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From "Tsuyoshi OZAWA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-11032) Replace use of Guava Stopwatch with Apache StopWatch
Date Fri, 05 Sep 2014 16:45:29 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-11032?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14123142#comment-14123142
] 

Tsuyoshi OZAWA commented on HADOOP-11032:
-----------------------------------------

[~gsteelman], thanks for your suggestions. 

{quote}
Any idea if the build scripts changed and that's the reason we can't find SpanReceiverHost?

{quote}

I think HDFS-7001 is addressing the problem.

{quote}
Second, I think a silent pass or a Log.warn() statement would suffice for StopWatch.stop()
twice in a row. 
{quote}

Do you mean should we add wrapper class of Stopwatch to handle them? It also can be overkill.
I think we should it's enough to use Stopwatch class correctly.

{quote}
And finally, if we remove the patch 3 attachment and re-upload it as patch 3 again, will Jenkins
will build with patch 3 again?
{quote}

Yes, Jenkins will :-)


> Replace use of Guava Stopwatch with Apache StopWatch
> ----------------------------------------------------
>
>                 Key: HADOOP-11032
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11032
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Gary Steelman
>            Assignee: Tsuyoshi OZAWA
>         Attachments: HADOOP-11032.1.patch, HADOOP-11032.2.patch, HADOOP-11032.3.patch
>
>
> This patch reduces Hadoop's dependency on an old version of guava. Stopwatch.elapsedMillis()
isn't part of guava past v16 and the tools I'm working on use v17. 
> To remedy this and also reduce Hadoop's reliance on old versions of guava, we can use
the Apache StopWatch (org.apache.commons.lang.time.StopWatch) which provides nearly equivalent
functionality. apache.commons.lang is already a dependency for Hadoop so this will not introduce
new dependencies. 



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