Write preprocessing item and item prototype from prometheus exporter

[bab]

This is my pattern that is showing in prometheus exporter:

baas_retail_Samat_service_total{exception=" is not available due to the reason : Message ID: 4241791, This is for test ",} 1.0

Also I wrote follow preprocessing pattern :

baas_retail_Samat_service_total{exception=" is not available due to the reason : Message ID: ~.*,~.*"}


Also I have attached LLD macros and item prototype and follow is preprocessing in itme_prototype :

{#METRIC}{Message="{#MESSAGE}"}


This does not work and I am not sure what is the issue ?

[bab]

Would you please help me about it ?

[bab]

When I have follow pattern
jvm_gc_pause_seconds_sum{action="end of minor GC",cause="Metadata GC Threshold",} 0.071

it is working with follow preprocessing parameters in prometheus to JSON

jvm_gc_pause_seconds_sum{action="end of minor GC",cause=~".*"}


but when I have this pattern

baas_retail_Sam_service_total{exception=" is not available due to the reason : Message ID: 4241791, This is for test ",} 1.0

follow preprocessing parameters does not work

baas_retail_Sam_service_total{exception=" is not available due to the reason : Message ID: ~.*,~.*"}

What is the issue ?

[bab]

part of my issue solved with change preprocessing to : baas_retail_Samat_service_total{exception=~".*is not available due to the reason : Message ID:.*"}


but it is showing follow error for that discovery rule

Cannot create item: invalid value for preprocessing step #1: invalid pattern: {#METRIC}{Message="{#MESSAGE}"}.

Also my item prororype name : samat {#EXCEPTION} , key : SEPAM[{#NAME}.{#EXCEPTION}]
Also preprocessing for prometheus pattern is {#METRIC}{Message="{#MESSAGE}"}