Hi all, I think tsx_timer_callback() in sip_transaction.c need more check , because during tsx_timer_callback, the transaction may be destroyed. John -----Original Message----- From: johntu@xxxxxxx Sent: Tuesday, April 27, 2010 5:10pm To: pjsip at lists.pjsip.org Subject: transaction retransmit timer event Hi, I'm new to pjsip. During heavy load (30 concurrent call), pjsip 1.5.5 seems can't handle transaction retransmit timer event correctly. 06:00:46.983 tsx0x8780ff4 Timeout timer event 06:00:47.058 tsx0x8780ff4 State changed from Terminated to Destroyed, event=TIMER 06:00:47.058 tdta0x87831e0 Destroying txdata Response msg 200/INVITE/cseq=15623 (tdta0x87831e0) 06:00:47.058 tsx0x8780ff4 Transaction destroyed! 06:00:47.058 tsx0x8780ff4 tsx_on_state_terminated for INVITE transaction , 1 8780ff4 06:00:46.983 tsx0x878065c Timeout timer event 06:00:47.060 tsx0x878065c State changed from Terminated to Destroyed, event=TIMER 06:00:47.060 tdta0x893cb48 Destroying txdata Response msg 200/INVITE/cseq=29469 (tdta0x893cb48) 06:00:47.060 tsx0x878065c Transaction destroyed! 06:00:47.060 tsx0x878065c tsx_on_state_terminated for INVITE transaction , 1 878065c 06:00:46.923 tsx0x89595dc Retransmit timer event 06:00:47.060 tsx0x89595dc tsx_on_state_destroyed for INVITE transaction , 1 89595dc iGWAdapter: ../src/pjsip/sip_transaction.c:3073: tsx_on_state_destroyed: Assertion `!"Not expecting any events!!"' failed. Aborted (core dumped) Thanks John -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100510/0a8c651a/attachment.html>