Helm release v1.4.0 moved the Querier from a Deployment to a StatefulSet.

The old deployment mounted an empty dir to /parseable/staging:

This was removed from the new STS and thus on systems with readOnlyRootFilesystem set, the querier crashes on startup with a rather obscure error message:

Error: IO Error: Permission denied (os error 13) Caused by: Permission denied (os error 13) 

Affected versions

Helm release v1.4.0