Cassandra client request unavailable read critical
Some Cassandra client requests are unavailable to read - {{ $labels.cassandra_cluster }}
>>>
changes
(
{operation="read"}[1m]) > 0
The query changes(cassandra_client_request_unavailable_exceptions_total{operation="read"}[1m]) > 0 looks at the cassandra_client_request_unavailable_exceptions_total counter for read operations and counts how many times its value changed in the past minute. If the counter increased at least once (i.e., any read request resulted in an unavailable exception), the expression evaluates to true and the alert fires.
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