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https://issues.apache.org/jira/browse/HDFS-12256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16172197#comment-16172197
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Xiaoyu Yao commented on HDFS-12256:
-----------------------------------
Patch looks good to me. +1. I will commit it shortly.
> Ozone : handle inactive containers on DataNode
> ----------------------------------------------
>
> Key: HDFS-12256
> URL: https://issues.apache.org/jira/browse/HDFS-12256
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Chen Liang
> Assignee: Chen Liang
> Labels: ozoneMerge, tocheck
> Attachments: HDFS-12256-HDFS-7240.001.patch
>
>
> When a container gets created, corresponding metadata gets added to
> {{ContainerManagerImpl#containerMap}}. What {{containerMap}} stores is a
> containerName to {{ContainerStatus}} instance map. When datanode starts, it
> also loads this map from disk file metadata. As long as the containerName is
> found in this map, it is considered an existing container.
> An issue we saw was that, occasionally, when the container creation on
> datanode fails, the metadata of the failed container may still get added to
> {{containerMap}}, with active flag set to false. But currently such
> containers are not being handled, containers with active=false are just
> treated as normal containers. Then when someone tries to write to this
> container, fails can happen.
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