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https://issues.apache.org/jira/browse/HDFS-11873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16168801#comment-16168801
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Weiwei Yang commented on HDFS-11873:
------------------------------------
Hi [~xyao]
Thanks for fixing this, this should have fixed issue. I am not familiar with
netty stuff, it might be good to have someone else to review this patch. One
thing small, when I run the test case, it seems to create following dirs/files
under {{~/hadoop/hadoop-hdfs-project/hadoop-hdfs}}
{noformat}
ls -R true/
_objects/ metadata.db/ user.db/
true//_objects:
true//metadata.db:
000003.log CURRENT IDENTITY LOCK LOG
MANIFEST-000001 OPTIONS-000005
true//user.db:
000003.log CURRENT IDENTITY LOCK LOG
MANIFEST-000001 OPTIONS-000005
{noformat}
any idea why?
> 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.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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