Hi Everyone,

(I’m new here, so please let me know if there are more appropriate ways or 
places to post this.)

- I have a GeoPackage compiled by MapTiler.
- I create a new data store based on Geopackage (mosaic).
- I click the publish link.
- The following exception occurs:

org.apache.wicket.WicketRuntimeException: Method onRequest of interface 
org.apache.wicket.behavior.IBehaviorListener targeted at 
org.apache.wicket.ajax.markup.html.AjaxLink$1@610de594 on component [AjaxLink 
[Component id = link]] threw an exception
        at 
org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:268)
        at 
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:241)
        at 
org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:248)
        at 
org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:234)
        at 
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:895)
        at 
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
        at 
org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:265)
        at 
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:222)
        at 
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:293)
        at 
org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:261)
        at 
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:203)
        at 
org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:137)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
        at 
org.springframework.web.servlet.mvc.ServletWrappingController.handleRequestInternal(ServletWrappingController.java:157)
        at 
org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:174)
        at 
org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:50)
        at 
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
        at 
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
        at 
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
        at 
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
        at 
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
        at 
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:808)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
        at 
org.geoserver.filters.ThreadLocalsCleanupFilter.doFilter(ThreadLocalsCleanupFilter.java:26)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at 
org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:69)
        at 
org.geoserver.wms.animate.AnimatorFilter.doFilter(AnimatorFilter.java:73)
        at 
org.geoserver.filters.SpringDelegatingFilter$Chain.doFilter(SpringDelegatingFilter.java:66)
        at 
org.geoserver.filters.SpringDelegatingFilter.doFilter(SpringDelegatingFilter.java:41)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at 
org.geoserver.platform.AdvancedDispatchFilter.doFilter(AdvancedDispatchFilter.java:37)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at 
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:70)
        at 
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
        at 
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:74)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
        at 
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:70)
        at 
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:74)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
        at 
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at 
org.geoserver.security.filter.GeoServerAnonymousAuthenticationFilter.doFilter(GeoServerAnonymousAuthenticationFilter.java:51)
        at 
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:70)
        at 
org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:74)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
        at 
org.geoserver.security.filter.GeoServerUserNamePasswordAuthenticationFilter.doFilter(GeoServerUserNamePasswordAuthenticationFilter.java:112)
        at 
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:70)
        at 
org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:158)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:74)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
        at 
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:70)
        at 
org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
        at 
org.geoserver.security.filter.GeoServerSecurityContextPersistenceFilter$1.doFilter(GeoServerSecurityContextPersistenceFilter.java:52)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter$NestedFilterChain.doFilter(GeoServerCompositeFilter.java:74)
        at 
org.geoserver.security.filter.GeoServerCompositeFilter.doFilter(GeoServerCompositeFilter.java:91)
        at 
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
        at 
org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
        at 
org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
        at 
org.geoserver.security.GeoServerSecurityFilterChainProxy.doFilter(GeoServerSecurityFilterChainProxy.java:141)
        at 
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:347)
        at 
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:263)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at org.geoserver.filters.LoggingFilter.doFilter(LoggingFilter.java:90)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at 
org.geoserver.filters.XFrameOptionsFilter.doFilter(XFrameOptionsFilter.java:79)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at org.geoserver.filters.GZIPFilter.doFilter(GZIPFilter.java:42)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at 
org.geoserver.filters.SessionDebugFilter.doFilter(SessionDebugFilter.java:46)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at 
org.geoserver.filters.FlushSafeFilter.doFilter(FlushSafeFilter.java:42)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at 
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
        at 
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
        at 
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
        at 
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
        at 
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
        at 
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at 
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
        at 
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
        at org.eclipse.jetty.server.Server.handle(Server.java:499)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
        at 
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
        at 
org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:258)
        ... 103 more
Caused by: java.lang.RuntimeException: Error occurred while building the 
resources for the configuration page
        at 
org.geoserver.web.data.layer.NewLayerPage.buildLayerInfo(NewLayerPage.java:435)
        at 
org.geoserver.web.data.layer.NewLayerPage$9.onClick(NewLayerPage.java:324)
        at 
org.geoserver.web.wicket.SimpleAjaxLink$1.onClick(SimpleAjaxLink.java:47)
        at 
org.apache.wicket.ajax.markup.html.AjaxLink$1.onEvent(AjaxLink.java:85)
        at 
org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:155)
        at 
org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:601)
        ... 108 more
Caused by: java.lang.NullPointerException
        at 
org.geotools.coverage.grid.io.AbstractGridCoverage2DReader.getImageLayout(AbstractGridCoverage2DReader.java:1231)
        at 
org.geoserver.catalog.CoverageDimensionCustomizerReader.getImageLayout(CoverageDimensionCustomizerReader.java:483)
        at 
org.geoserver.catalog.SingleGridCoverage2DReader.getImageLayout(SingleGridCoverage2DReader.java:206)
        at 
org.geoserver.catalog.CatalogBuilder.getCoverageSampleDimensions(CatalogBuilder.java:1159)
        at 
org.geoserver.catalog.CatalogBuilder.buildCoverageInternal(CatalogBuilder.java:1023)
        at 
org.geoserver.catalog.CatalogBuilder.buildCoverage(CatalogBuilder.java:944)
        at 
org.geoserver.catalog.CatalogBuilder.buildCoverage(CatalogBuilder.java:893)
        at 
org.geoserver.web.data.layer.NewLayerPage.buildLayerInfo(NewLayerPage.java:422)
        ... 113 more

