hadoop-hdfs-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Harsh J (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-4290) Expose an event listener interface in DFSOutputStreams for block write pipeline status changes
Date Mon, 16 Mar 2015 17:43:40 GMT

     [ https://issues.apache.org/jira/browse/HDFS-4290?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Harsh J resolved HDFS-4290.
---------------------------
    Resolution: Later

Specific problems/use-cases driving this need haven't been bought up in the past years. Resolving
as Later for now.

> Expose an event listener interface in DFSOutputStreams for block write pipeline status
changes
> ----------------------------------------------------------------------------------------------
>
>                 Key: HDFS-4290
>                 URL: https://issues.apache.org/jira/browse/HDFS-4290
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: hdfs-client
>    Affects Versions: 2.0.0-alpha
>            Reporter: Harsh J
>            Priority: Minor
>
> I've noticed HBase periodically polls the current status of block replicas for its HLog
files via the API presented by HDFS-826.
> It would perhaps be better for such clients if they could register a listener instead.
The listener(s) can be sent an event in case things change in the last open block (due to
DN fall but no replacement found, etc. cases). This would avoid having a periodic, parallel
looped check in such clients and be more efficient.
> Just a thought :)



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message