Bruce Wallin ( 
https://osgeo-org.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3Af1f5e4b5-e478-42c1-ba0c-8d3dbd9e55ec
 ) *created* an issue

GeoServer ( 
https://osgeo-org.atlassian.net/browse/GEOS?atlOrigin=eyJpIjoiM2FmYTY4ZTVlN2E0NDcyNmEzMmI5ZTQ3MjAzMGNkZTgiLCJwIjoiaiJ9
 ) / Bug ( 
https://osgeo-org.atlassian.net/browse/GEOS-9664?atlOrigin=eyJpIjoiM2FmYTY4ZTVlN2E0NDcyNmEzMmI5ZTQ3MjAzMGNkZTgiLCJwIjoiaiJ9
 ) GEOS-9664 ( 
https://osgeo-org.atlassian.net/browse/GEOS-9664?atlOrigin=eyJpIjoiM2FmYTY4ZTVlN2E0NDcyNmEzMmI5ZTQ3MjAzMGNkZTgiLCJwIjoiaiJ9
 ) Intermittent rectangular gaps in WMS images ( 
https://osgeo-org.atlassian.net/browse/GEOS-9664?atlOrigin=eyJpIjoiM2FmYTY4ZTVlN2E0NDcyNmEzMmI5ZTQ3MjAzMGNkZTgiLCJwIjoiaiJ9
 )

Issue Type: Bug Affects Versions: 2.15.2, 2.16.0, 2.17.0 Assignee: Unassigned 
Attachments: 20100101_N_20100101_extent_v3.0.tif, 
NSIDC-g02135_extent_raster_daily_n.png, g02135_extent_raster_basemap.sld 
Created: 25/Jun/20 11:25 PM Environment:

Running from docker using images published by Kartoza ( 
https://hub.docker.com/r/kartoza/geoserver/ )

Image tags:
colored text

* 2.15.0 (issue not reproduced)
* 2.15.2, 2.15.5, 2.16.0, 2.17.0 (issue reproduced)

Also tested with locally built images from the kartoza/docker-geoserver repo ( 
https://github.com/kartoza/docker-geoserver ) to identify version where issue 
begins. Using 2.15.0 branch (Commit: 70d5bc8) build with geoserver versions:

* 2.15.0, 2.15.1, (do not reproduce issue)
* 2.15.2, 2.15.5, 2.16.0, 2.17.0 (do reproduce issue)

Priority: Medium Reporter: Bruce Wallin ( 
https://osgeo-org.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3Af1f5e4b5-e478-42c1-ba0c-8d3dbd9e55ec
 )

Some fraction of WMS requests (proportion varies but generally ~15%) to this 
layer return images with rectangular sections missing. See attached example 
'NSIDC-g02135_extent_raster_daily_n.png'. Missing section varies.

Steps to reproduce:

1. Create geotiff store with '20100101_N_20100101_extent_v3.0.tif' and publish 
with attached style
2. Make the following request repeatedly until issue manifests (reliably 
happens within a few dozen requests)

/geoserver/NSIDC/wms?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image%2Fpng&TRANSPARENT=true&LAYERS=NSIDC%3Ag02135_extent_raster_daily_n&SRS=EPSG%3A3411&BBOX=-5739243.027888446%2C-8150000%2C5639243.027888446%2C8650000&TILED=false&format=image%2Fpng&TIME=2010-01-01&STYLES=NSIDC%3Ag02135_extent_raster_basemap&CRS=EPSG%3A3411&FORMAT_OPTIONS=dpi%3A180&WIDTH=1020&HEIGHT=1506

( 
https://osgeo-org.atlassian.net/browse/GEOS-9664#add-comment?atlOrigin=eyJpIjoiM2FmYTY4ZTVlN2E0NDcyNmEzMmI5ZTQ3MjAzMGNkZTgiLCJwIjoiaiJ9
 ) Add Comment ( 
https://osgeo-org.atlassian.net/browse/GEOS-9664#add-comment?atlOrigin=eyJpIjoiM2FmYTY4ZTVlN2E0NDcyNmEzMmI5ZTQ3MjAzMGNkZTgiLCJwIjoiaiJ9
 )

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