Hi all,
working on this PR <https://github.com/geoserver/geoserver/pull/5010> I
stumbled into some integrated GWC behavior that seems confusing, if not
wrong.
When configuring a new layer in GeoServer, with default tile caching, or
when adding tile caching to a
a layer,  the grid subset bonds for it as set to "dynamic", as in, computed
on the fly from the layer
own bounds (which can change over time):

[image: image.png]

Seems like a reasonable thing to do. GeoServerTileLayer can compute the
bounds dynamically, while the configuration object backing it,
GeoServerTileLayerInfo, containing the XMLGridSubsets objects, has them
with null bounds.

However, things can become less dynamic.. let's make a GetCapabilities run,
the "dynamic" bounds will be computed so that they can be reported,
and then go back to the layer tile caching tab, you get this:

[image: image.png]

If the layer is not saved, and the configuration reloaded, the page goes
back to dynamic bounds. But save the page, even for unrelated changes, and
the
bounds are now carved in stone, and I know no way to make them go back to
dynamic.

This seems wrong to me. The issue is happening in this line, updating the
xml gridset bounds while computing the tile layer dynamic bounds:
https://github.com/geoserver/geoserver/blob/main/src/gwc/src/main/java/org/geoserver/gwc/layer/GeoServerTileLayer.java#L999

I tried to get rid of it, and to try and set the extends only for the time
it takes to generate the GridSubset in the line below, but
that causes several tests to fail (report attached). Can anyone shed some
light on this behavior?

Cheers
Andrea

== GeoServer Professional Services from the experts! Visit
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[ERROR] Failures: 
[ERROR]   GWCIntegrationTest.testComputeGridsetBounds:1613 expected:<[0]> but 
was:<[]>
[ERROR]   GWCTest.testTruncateByBounds:778 
tileBreeder.seed(
    "test:testLayer",
    <any org.geowebcache.seed.SeedRequest>
);
Wanted 24 times:
-> at org.geowebcache.seed.TileBreeder.seed(TileBreeder.java:204)
But was 40 times:
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)


[ERROR]   GWCTest.testTruncateByBoundsWithDimension:853 
tileBreeder.seed(
    "test:testLayer",
    <any org.geowebcache.seed.SeedRequest>
);
Wanted 42 times:
-> at org.geowebcache.seed.TileBreeder.seed(TileBreeder.java:204)
But was 70 times:
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)
-> at 
org.geowebcache.seed.TruncateBboxRequest.lambda$doTruncate$2(TruncateBboxRequest.java:90)


[ERROR]   GeoServerTileLayerTest.testGetGridSubsetsDynamic:490 
Expected: hasProperty("originalExtent", hasProperty("minX", a numeric value 
within <1.0E-7> of <-90.0>))
     but: property 'originalExtent' property 'minX' <-180.0> differed by 
<89.9999999>
[ERROR]   GeoServerTileLayerTest.testGridsetNames:1210 arrays first differed at 
element [1]; expected:<1> but was:<0>
[ERROR] Errors: 
[ERROR]   GeoServerTileLayerTest.testGetTile:893 » GeoWebCache Problem 
communicating wit...
[ERROR]   GeoServerTileLayerTest.testGetTilePreconditions:848 » GeoWebCache 
Problem comm...
[ERROR]   
GeoServerTileLayerTest.testGridSubsetBoundsClippedToTargetCrsAreaOfValidity:543 
» NullPointer
[INFO] 
[ERROR] Tests run: 291, Failures: 5, Errors: 3, Skipped: 6

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