Bukkit

I have install Statistician (2.0.10) on a Debian Squeeze 64bit and original Java 7 64bit from java.com. Bukkit is version 1.2.5-R4.0. MySQL is the original MySQL from Debian with standard my.cnf, version 5.1. My confrig is:

database_address: localhost
database_port: 3306
database_name: mcstats
database_username: mcstats
database_password: XXXXXXXXXX
database_update_time: 120

Until yesturday, all works fine, new players where displayed at the Portal. But the first player today:

08:32:55 [INFO] OneUser [/92.xxx.xxx.xxx:46838] logged in with entity id 1462733 at ([world] -302.15957279145346, 70.0, -352.0779311555734)
08:32:55 [INFO] [Backup] Stopped last backup, because someone joined.
08:32:55 [WARNING] [Statistician] SELECT player_name FROM players WHERE uuid = '6272bcbd-b3ef-4b6f-ae31-ef6aee136a3f' LIMIT 1 :: Query failed, checking connection...
(Communications link failure

The last packet successfully received from the server was 29,902,908 milliseconds ago.  The last packet sent successfully to the server was 94 milliseconds ago.)
08:32:55 [WARNING] [Statistician] Connection has been lost with database, attempting to reconnect.
08:32:56 [INFO] [Statistician] Connection to the database re-established, some stats were lost though
08:32:56 [WARNING] [Statistician] CALL `mcstats`.newPlayer('6272bcbd-b3ef-4b6f-ae31-ef6aee136a3f','power286'); :: Stored procedure failed, checking connection... (Du
plicate entry '6272bcbd-b3ef-4b6f-ae31-ef6aee136a3f' for key 'PRIMARY')
08:32:56 [INFO] [Statistician] Connection is still present, it may of been a malformed query.
08:32:57 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
08:33:24 [INFO] [PLAYER_COMMAND] OneUser: /gm

The portal does not show this player. Any ideas whats wrong?