[MapProxy] MBTiles cleanup error

[Denis Rykov]

Trying to perform cleanup task for MBTiles cache and get:

Traceback (most recent call last):
>   File "/home/dr/mapproxy/bin/mapproxy-seed", line 9, in <module>
>     load_entry_point('MapProxy==1.8.0', 'console_scripts',
> 'mapproxy-seed')()
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/script.py",
> line 248, in main
>     return SeedScript()()
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/script.py",
> line 184, in __call__
>     skip_geoms_for_last_levels=options.geom_levels)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/cleanup.py",
> line 41, in cleanup
>     progress_logger=progress_logger)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/cleanup.py",
> line 93, in tilewalker_cleanup
>     tile_walker.walk()
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 289, in walk
>     self._walk(bbox, self.task.levels)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 339, in _walk
>     all_subtiles=all_subtiles)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/seed/seeder.py",
> line 357, in _walk
>     self.tile_mgr.is_stale(t)]
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/cache/tile.py",
> line 169, in is_stale
>     if self.cache.is_cached(tile):
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/cache/mbtiles.py",
> line 293, in is_cached
>     return self._get_level(tile.coord[2]).is_cached(tile)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/cache/mbtiles.py",
> line 132, in is_cached
>     return self.load_tile(tile)
>   File
> "/home/dr/mapproxy/local/lib/python2.7/site-packages/mapproxy/cache/mbtiles.py",
> line 167, in load_tile
>     zoom_level = ?''', tile.coord)
> sqlite3.OperationalError: database is locked
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