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Hadoop Name Node Down
critical

Description The Hadoop NameNode service is unavailable.
Query for 5m 
>>>
	
				
					
				
			
				
					{job="hadoop-namenode"} == 0
Query Explanation

The query selects the up metric for the hadoop-namenode job and evaluates to true when its value equals 0, meaning the NameNode is not reporting as up. The alert fires whenever this condition is met, i.e., when the NameNode service is down.

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