devinbost removed a comment on issue #7489:
URL: https://github.com/apache/pulsar/issues/7489#issuecomment-656871407


   @matthewfollegot 
   Since we're using the Prometheus Counter's internal state to keep track of 
our exceptions, every time an exception is thrown, we're still adding the 
exception to the Counter, aren't we?
   e.g. 
https://github.com/apache/pulsar/blob/02bf9a0b770e53f5a6f3810e9602ccc9a4c05050/pulsar-functions/instance/src/main/java/org/apache/pulsar/functions/instance/stats/FunctionStatsManager.java#L293
   
   If I'm not mistaken, even if we omit the timestamp, wouldn't we still need 
to check if that exception has been thrown recently and filter new writes 
(unless we change how we're tracking that information) to prevent the new 
exception from perpetuating the same issue?
   If that's true and we need to filter new writes, then unless we periodically 
reset the exceptions (which we might already do), we could end up with new 
exceptions being suppressed inadvertently because they match old exceptions. 
There's a difference between an exception that occurs once a day and an 
exception that occurs with every method call, so we'd need a way to distinguish 
between them. 


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