Add daemon restart option
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Key: HADOOP-6915
URL: https://issues.apache.org/jira/browse/HADOOP-6915
Project: Hadoop Common
Issue Type: Improvement
Components: scripts
Reporter: Nicolas Spiegelberg
Priority: Minor
Fix For: 0.22.0, 0.20-append
With the addition of AvatarNode, we are working on a rolling restart option for
upgrading a cluster. It seems that a generic restart option would be useful
for this purpose and perhaps other administrative tasks. Add a 'restart'
option to hadoop-daemon.sh and also modify 'slaves.sh' to run operations in
parallel or serially.
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