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From "Xiaoyu Yao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11873) Ozone: Object store handler cannot serve multiple requests from single http client
Date Sat, 16 Sep 2017 04:47:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16168816#comment-16168816

Xiaoyu Yao commented on HDFS-11873:

I think it is caused by some uncleaned setting of cluster configuration for local storage
root {{conf.setBoolean(OzoneConfigKeys.OZONE_LOCALSTORAGE_ROOT, true);}} for local handler.

Update patch v3 to fix the checkstyle and the asf license issue due to the wrong test root
created and left over after the test.

> Ozone: Object store handler cannot serve multiple requests from single http client
> ----------------------------------------------------------------------------------
>                 Key: HDFS-11873
>                 URL: https://issues.apache.org/jira/browse/HDFS-11873
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone
>            Reporter: Weiwei Yang
>            Assignee: Xiaoyu Yao
>            Priority: Critical
>              Labels: ozoneMerge
>         Attachments: HDFS-11873-HDFS-7240.001.patch, HDFS-11873-HDFS-7240.002.patch,
HDFS-11873-HDFS-7240.003.patch, HDFS-11873-HDFS-7240.testcase.patch
> This issue was found when I worked on HDFS-11846. Instead of creating a new http client
instance per request, I tried to reuse {{CloseableHttpClient}} in {{OzoneClient}} class in
a {{PoolingHttpClientConnectionManager}}. However, every second request from the http client
hangs, which could not get dispatched to {{ObjectStoreJerseyContainer}}. There seems to be
something wrong in the netty pipeline, this jira aims to 1) fix the problem in the server
side 2) use the pool for client http clients to reduce the resource overhead.

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