AFileSystem.java:597)
> at
> org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:3595)
> at org.apache.hadoop.fs.FileSystem.access$300(FileSystem.java:171)
> at
> org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:3696)
> at
> org.apache.hadoop.fs.FileSystem$Cache.getUnique(FileSystem.java:3653)
> at org.apache.hadoop.fs.FileSystem.newInstance(FileSystem.java:608)
> at
> org.apache.hadoop.fs.store.diag.StoreDiag.executeFileSystemOperations(StoreDiag.java:753)
>
> this provider is listed in the fs.s3a.aws.credentials.provider chain
> {code}
> <property>
> <name>fs.s3a.aws.credentials.provider</name>
> <value>
> org.apache.hadoop.fs.s3a.TemporaryAWSCredentialsProvider,
> org.apache.hadoop.fs.s3a.SimpleAWSCredentialsProvider,
> com.amazonaws.auth.EnvironmentVariableCredentialsProvider,
> org.apache.hadoop.fs.s3a.auth.IAMInstanceCredentialsProvider
> </value>
> ...
> {code}
> Ideally we should remove all v1 dependencies, explicitly (here) and
> implicitly.
> maybe for the env vars, we should consider adding our own env var provider
> which could go into branch-3.3 *now* as a single patch, which can then be
> cherrypicked by anyone who wants it in older releases; the v2 version will
> work with the new api
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