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From "Karan Mehta (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7054) Make DFSOutputStream tracing more fine-grained
Date Fri, 31 Mar 2017 18:31:41 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7054?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15951461#comment-15951461

Karan Mehta commented on HDFS-7054:

bq. detach should be used here to pass responsibility to close the span to ResponseProcessor
thread when the packet is acked.
Does this mean that the {{writeTo}} span is potentially executing in a different thread? I
am trying to understand the perspective behind doing it.

bq. Throwing exception when detach is called on already detached TraceScope may be improvement
to avoid bug like this but HTrace 3 is no longer maintained.
Just FYI, I see that improvement in their master branch already now.

> Make DFSOutputStream tracing more fine-grained
> ----------------------------------------------
>                 Key: HDFS-7054
>                 URL: https://issues.apache.org/jira/browse/HDFS-7054
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, namenode
>    Affects Versions: 2.6.0
>            Reporter: Colin P. McCabe
>            Assignee: Colin P. McCabe
>             Fix For: 2.7.0
>         Attachments: HDFS-7054.001.patch, HDFS-7054.002.patch, HDFS-7054.003.patch

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