May 2017
Intermediate to advanced
348 pages
7h 8m
English
Content preview from Hadoop 2.x Administration CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Preserving ResourceManager states
It is important to preserve the state of ResourceManager during the restart of RM, so as to keep the application running with minimal interruptions. The concept is that the RM preserves the application state in a store and reloads it on restart. ApplicationMasters (AM) and NodeManagers continuously poll RM for status and re-register with it when available, thus resuming the containers from saved state.
Getting ready
For this recipe, you will again need a running cluster and have completed the previous recipes to make sure the cluster is working fine in terms of HDFS and YARN.
How to do it...
- Connect to the
master1.cyrus.commaster node and switch to userhadoop. - Navigate to the directory
/opt/cluster/hadoop/etc/hadoop ...
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