Nicolas Fraison created HDFS-13295:
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Summary: Namenode doesn't leave safemode if
dfs.namenode.safemode.replication.min set < dfs.namenode.replication.min
Key: HDFS-13295
URL: https://issues.apache.org/jira/browse/HDFS-13295
Project: Hadoop HDFS
Issue Type: Bug
Components: namenode
Environment: CDH 5.11 with HDFS-8716 backported.
dfs.namenode.replication.min=2
dfs.namenode.safemode.replication.min=1
Reporter: Nicolas Fraison
When we set dfs.namenode.safemode.replication.min <
dfs.namenode.replication.min from HDFS-8716 patch the number of replica for
which it will increase the safe block count
must be equal to dfs.namenode.safemode.replication.min in
`FSNamesystem.incrementSafeBlockCount`
When reading modification from edits, the replica number for new blocks is set
at min(numNodes,
dfs.namenode.replication.min) in BlockManager.completeBlock which is greater
than dfs.namenode.safemode.replication.min.
Due to that safe block count never reach number of available blocks and
namenode doesn't leave automatically the safemode
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