Production logs spinning on dotmesh container

Dotmesh production logs are full of 

```
-04-06T17:57:23.046003469Z time="2020-04-06T17:57:23Z" level=info msg="Error in runWhileFilesystemLives(pollDirty@910c1b51-d05a-4469-933c-c9c962d6076b), retrying in 1s: strconv.ParseInt: parsing \"-\": invalid syntax"

```

This not only hides genuine issues going past but also looks like a code issue that needs fixing.