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MapReduce, mail # user - About connection to NameNode in NameNode-HA

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About connection to NameNode in NameNode-HA
Shinichi Yamashita 2012-11-01, 15:44

I write hdfs-site.xml of all nodes as follows in NameNode-HA.

... snip  ...
... snip ...
(nn : nameserviceID, nn1: NameNode1, nn2: NameNode2)

Is the order of connection from DFSClient to NameNode always "(1) nn1"
and "(2) nn2" ?
And will "StandbyException" messages be written in the log of nn1 If
the state of nn1 is standby?

Todd Lipcon 2012-11-01, 16:43
Shinichi Yamashita 2012-11-04, 12:24