Invalid metric name or label mcac_hints_hints_not_stored.

[zyxep]

Hey Everyone,

On my 4.1 clusters I started to see this error:

invalid metric name or label names: {__name__="mcac_hints_hints_not_stored.10.10.10.10.7000_total", cluster="example", dc="DC2", instance="10.10.10.10", job="mcac", mcac="org.apache.cassandra.metrics.hints_service.hints_not_stored.10.10.10.10.7000", mcac_filtered="true", rack="RAC1"}

I managed to fix my scraping by adding this to the config:

     - source_labels: [ "mcac" ]
       regex: org\.apache\.cassandra\.metrics\.hints_service\.hints_not_stored\.([^\-]+)
       target_label: __name__
       replacement: mcac_hints_not_stored

[moguchev]

There is a group of metrics with this problem. So it solves all of them:

              - source_labels: [mcac]
                regex: 'org\.apache\.cassandra\.metrics\.hints_service\.([^\.]+)\.(.+)'
                target_label: __name__
                replacement: 'mcac_hints_${1}'