OpenShift: Java maven build "Generic Build failure" but log shows no error

I am building a maven project on OpenShift Dedicated with S2I, but the build fails with a "Generic Build failure - check logs for details."

However, the build log shows no error.

Why is this build failing?

Check the limits as @Graham suggested, by:

oc -n yourproject get limits -o yaml
oc -n yourproject get quota -o yaml

Or even go straight to edit:

oc -n yourproject edit limits

# Please edit the object below. Lines beginning with a '#' will be ignored,
# and an empty file will abort the edit. If an error occurs while saving this file will be
# reopened with the relevant failures.
#
apiVersion: v1
kind: LimitRange
metadata:
  creationTimestamp: 1999-08-11T13:58:34Z
  name: resource-limits
  namespace: yourproject
  resourceVersion: "61912526"
  selfLink: /api/v1/namespaces/betvictor/limitranges/resource-limits
  uid: 2a275347-7e9d-11e7-8242-005056957160
spec:
  limits:
  - max:
      memory: 3001Mi
    min:
      memory: 10Mi
    type: Pod
  - default:
      memory: 300Mi
    defaultRequest:
      memory: 250Mi
    max:
      memory: 3000Mi
    min:
      memory: 10Mi
    type: Container

Pay attention to the units, better if they are the same for each entry. Pod maximum has to be equal or more than the container max.

Half a gig for building a java app is not much for what I can tell...