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From "Chen Liang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12178) Ozone: OzoneClient: Handling SCM container creationFlag at client side
Date Thu, 27 Jul 2017 20:45:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16103876#comment-16103876
] 

Chen Liang commented on HDFS-12178:
-----------------------------------

Thanks [~nandakumar131] for the elaboration and updating the patch, checking {{CONTAINER_EXISTS}}
LGTM, can we move {{containersCreated.add(containerName);}} to after the try-catch clause
such that we don't need to call it two places? Also, for {{containersCreated}}, seems order
of the container name doesn't matter, only their presence, so would be it better to change
{{ArrayList}} to {{HashSet}} for the O(1) {{contains(...)}}?

> Ozone: OzoneClient: Handling SCM container creationFlag at client side
> ----------------------------------------------------------------------
>
>                 Key: HDFS-12178
>                 URL: https://issues.apache.org/jira/browse/HDFS-12178
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ozone
>            Reporter: Nandakumar
>            Assignee: Nandakumar
>         Attachments: HDFS-12178-HDFS-7240.000.patch, HDFS-12178-HDFS-7240.001.patch,
HDFS-12178-HDFS-7240.002.patch
>
>
> SCM BlockManager provisions a pool of containers upon block creation request, only one
container is returned with creationFlag to the client. The other containers provisioned in
the same batch will not have this flag. This jira is to handle that scenario at client side,
until  HDFS-11888 is fixed.



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