Chen Liang created HDFS-12256:
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Summary: Ozone : handle inactive containers on DataNode side
Key: HDFS-12256
URL: https://issues.apache.org/jira/browse/HDFS-12256
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Chen Liang
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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