Re: [SR-Users] database reconnection db_unixodbc

I am testing how kamailio reacts to various database conditions. One such condition is if the database engine is simply shut down (that is, database server process no longer running, tcp listening socket closed, etc...) I am utilizing the db_unixodbc module to connect to an Informix database engine. I am currently running on Kamailio version 5.0. I have a test query that executes against the database engine every 10 seconds. Here is what i have noticed if i shut down the database engine at some point after i run Kamailio. the first test query that attempts to run against the db engine fails; it tries to reconnect and fails. The second test query (10 seconds after the 1st) results in a SIG_CHILD and shuts down the entire Kamailio process. Has anyone experienced this? Is there a solution to this? Ideally the second query should also fail and return gracefully; and ideally queries continue to fail until the database engine is back up.

See logs below: Jan 17 20:07:25 [29297]: INFO: (s) SQL query: FIRST TEST QUERY Jan 17 20:07:25 [29297]: ERROR: db_unixodbc [dbase.c:135]: db_unixodbc_submit_query(): rv=-1. Query= FIRST TEST QUERY Jan 17 20:07:25 [29297]: ERROR: db_unixodbc [connection.c:220]: db_unixodbc_extract_error(): unixodbc:SQLExecDirect=08S01:1:-11020:[Informix][Informix ODBC Driver]Communication link failure. Jan 17 20:07:25 [29297]: ERROR: db_unixodbc [dbase.c:59]: reconnect(): Attempting DB reconnect Jan 17 20:07:25 [29297]: ERROR: db_unixodbc [dbase.c:74]: reconnect(): failed to connect Jan 17 20:07:25 [29297]: ERROR: db_unixodbc [connection.c:220]: db_unixodbc_extract_error(): unixodbc:SQLDriverConnect=08002:1:0:[unixODBC][Driver Manager]Connection name in use Jan 17 20:07:25 [29297]: ERROR: db_unixodbc [connection.c:220]: db_unixodbc_extract_error(): unixodbc:SQLDriverConnect=HY010:2:-11067:[Informix][Informix ODBC Driver]Function sequence error. Jan 17 20:07:25 [29297]: ERROR: <core> [db_query.c:181]: db_do_raw_query(): error while submitting query Jan 17 20:07:25 [29297]: ERROR: sqlops [sql_api.c:265]: sql_do_query(): cannot do the query FIRST TEST QUERY Jan 17 20:07:25 [29297]: INFO: (s) [123] SQL ret: fail (-1) Jan 17 20:07:25 [29297]: INFO: (s) [123] SQL res: no rows Jan 17 20:07:35 [29297]: INFO: (s) [123] SQL query: 10 seconds later the SECOND TEST QUERY (it's the same query as the first one) Jan 17 20:07:35 [29301]: CRITICAL: <core> [core/pass_fd.c:277]: receive_fd(): EOF on 28 Jan 17 20:07:35 [29283]: ALERT: <core> [main.c:744]: handle_sigs(): child process 29297 exited by a signal 11 Jan 17 20:07:35 [29283]: ALERT: <core> [main.c:747]: handle_sigs(): core was not generated Jan 17 20:07:35 [29283]: INFO: <core> [main.c:759]: handle_sigs(): terminating due to SIGCHLD Jan 17 20:07:35 [29301]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29295]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29291]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29288]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29300]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29284]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29286]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29293]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29289]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29287]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29292]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29296]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29298]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29299]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29285]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29294]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29290]: INFO: <core> [main.c:814]: sig_usr(): signal 15 received Jan 17 20:07:35 [29283]: INFO: <core> [core/sctp_core.c:53]: sctp_core_destroy(): SCTP API not initialized