[jira] [Updated] (HADOOP-19557) S3A: S3ABlockOutputStream to never log/reject hflush(): calls

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

     [ https://issues.apache.org/jira/browse/HADOOP-19557?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran updated HADOOP-19557:
------------------------------------
    Component/s: fs/s3

> S3A: S3ABlockOutputStream to never log/reject hflush(): calls
> -------------------------------------------------------------
>
>                 Key: HADOOP-19557
>                 URL: https://issues.apache.org/jira/browse/HADOOP-19557
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.4.1
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Critical
>
> Parquet's GH-3204 patch uses hflush() just before close()
> this is needless and hurts write performance on hdfs.
> For s3A it will trigger a warning long (Syncable is not supported) or an actual failure if
> fs.s3a.downgrade.syncable.exceptions is false
> proposed: hflush to log at debug -only log/reject on hsync, which is the real place where semantics cannot be met



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