[error] mysql_query returned (1)

Greetings,

I have several errors from the module mod_log_sql. And sometimes, i have 
a big error which fridge all the requests on Apache.

With "LogLevel warn" :

[13:22:58] root <at> ****:~$  tail -f /var/log/httpd/error.log
[Mon May 10 13:23:06 2010] [error] mysql_query returned (1)
[Mon May 10 13:23:06 2010] [notice] db reconnect successful
[Mon May 10 13:23:07 2010] [error] mysql_query returned (1)
[Mon May 10 13:23:07 2010] [notice] db reconnect successful
[Mon May 10 13:23:07 2010] [error] mysql_query returned (1)
[Mon May 10 13:23:07 2010] [notice] db reconnect successful
[Mon May 10 13:23:07 2010] [error] mysql_query returned (1)
[Mon May 10 13:23:07 2010] [notice] db reconnect successful
........ (etc)

and sometimes :
Mon May 10 12:12:47 2010] [error] mod_log_sql_mysql: database connection 
error: mysql error: Lost connection to MySQL server at 'reading initial 
communication packet', system error: 0
Mon May 10 12:12:47 2010] [error] reconnect failed, unable to reach 
database. SQL logging stopped until child regains a db connection.
Mon May 10 12:12:47 2010] [error] log entries are being preserved in 
/usr/local/httpd/logs/mod_log_sql-preserve

And with "LogLevel debug" :

[Mon May 10 13:18:17 2010] [debug] mod_log_sql.c(1045): mod_log_sql: