[OpenSER-Devel] returning back to db_mysql Commands out of sync errors

[Juha Heinanen]

i did again some mysql tests by restarting mysql server while openser
was running.  as result, i'm getting these kind of errors on some, but
not all, restarts:

Mar 24 14:59:18 test /usr/sbin/openser[30000]: ERROR:db_mysql:db_mysql_submit_query: driver error on query: Commands out of sync; you can't run this command now 
Mar 24 14:59:18 test /usr/sbin/openser[30000]: ERROR:core:db_do_delete: error while submitting query 
Mar 24 14:59:18 test /usr/sbin/openser[30000]: ERROR:pua:db_update: while deleting from db table pua 
Mar 24 14:59:18 test /usr/sbin/openser[30000]: ERROR:db_mysql:db_mysql_submit_query: driver error on query: Commands out of sync; you can't run this command now 
Mar 24 14:59:18 test /usr/sbin/openser[30000]: ERROR:core:db_do_raw_query: error while submitting query 
Mar 24 14:59:18 test /usr/sbin/openser[30000]: ERROR:usrloc:get_all_db_ucontacts: raw_query failed 
Mar 24 14:59:18 test /usr/sbin/openser[30000]: ERROR:mediaproxy:pingClients: failed to fetch contacts 
Mar 24 14:59:18 test /usr/sbin/openser[30000]: ERROR:db_mysql:db_mysql_submit_query: driver error on query: Commands out of sync; you can't run this command now 
...

this problem seems to affect all mysql queries, not just from presence
modules.  as i mentioned before, this is a new problem that i have not
seen a one/two of months ago.

is there any way i could debug this and find out what is going on?

-- juha