Devin Eyre ( 
https://osgeo-org.atlassian.net/secure/ViewProfile.jspa?accountId=6092e6aaf6c0960069d839d1
 ) *created* an issue

GeoServer ( 
https://osgeo-org.atlassian.net/browse/GEOS?atlOrigin=eyJpIjoiZmMzZDZkODBhNTJjNDdhOGJmYWU0YzNiMDliMTdmN2IiLCJwIjoiaiJ9
 ) / Bug ( 
https://osgeo-org.atlassian.net/browse/GEOS-10052?atlOrigin=eyJpIjoiZmMzZDZkODBhNTJjNDdhOGJmYWU0YzNiMDliMTdmN2IiLCJwIjoiaiJ9
 ) GEOS-10052 ( 
https://osgeo-org.atlassian.net/browse/GEOS-10052?atlOrigin=eyJpIjoiZmMzZDZkODBhNTJjNDdhOGJmYWU0YzNiMDliMTdmN2IiLCJwIjoiaiJ9
 ) Blank parts of WMS results near upper and/or left side with certain bounding 
box coordinates and image sizes ( 
https://osgeo-org.atlassian.net/browse/GEOS-10052?atlOrigin=eyJpIjoiZmMzZDZkODBhNTJjNDdhOGJmYWU0YzNiMDliMTdmN2IiLCJwIjoiaiJ9
 )

Issue Type: Bug Affects Versions: 2.16.2 Assignee: Unassigned Components: WMS 
Created: 05/May/21 9:59 PM Environment:

Ubuntu 16.04
geoserver 2.16.2
tomcat8
JVM: Oracle Corporation: 1.8.0_201 (Java HotSpot(TM) 64-Bit Server VM)
RAM: 12 GB
Using JAI-EXT for all but Lookup operation

Priority: Medium Reporter: Devin Eyre ( 
https://osgeo-org.atlassian.net/secure/ViewProfile.jspa?accountId=6092e6aaf6c0960069d839d1
 )

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=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

By trial and error, I discovered that reducing the height to 880 or less makes 
the problem disappear.

( 
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 ) Add Comment ( 
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 )

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