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From 조주일 <tjst...@kgrid.co.kr>
Subject Downgrade without downtime is not possible?
Date Wed, 22 Apr 2015 06:02:10 GMT
 
 
http://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-hdfs/HdfsRollingUpgrade.html

Rolling Upgrade, 2.4.1 to 2.6.0
Downgrade without downtime, 2.6.0 to 2.4.1
 
Downgrade without downtime is not possible? 
 
org.apache.hadoop.hdfs.server.datanode.DataNode: Reported NameNode version '2.6.0' does not
match DataNode version '2.4.1' but is within acceptable limits. Note: This is normal during
a rolling upgrade. 
 
 
 
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