SecondaryNameNode doCheckpoint() renames current directory before asking
NameNode to rollEditLog()
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Key: HADOOP-3745
URL: https://issues.apache.org/jira/browse/HADOOP-3745
Project: Hadoop Core
Issue Type: Bug
Components: dfs
Affects Versions: 0.19.0
Reporter: Lohit Vijayarenu
Priority: Minor
In SecondaryNameNode doCheckPoint() function invokes _startCheckpoint()_ before
calling _namenode.rollEditLog()_
_startCheckpoint()_ internally invokes _CheckpointStorage::startCheckpoint()_
which renames current to lastcheckpoint.tmp. if call to namenode failed, then
we would redo the above step renaming empty current directory in next
iteration? Should we remove after we know namenode has successfully rolled
edits?
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