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		05-17-2023
	
		
		08:09 PM
	
	
	
	
	
	
	
	
	
	
	
	
	
	
		
	
				
		
			
					
				
		
	
		
					
							 Hi All,    I would like to know what is heap value that I need to set for SNN ?    I have a big cluster with ~600 nodes and ~150M blocks so I had set NN heap to be 150GB but what value should I keep for SNN ?    Currently its running with 8GB, I feel its low as it needs more MEM to perform checkpointing.     Each hosts are running with 750GB of MEM.    Please suggest. 
						
					
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		05-02-2023
	
		
		06:43 PM
	
	
	
	
	
	
	
	
	
	
	
	
	
	
		
	
				
		
			
					
				
		
	
		
					
							 Hi Brian,    Hope the /opt file system permissions are correct. Also make sure you got enough space.  [Errno 2] No such file or directory: '/opt/cloudera/parcels/CDH-7.1.8-1.cdh7.1.8.p0.30990532/    
						
					
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		03-02-2021
	
		
		08:32 AM
	
	
	
	
	
	
	
	
	
	
	
	
	
	
		
	
				
		
			
					
				
		
	
		
					
							 Hi All,    I had similar issue, while building new cluster and enabling HA. Both NN were is standby and error in NN log {1}.    Fix was in CM, we need to "Initialize HA state in ZK" under "Federation and High Availability. There then restart cluster.    {1}Caused by: java.net.ConnectException: Call From <NN1> to <NN2>:8022 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused 
						
					
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