Summary:	ASTERISK-01144: Asterisk crashes when a call originated from an AGI is parked
Reporter:	jmerlino (jmerlino)	Labels:
Date Opened:	2004-03-03 13:58:23.000-0600	Date Closed:	2004-09-25 02:54:42
Priority:	Critical	Regression?	No
Status:	Closed/Complete	Components:	Core/General
Versions:		Frequency of Occurrence
Related Issues:
Environment:		Attachments:
Description:	When an extension is dialed from an AGI script and the originating call is then transferred to a parking extension asterisk crashes with segmentation fault ****** ADDITIONAL INFORMATION ****** Backtrace: (gdb) bt #0  0x0805a88e in ast_hangup (chan=0x8188220) at channel.c:604 #1  0x4225324a in do_parking_thread (ignore=0x0) at res_parking.c:471 #2  0x4002c600 in pthread_detach () from /lib/i686/libpthread.so.0 Console output:  == Parked MGCP/aaln/2@mgcp01-1 on 701    -- Playing 'digits/7' (language 'uy')    -- Playing 'digits/0' (language 'uy')    -- Playing 'digits/1' (language 'uy')    -- AGI Script dummydial.agi completed, returning 0 Mar  3 15:40:37 WARNING[180236]: channel.c:1364 ast_write: Thread 180236 Blocking 'MGCP/aaln/2@mgcp01-1', already blocked by thread 180236 in procedure ast_waitfor_nandfds Mar  3 15:40:37 WARNING[180236]: channel.c:1364 ast_write: Thread 180236 Blocking 'MGCP/aaln/2@mgcp01-1', already blocked by thread 180236 in procedure ast_waitfor_nandfds Mar  3 15:40:37 WARNING[180236]: channel.c:1364 ast_write: Thread 180236 Blocking 'MGCP/aaln/2@mgcp01-1', already blocked by thread 180236 in procedure ast_waitfor_nandfds Mar  3 15:40:37 WARNING[180236]: channel.c:1364 ast_write: Thread 180236 Blocking 'MGCP/aaln/2@mgcp01-1', already blocked by thread 180236 in procedure ast_waitfor_nandfds Mar  3 15:40:37 WARNING[180236]: channel.c:1364 ast_write: Thread 180236 Blocking 'MGCP/aaln/2@mgcp01-1', already blocked by thread 180236 in procedure ast_waitfor_nandfds Mar  3 15:40:37 WARNING[180236]: channel.c:1364 ast_write: Thread 180236 Blocking 'MGCP/aaln/2@mgcp01-1', already blocked by thread 507933 in procedure ast_waitfor_nandfds Mar  3 15:40:37 WARNING[180236]: channel.c:1364 ast_write: Thread 180236 Blocking 'MGCP/aaln/2@mgcp01-1', already blocked by thread 180236 in procedure ast_waitfor_nandfds Mar  3 15:40:37 WARNING[507933]: rtp.c:375 ast_rtp_read: RTP Read error: Resource temporarily unavailable Mar  3 15:40:38 WARNING[180236]: channel.c:1364 ast_write: Thread 180236 Blocking 'MGCP/aaln/2@mgcp01-1', already blocked by thread 180236 in procedure ast_waitfor_nandfds Mar  3 15:40:38 WARNING[180236]: channel.c:1364 ast_write: Thread 180236 Blocking 'MGCP/aaln/2@mgcp01-1', already blocked by thread 180236 in procedure ast_waitfor_nandfds Mar  3 15:40:38 WARNING[180236]: rtp.c:375 ast_rtp_read: RTP Read error: Resource temporarily unavailable Mar  3 15:40:38 WARNING[507933]: rtp.c:375 ast_rtp_read: RTP Read error: Resource temporarily unavailable Mar  3 15:40:38 WARNING[180236]: channel.c:1364 ast_write: Thread 180236 Blocking 'MGCP/aaln/2@mgcp01-1', already blocked by thread 507933 in procedure ast_waitfor_nandfds Mar  3 15:40:38 WARNING[180236]: channel.c:1364 ast_write: Thread 180236 Blocking 'MGCP/aaln/2@mgcp01-1', already blocked by thread 180236 in procedure ast_waitfor_nandfds Mar  3 15:40:38 WARNING[507933]: rtp.c:375 ast_rtp_read: RTP Read error: Resource temporarily unavailable Mar  3 15:40:38 WARNING[180236]: channel.c:1364 ast_write: Thread 180236 Blocking 'MGCP/aaln/2@mgcp01-1', already blocked by thread 507933 in procedure ast_waitfor_nandfds Mar  3 15:40:38 WARNING[507933]: rtp.c:375 ast_rtp_read: RTP Read error: Resource temporarily unavailable Mar  3 15:40:38 WARNING[180236]: rtp.c:375 ast_rtp_read: RTP Read error: Resource temporarily unavailable Mar  3 15:40:38 WARNING[180236]: channel.c:1364 ast_write: Thread 180236 Blocking 'MGCP/aaln/2@mgcp01-1', already blocked by thread 180236 in procedure ast_waitfor_nandfds    -- Endpoint 'aaln/4@mgcp01-1' observed 'hu'    -- MGCP handle_request(aaln/4@mgcp01-1) ast_channel already destroyed    -- MGCP handle_request(aaln/4@mgcp01) set vmwi(-)    -- Endpoint 'aaln/2@mgcp01-1' observed 'hu'    -- Stopped music on hold on MGCP/aaln/2@mgcp01-1    -- Executing GotoIf("MGCP/aaln/2@mgcp01-1", "1?4") in new stack    -- Goto (local,h,4)    -- Executing NoOp("MGCP/aaln/2@mgcp01-1", "") in new stack  == MGCP/aaln/2@mgcp01-1 got tired of being parked Ouch ... error while writing audio data: : Broken pipe Segmentation fault
Comments:	By: Mark Spencer (markster) 2004-03-05 09:22:26.000-0600 This trace suggests there are two threads trying to operate on the channel at one time, which is definitely a recipe for disaster.  Is your AGI executing the "dial" application or what? By: Mark Spencer (markster) 2004-03-05 09:33:32.000-0600 Okay, I think i've got this one nailed.  We have to abandon the AGI on a AST_PBX_KEEPALIVE value just as we would on a hangup.  Just make sure this really fixes it, thanks!