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Cassandra client request unavailable write
critical

Description Some Cassandra client requests are unavailable to write - {{ $labels.cassandra_cluster }}
Query for 2m 
>>>
	
				
					
					
						changes
					
				
			
				
					(
				
			
				
					
				
			
				
					{operation="write"}[1m]) > 0
Query Explanation

The rule watches the counter cassandra_client_request_unavailable_exceptions_total for write operations and uses changes(...[1m]) to see if the value increased at least once in the past minute. If any new write‑unavailable exception is recorded (i.e., the counter changes > 0), the alert fires for that Cassandra cluster.

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