If exporter is scraped by multiple Prometheuses (as we do) - Collect() could be called concurrently. In result in some cases one of Prometheuses could get pg_up = 0, because it was explicitly set to zero on first Collect call.
If exporter is scraped by multiple Prometheuses (as we do) - Collect() could be called concurrently. In result in some cases one of Prometheuses could get pg_up = 0, because it was explicitly set to zero on first Collect call.