[jira] [Updated] (HADOOP-18830) S3A: Cut S3 Select

["Steve Loughran (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-18830?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran updated HADOOP-18830:
------------------------------------
    Fix Version/s: 3.3.9

> S3A: Cut S3 Select
> ------------------
>
>                 Key: HADOOP-18830
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18830
>             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: 3.3.9, 3.5.0, 3.4.1
>
>
> getting s3 select to work with the v2 sdk is tricky, we need to add extra libraries to the classpath beyond just bundle.jar. we can do this but
> * AFAIK nobody has ever done CSV predicate pushdown, as it breaks split logic completely
> * CSV is a bad format
> * one-line JSON more structured but also way less efficient
> ORC/Parquet benefit from vectored IO and work spanning the cluster.
> accordingly, I'm wondering what to do about s3 select
> # cut?
> # downgrade to optional and document the extra classes on the classpath
> Option #2 is straightforward and effectively the default. we can also declare the feature deprecated.
> {code}
> [ERROR] testReadLandsatRecordsNoMatch(org.apache.hadoop.fs.s3a.select.ITestS3SelectLandsat)  Time elapsed: 147.958 s  <<< ERROR!
> java.io.IOException: java.lang.NoClassDefFoundError: software/amazon/eventstream/MessageDecoder
>         at org.apache.hadoop.fs.s3a.select.SelectObjectContentHelper.select(SelectObjectContentHelper.java:75)
>         at org.apache.hadoop.fs.s3a.WriteOperationHelper.lambda$select$10(WriteOperationHelper.java:660)
>         at org.apache.hadoop.fs.store.audit.AuditingFunctions.lambda$withinAuditSpan$0(AuditingFunctions.java:62)
>         at org.apache.hadoop.fs.s3a.Invoker.once(Invoker.java:122)
> {code}



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