Todd Lipcon created HDFS-3958:
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Summary: Integrate upgrade/finalize/rollback with external journals
Key: HDFS-3958
URL: https://issues.apache.org/jira/browse/HDFS-3958
Project: Hadoop HDFS
Issue Type: Bug
Components: name-node
Affects Versions: 3.0.0
Reporter: Todd Lipcon
Currently the NameNode upgrade/rollback/finalize framework only supports local
storage. With edits being stored in pluggable Journals, this could create
certain difficulties - in particular, rollback wouldn't actually rollback the
external storage to the old state.
We should look at how to expose the right hooks to the external journal storage
to snapshot/rollback/finalize.
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