PNG image from mbtiles file sometimes loads, sometimes not about tileserver-php

[arjendk]

Addition: the same goes for UTFGrid!
http://myserver.com/tiles/tileserver.php?/pc4_multi/17/67546/43194.grid.json

[arjendk]

Update: it does work correctly on my local Apache installation.

On the server phpinfo() reports:

• PHP 5.3.3
• "configure command" contains --without-sqlite and --without-sqlite3
• pdo_sqlite 3.6.20
• sqlite3 0.7-dev

Local:

• PHP 5.5.11
• "configure command" contains --with-sqlite=shared,/opt/lampp and --with-sqlite3=/opt/lampp
• pdo_sqlite 3.8.3.1
• sqlite3 0.7-dev

Apparently PHP is configured without SQLite on the server - but it does seem to work (most of the time). Could this be the problem?

[klokan]

Thanks for the reports. We will try to reproduce this on our side - this sort of error is hard to fix.

What if you try to catch the exception and read the tile again?

[daliborjanak]

Hmm strange. Have you got error logs or something more?
Try to set base url manualy. Edit line 12 in tileserver.php:

$config['baseUrls'] = array('myserver.com/tiles');

or add to path and /tileserver.php

$config['baseUrls'] = array('myserver.com/tiles/tileserver.php');

[arjendk]

No error occured so no error was logged nor could an exception be caught. The SQLite query just didn't return anything sometimes.

We were able to solve this problem by setting the connection persistance of the database, PDO::ATTR_PERSISTENT to false (line 254). It doesn't seem to affect performance very much, as far as we can tell. Hope this helps!

[klokan]

No action on our side here. Closing.