After struggling to successfully create an ImageMosaic JDBC store, I get an error on publishing the layer from this store.
Here is the printed error:
GeoServer 2.11.2 on Docker image based on Tomcat8
Several stack exchange comments suggest it's an issue related to permissions on the particular folder - or on the process (i.e. GeoServer)
Unfortunately I can't resolve this myself even after changing permissions.
I tried it too but this doesn't solve the issue.
So I managed to get mine to work -> i had to ONLY use a folder of TIFFS (and no other geo-related files). Allow the Store to create its own properties and shapefiles etc (by simply creating the store as an image mosaic). Then I could publish. It appears to have an error when you use multiple types of files.
That's what worked for me at least.