I need to group multiple geotiff raster layers together. Each layer works well on its own when being previewed through the "Layer preview" utility.
However, when I group the layers together through the "Layer Groups" utility, the created grouped layer is previewed as an empty/white layer.
I am a bit suspicious that the problem lies in the coverage band details (palette_index). I am a web developer who is trying to integrate the layers in a website and therefore I don't have an experience in what does the coverage band details exactly mean.
I am attaching the configuration screen of two of the tiff files I am referring to.
Update 1: I have now pasted the geoserver log, does this show a memory related issue? One line says: 2015-10-25 06:02:42,864 ERROR [geotools.map] - Call MapContent dispose() to prevent memory leaks. You can view the log of 1000 lines here: http://jpst.it/CFPL