Errors showing up with metricbeats and mongodb 3.4

[ctindel]

I'm running with metricbeats 5.0 and mongodb 3.4 and seeing these errors in the metricbeat logs file. For example, if you're using the wiredtiger storage engine (which was added in mongodb 3.0 but became default in 3.2 then there is backgroundFlushing server statistic, that only exists with the mmapv1 storage engine).

I think these just need some love to update for newer mongodb metric and deal with conditional metrics that may not existed in various mongodb configs.

https://docs.mongodb.com/manual/reference/command/serverStatus/

2016-11-13T03:57:36Z ERR Error accessing sub-dictionary backgroundFlushing
2016-11-13T03:57:36Z ERR Error accessing sub-dictionary dur
2016-11-13T03:57:36Z ERR Error on field 'bytes': Key not found
2016-11-13T03:57:36Z ERR Error on field 'write_backs_queued': Key not found
2016-11-13T03:57:46Z ERR Error accessing sub-dictionary backgroundFlushing
2016-11-13T03:57:46Z ERR Error accessing sub-dictionary dur
2016-11-13T03:57:46Z ERR Error on field 'bytes': Key not found
2016-11-13T03:57:46Z ERR Error on field 'write_backs_queued': Key not found
2016-11-13T03:57:56Z ERR Error accessing sub-dictionary backgroundFlushing
2016-11-13T03:57:56Z ERR Error accessing sub-dictionary dur
2016-11-13T03:57:56Z ERR Error on field 'write_backs_queued': Key not found
2016-11-13T03:57:56Z ERR Error on field 'bytes': Key not found

[Zhomart]

Same with mongodb 3.2.9. As Rufin pointed out, it seems like quite a few of the statistics fields were removed or moved.