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https://issues.apache.org/jira/browse/HADOOP-16126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16779887#comment-16779887
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Tsz Wo Nicholas Sze commented on HADOOP-16126:
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Thanks [~tasanuma0829].
For this (HADOOP-16126), we may backport it to any branches since it is just a
very small and safe change.
For HADOOP-16127, let's keep it in branch-3 for the moment to let it get
stabilized.
> ipc.Client.stop() may sleep too long to wait for all connections
> ----------------------------------------------------------------
>
> Key: HADOOP-16126
> URL: https://issues.apache.org/jira/browse/HADOOP-16126
> Project: Hadoop Common
> Issue Type: Improvement
> Components: ipc
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Tsz Wo Nicholas Sze
> Priority: Major
> Fix For: 3.3.0
>
> Attachments: c16126_20190219.patch, c16126_20190220.patch,
> c16126_20190221.patch
>
>
> {code}
> //Client.java
> public void stop() {
> ...
> // wait until all connections are closed
> while (!connections.isEmpty()) {
> try {
> Thread.sleep(100);
> } catch (InterruptedException e) {
> }
> }
> ...
> }
> {code}
> In the code above, the sleep time is 100ms. We found that simply changing
> the sleep time to 10ms could improve a Hive job running time by 10x.
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