Couchbase module throws json parse exception on basicStats.opsPerSec

Elastic Stack Beats
1

I am trying to use Metricbeats couchbase module. I keep getting the below error

Error: %!(EXTRA *json.UnmarshalTypeError=json: cannot unmarshal number 790.2097902097902 into Go struct field BucketBasicStats.opsPerSec of type int64)

I did some research and I see that there is an issue in the below code
[https://github.com/elastic/beats/blob/master/metricbeat/module/couchbase/bucket/data.go]

The metricbeat couchbase module has defined BucketBasicStats Struct as:

type BucketBasicStats struct {
QuotaPercentUsed float64 json:"quotaPercentUsed"
OpsPerSec int64 json:"opsPerSec"
DiskFetches int64 json:"diskFetches"
ItemCount int64 json:"itemCount"
DiskUsed int64 json:"diskUsed"
DataUsed int64 json:"dataUsed"
MemUsed int64 json:"memUsed"
}

It is making an assumption that OpsPerSec is an int64 where as it really is a float. Couchbase API pools/default/buckets always returns this field as a float (unless it is 0 !!). Looking at their APIs, they haven't really indicated that this field is an int. This should be a simple enough fix to change the field from int to float in the above module.

2

Could you please open an issue on GH referencing this post? Also, if you feel like it we are happy to review your PR if you provide a fix.

3

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