The geotiff has 2880x1 blocks, and is 2880x1441, and has four overviews.
Would it possibly help to use 512x512 blocks?

On Fri, Apr 30, 2021 at 3:22 PM Devin Eyre <djey...@gmail.com> wrote:

> In the example I included, when I change the height to 880 or less, the
> problem goes away.
>
> On Fri, Apr 30, 2021 at 2:43 PM Devin Eyre <djey...@gmail.com> wrote:
>
>> I'm seeing blank parts along either the top and/or left sides when
>> requesting an image with some bounding boxes and sizes.  The layer is a
>> time-enabled imagemosaic, which is in EPSG:4326, and covers the globe at a
>> resolution of 1/8th degree resolution.  Increasing the requested area
>> slightly makes the area which was blank filled in.
>>
>> Here's a WMS call which exhibits the problem:
>>
>> http://localhost:8080/geoserver/wms?service=WMS&request=GetMap&format=application/openlayers&version=1.3.0&layers=stormgeo:Significant_Wave_Height&styles=wave_ht_meters_sig&transparent=true&crs=EPSG:3857&bbox=697492.508703977,9597913.35523451,817665.800051298,9687546.93524809&width=1271&height=948&time=2021-04-30T12:00:00.000Z
>>
>> I can provide the sld and a geotiff used for this if someone wants to
>> delve into this.
>>
>> I'm running geoserver 2.16.2 with tomcat8 on Ubuntu 16.04, using JAI:EXT
>> for all operations except Lookup because of the known issue with that one,
>> which causes a similar but worse version of this problem.  I also tried
>> running geoserver 2.18 back in January, but time-enabled imagemosaic layers
>> did not work well at all in that version.
>>
>>
>>
>>
>>
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