Todd Lipcon created HDFS-3438:
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Summary: BootstrapStandby should not require a rollEdits on active
node
Key: HDFS-3438
URL: https://issues.apache.org/jira/browse/HDFS-3438
Project: Hadoop HDFS
Issue Type: Improvement
Components: ha
Affects Versions: 2.0.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Currently, BootstrapStandby uses a rollEdits() call on the active NN in order
to determine the most recent checkpoint and transaction ID. However, this means
that you cannot bootstrap a standby when the active NN is in safe mode -- i.e
you have to start the whole cluster before you can bootstrap a new standby.
This makes the workflow to convert an existing cluster to HA more complicated.
We should allow BootstrapStandby to work even when the NN is in safe mode.
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