Does anyone know what this means? I tried googling for it, as well as searching 
this mailing list, but couldn’t find anything specific to my situation. I also 
posted this issue on GIS StackExchange: 
https://gis.stackexchange.com/questions/306895/geoserver-exception-when-publishing-a-layer-based-on-a-geopackage-store
 
<https://gis.stackexchange.com/questions/306895/geoserver-exception-when-publishing-a-layer-based-on-a-geopackage-store>

One of the comments mentioned that the geopackage is not spec conformant. I 
approached the developer of MapTiler about this, and they said that aside from 
the user_account property not being correct, the package content itself should 
work.

Here is my gdalinfo output:

gdalinfo 1870.gpkg --debug on
GNM: GNMRegisterAllInternal
GNM: RegisterGNMFile
GNM: RegisterGNMdatabase
Warning 1: GPKG: unrecognized user_version=0x00000000 (0) on '1870.gpkg'
GDAL: GDALOpen(1870.gpkg, this=0xf455e0) succeeds as GPKG.
Driver: GPKG/GeoPackage
Files: 1870.gpkg
Size is 107, 149
Coordinate System is:
PROJCS["Google Maps Global Mercator",
    GEOGCS["WGS 84",
        DATUM["WGS_1984",
            SPHEROID["WGS 84",6378137,298.257223563,
                AUTHORITY["EPSG","7030"]],
            AUTHORITY["EPSG","6326"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.01745329251994328,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4326"]],
    PROJECTION["Mercator_2SP"],
    PARAMETER["standard_parallel_1",0],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",0],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["Meter",1],
    EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 
+x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext  +no_defs"],
    AUTHORITY["EPSG","900913"]]
Origin = (-7953558.976533000357449,5139746.788745000027120)
Pixel Size = (76.437028285176297,-76.437028285176297)
Metadata:
  DESCRIPTION=MapTiler Desktop Plus 10.0-788fb78a7d
  IDENTIFIER=package_tiles
  ZOOM_LEVEL=11
Image Structure Metadata:
  INTERLEAVE=PIXEL
OGRCT: Source: +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 
+y_0=0 +k=1.0 +units=m +no_defs
OGRCT: Target: +proj=longlat +ellps=WGS84 +no_defs
Corner Coordinates:
Upper Left  (-7953558.977, 5139746.789) ( 71d26'52.93"W, 41d51'29.15"N)
Lower Left  (-7953558.977, 5128357.672) ( 71d26'52.93"W, 41d46'54.67"N)
Upper Right (-7945380.215, 5139746.789) ( 71d22'28.43"W, 41d51'29.15"N)
Lower Right (-7945380.215, 5128357.672) ( 71d22'28.43"W, 41d46'54.67"N)
Center      (-7949469.596, 5134052.230) ( 71d24'40.68"W, 41d49'11.95"N)
Band 1 Block=256x256 Type=Byte, ColorInterp=Red
  Mask Flags: PER_DATASET ALPHA 
Band 2 Block=256x256 Type=Byte, ColorInterp=Green
  Mask Flags: PER_DATASET ALPHA 
Band 3 Block=256x256 Type=Byte, ColorInterp=Blue
  Mask Flags: PER_DATASET ALPHA 
Band 4 Block=256x256 Type=Byte, ColorInterp=Alpha
GDAL: GDALClose(1870.gpkg, this=0xf455e0)

I guess that leaves me with a few questions:

- Would GeoServer crash because of a warning-level issue with the package?
- Is something else at play here, not necessarily related to the package itself?
- Where is this exception logged? (It isn’t being logged to the logs folder in 
data_dir.)

Here are my server specs:
- Ubuntu 18.04
- gdalinfo 2.3.2
- geoserver 2.14.1
- 3 CPUs
- 1GB RAM

I appreciate any help on this issue, thank you for your time!

~Mike

PS: I have 3 books on GeoServer on order, and plan on diving into them as soon 
as they arrive. Please excuse my newbness, trying to dive in head-first and 
learn as quickly as possible. :)



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