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https://issues.apache.org/jira/browse/HADOOP-19205?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran reassigned HADOOP-19205:
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Assignee: Steve Loughran
> S3A initialization/close slower than with v1 SDK
> ------------------------------------------------
>
> Key: HADOOP-19205
> URL: https://issues.apache.org/jira/browse/HADOOP-19205
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.4.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.5.0, 3.4.1
>
> Attachments: Screenshot 2024-06-14 at 17.12.59.png, Screenshot
> 2024-06-14 at 17.14.33.png
>
>
> Hive QE have observed slowdown in LLAP queries due to time to create and
> close s3a filesystems instances. A key aspect of that is they keep closing
> the fs instances (HIVE-27884), but looking at the profiles, the reason things
> seem to have regressed is
> * two s3 clients are being created (sync and async)
> * these seem to take a lot of time scanning the classpath for "global
> interceptors", which is at least an O(jars) operation; #of index entries in
> the zip files may factor too.
> Proposed:
> * create async client on demand when the transfer manager is invoked
> * look at why passwords are being scanned for if
> InstanceProfileCredentialsProvider is in use...that seems slow too
> SDK wishes
> * SDK maybe allow us to turn off that scan for interceptors?
> attaching screenshots of the profile. storediag snippet:
> {code}
> [001] fs.s3a.access.key = (unset)
> [002] fs.s3a.secret.key = (unset)
> [003] fs.s3a.session.token = (unset)
> [004] fs.s3a.server-side-encryption-algorithm = (unset)
> [005] fs.s3a.server-side-encryption.key = (unset)
> [006] fs.s3a.encryption.algorithm = (unset)
> [007] fs.s3a.encryption.key = (unset)
> [008] fs.s3a.aws.credentials.provider =
> "com.amazonaws.auth.InstanceProfileCredentialsProvider" [core-site.xml]
> {code}
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