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How to set heartbeat in Hadoop?

+1 vote
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I have two machine,one is master and another is slave, I want to know how to configure heartbeat of hadoop 2.2.0,which file will be modified?

posted Feb 27, 2014 by Tarun Singhal

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1 Answer

+1 vote

In hdfs-site.xml DFS.HEARTBEAT.INTERVAL parameter determines datanode heartbeat interval in seconds. Please have look these variables this parameter also DFS.NAMENODE.STALE.DATANODE.INTERVAL

answer Feb 27, 2014 by Amit Mishra
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+1 vote

The hadoop document suggests that the following variables be set inorder for Hadoop to prioritize the client jars over the Hadoop jars , however , I am not sure how to set them can someone please tell me how to set these .

HADOOP_USER_CLASSPATH_FIRST=TRUE and HADOOP_CLASSPATH=...:hadoop-examples-1.x.x.jar to run their target examples jar, and add the following configuration in mapred-site.xml to make the processes in YARN containers pick this jar as well.

http://hadoop.apache.org/docs/current/hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapReduce_Compatibility_Hadoop1_Hadoop2.html

+2 votes

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Would anyone here be willing to walk me through setting this stuff up on Amazon Web Services?

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Please help..

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