I just incurred in the exact same problem using maps from this website. http://www.gadm.org/download
07-06-2017 13:53:11.944 INFO SearchOperator:Geom - in getType _reporting is 0
07-06-2017 13:53:11.944 INFO SearchOperator:Geom - in getType _reporting is 0
07-06-2017 13:53:11.944 INFO SearchOperator:Geom - loading pipIndex named regioni2
07-06-2017 13:53:11.946 INFO spatial:Util - get user-defined xpath /Placemark/name
07-06-2017 13:53:11.946 INFO spatial:Util - fullPath to spatial polygons data file: /opt/splunk/etc/apps/search/lookups/ITA_regioni.kmz
07-06-2017 13:53:11.946 INFO spatial:Util - using disk index: /opt/splunk/etc/apps/search/lookups/regioni2
07-06-2017 13:53:11.946 INFO ScopedSTLock - Waiting to acquire lock for path=/opt/splunk/etc/apps/search/lookups/regioni2
07-06-2017 13:53:11.946 INFO ScopedSTLock - Lock acquired for path=/opt/splunk/etc/apps/search/lookups/regioni2 0
07-06-2017 13:53:11.946 INFO SearchOperator:Geom - did not find clipped geometry in cache for featureCollection=regioni2
07-06-2017 13:53:11.946 INFO SearchOperator:Geom - generalization=1
07-06-2017 13:53:11.947 INFO spatial:PointInPolygonIndex - Num Keys in ray.key: 1
07-06-2017 13:53:11.947 INFO spatial:PointInPolygonIndex - Num Keys in seg.key: 0
07-06-2017 13:53:11.947 INFO spatial:PointInPolygonIndex - Num Keys in grid.key: 0
07-06-2017 13:53:11.947 INFO spatial:PointInPolygonIndex - memory mapping existing file: ray.key
07-06-2017 13:53:11.947 INFO spatial:timing:PointInPolygonIndex - memory mapped /opt/splunk/etc/apps/search/lookups/regioni2/ray.key in 0.001 sec
07-06-2017 13:53:11.947 INFO spatial:PointInPolygonIndex - memory mapping existing file: ray.val
07-06-2017 13:53:11.947 INFO spatial:timing:PointInPolygonIndex - memory mapped /opt/splunk/etc/apps/search/lookups/regioni2/ray.val in 0.001 sec
07-06-2017 13:53:11.947 INFO spatial:PointInPolygonIndex - memory mapping existing file: seg.key
07-06-2017 13:53:11.947 ERROR spatial:PointInPolygonIndex - Memmap failed, file len 0 : Invalid argument
07-06-2017 13:53:11.947 FATAL spatial:PointInPolygonIndex - can not read index file seg.key
07-06-2017 13:53:11.947 INFO spatial:PointInPolygonIndex - memory mapping existing file: seg.val
07-06-2017 13:53:11.947 ERROR spatial:PointInPolygonIndex - Memmap failed, file len 0 : Invalid argument
07-06-2017 13:53:11.947 FATAL spatial:PointInPolygonIndex - can not read index file seg.val
07-06-2017 13:53:11.947 INFO spatial:PointInPolygonIndex - memory mapping existing file: grid.key
07-06-2017 13:53:11.947 ERROR spatial:PointInPolygonIndex - Memmap failed, file len 0 : Invalid argument
07-06-2017 13:53:11.947 FATAL spatial:PointInPolygonIndex - can not read index file grid.key
07-06-2017 13:53:11.947 INFO spatial:PointInPolygonIndex - memory mapping existing file: grid.val
07-06-2017 13:53:11.947 ERROR spatial:PointInPolygonIndex - Memmap failed, file len 0 : Invalid argument
07-06-2017 13:53:11.947 FATAL spatial:PointInPolygonIndex - can not read index file grid.val
07-06-2017 13:53:11.947 FATAL spatial:PointInPolygonIndex - memmap failed! no valid keys and values
07-06-2017 13:53:11.947 INFO UserManager - Unwound user context: admin -> NULL
07-06-2017 13:53:11.947 ERROR DispatchThread - problem memmapping
07-06-2017 13:53:11.948 INFO UserManager - Setting user context: admin
07-06-2017 13:53:11.948 INFO UserManager - Done setting user context: NULL -> admin
07-06-2017 13:53:11.948 INFO UserManager - Unwound user context: admin -> NULL
07-06-2017 13:53:11.948 INFO DispatchManager - DispatchManager::dispatchHasFinished(id='1499341991.130', username='admin')
07-06-2017 13:53:11.956 INFO SearchOperator:Geom - deleting PointInPolygonIndex cache for: regioni2
07-06-2017 13:53:11.957 INFO UserManager - Unwound user context: admin -> NULL
07-06-2017 13:53:11.957 INFO UserManager - Unwound user context: admin -> NULL
07-06-2017 13:53:11.957 INFO UserManager - Unwound user context: admin -> NULL
07-06-2017 13:53:11.957 INFO UserManager - Unwound user context: admin -> NULL
07-06-2017 13:53:11.957 INFO UserManager - Unwound user context: admin -> NULL
07-06-2017 13:53:11.957 INFO UserManager - Unwound user context: admin -> NULL
07-06-2017 13:53:11.958 ERROR dispatchRunner - RunDispatch::runDispatchThread threw error: problem memmapping
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