[sr-dev] Kamailio 3.3.5: Possible memory leak in select framework?

Hi, We are running Kamailio 3.3.5 as a Registrar service. We wanted to increase some logging, so we inserted the following lines into our configuration file: ... # log failed registration route[LOG_REG_DENIED]{ xlog("L_ERR","md=REGISTER, s=DENIED, n=$tU, ct=$sel(contact.uri.hostport), v=$sel(via[1].host)"); } # log successful registration route[LOG_REG_SUCCESS]{ xlog("L_ERR","md=REGISTER, s=OK, n=$tU, ct=$sel(contact.uri.hostport), v=$sel(via[1].host)"); } ... After about 24 hours Kamailio stopped working properly and the following ERROR messages started to appear in the log: ERROR: <core> [lvalue.c:389]: rval expression evaluation failed (141,18-141,57) ERROR: <core> [db_row.c:116]: no private memory left ERROR: db_mysql [km_row.c:58]: could not allocate row ERROR: db_mysql [km_res.c:188]: error while converting row #0 ERROR: db_mysql [km_res.c:217]: error while converting rows ERROR: db_mysql [km_dbase.c:191]: error while converting result ERROR: <core> [db_query.c:134]: error while storing result ERROR: p_usrloc [ul_db_query.c:108]: could not query table location. ERROR: p_usrloc [ul_db_query.c:52]: could not query table location error on id 12, db 1. ERROR: p_usrloc [ul_db.c:199]: error on id 12, db 1, errors occured: 1, threshold: 50 ERROR: <core> [db_row.c:116]: no private memory left ERROR: db_mysql [km_row.c:58]: could not allocate row ERROR: db_mysql [km_res.c:188]: error while converting row #0 ERROR: db_mysql [km_res.c:217]: error while converting rows ERROR: db_mysql [km_dbase.c:191]: error while converting result ERROR: <core> [db_query.c:134]: error while storing result ERROR: p_usrloc [ul_db_query.c:108]: could not query table location. ERROR: p_usrloc [ul_db_query.c:52]: could not query table location error on id 12, db 1. ERROR: <core> [db_row.c:116]: no private memory left ERROR: db_mysql [km_row.c:58]: could not allocate row ERROR: db_mysql [km_res.c:188]: error while converting row #0 ERROR: db_mysql [km_res.c:217]: error while converting rows ERROR: db_mysql [km_dbase.c:191]: error while converting result ERROR: <core> [db_query.c:134]: error while storing result ERROR: p_usrloc [ul_db_query.c:108]: could not query table location. ERROR: p_usrloc [ul_db_query.c:52]: could not query table location error on id 12, db 2. ERROR: p_usrloc [ul_db.c:199]: error on id 12, db 2, errors occured: 0, threshold: 50 ERROR: <core> [db_row.c:116]: no private memory left ERROR: db_mysql [km_row.c:58]: could not allocate row ERROR: db_mysql [km_res.c:188]: error while converting row #0 ERROR: db_mysql [km_res.c:217]: error while converting rows ERROR: db_mysql [km_dbase.c:191]: error while converting result ERROR: <core> [db_query.c:134]: error while storing result ERROR: p_usrloc [ul_db_query.c:108]: could not query table location. ERROR: p_usrloc [ul_db_query.c:52]: could not query table location error on id 12, db 2. ERROR: p_usrloc [udomain.c:433]: db_query failed ERROR: <core> [msg_translator.c:2089]: ERROR: build_res_buf_from_sip_req: out of memory ; needs 484 ERROR: sl [sl.c:270]: failed to reply stateful (tm) ERROR: registrar [reply.c:607]: failed to send 200 OK ERROR: <core> [msg_translator.c:2089]: ERROR: build_res_buf_from_sip_req: out of memory ; needs 530 ERROR: sl [sl_funcs.c:371]: ERROR: sl_reply_error used: I'm terribly sorry, server error occurred (1/SL) We strongly suppose that this memory issue is somehow caused by the above mentioned xlog-lines or the usage of the select framework inside those lines, because if we take out those lines, Kamailio is running smoothly (Currently running for 6 days now). May it be a possible memory leak in the select framework? Some statistics about our Registrar (Interval 24h): - Number of transactions: Average 500, Maximum 1000 - Number of accepted registrations: Average 7500, Maximum 14500 - Used Memory: Average 9MB, Maximum 15MB Regards, Paul