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https://issues.apache.org/jira/browse/HDFS-9924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15328850#comment-15328850
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Andrew Wang commented on HDFS-9924:
-----------------------------------
Per our bylaws, code is integrated based on consensus, and here we have not one
but multiple committers saying they do not agree with this code being present
in release branches in its current form. So, if you'd like this code to remain
in release branches, it's on you to convince us otherwise.
And per my previous comment, I'll let Vaibhav and Ashutosh comment on the Hive
usecase. I don't find tuning questions to be very relevant though until we've
at least evaluated the simple solution of a fixed size pool of 10 threads.
> [umbrella] Asynchronous HDFS Access
> -----------------------------------
>
> Key: HDFS-9924
> URL: https://issues.apache.org/jira/browse/HDFS-9924
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: fs
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Xiaobing Zhou
> Attachments: AsyncHdfs20160510.pdf
>
>
> This is an umbrella JIRA for supporting Asynchronous HDFS Access.
> Currently, all the API methods are blocking calls -- the caller is blocked
> until the method returns. It is very slow if a client makes a large number
> of independent calls in a single thread since each call has to wait until the
> previous call is finished. It is inefficient if a client needs to create a
> large number of threads to invoke the calls.
> We propose adding a new API to support asynchronous calls, i.e. the caller is
> not blocked. The methods in the new API immediately return a Java Future
> object. The return value can be obtained by the usual Future.get() method.
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