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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12702) Add an HDFS metrics sink
Date Mon, 11 Jan 2016 22:57:40 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15092885#comment-15092885
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Steve Loughran commented on HADOOP-12702:
-----------------------------------------


line 91: include the exception in the string message, please. Same elsewhere


line 114. Instead of saying "Error connecting to HDFS", say 

("error connecting to fs: " + basePath + " : " + ex, ex)

that is: the URL and path, so that you stand a chance of working out why things went wrong.
Just a thought.

> Add an HDFS metrics sink
> ------------------------
>
>                 Key: HADOOP-12702
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12702
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: metrics
>    Affects Versions: 2.7.1
>            Reporter: Daniel Templeton
>            Assignee: Daniel Templeton
>         Attachments: HADOOP-12702.001.patch
>
>
> We need a metrics2 sink that can write metrics to HDFS. The sink should accept as configuration
a "directory prefix" and do the following in {{putMetrics()}}
> * Get yyyyMMddHH from current timestamp.
> * If HDFS dir "dir prefix" + yyyyMMddHH doesn't exist, create it. Close any currently
open file and create a new file called <hostname>.log in the new directory.
> * Write metrics to the current log file.
> * If a write fails, it should be fatal to the process running the sink.



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