=======================================================================
=== Currently Held Locks ==============================================
=======================================================================
===
=== <pending> <lock#> (<file>): <lock type> <line num> <function> <lock name> <lock addr> (times locked)
===
=== Thread ID: 1087453520 (pbx_thread           started at [ 5035] pbx.c ast_pbx_start())
=== ---> Lock #0 (channel.c): MUTEX 4618 ast_write chan 0x7f04e44f6988 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4e9375]
        /usr/sbin/asterisk(__ast_pthread_mutex_lock+0xad) [0x4e24c7]
        /usr/sbin/asterisk(__ao2_lock+0x53) [0x44654e]
        /usr/lib/asterisk/modules/chan_local.so [0x7f04e136b3a6]
        /usr/lib/asterisk/modules/chan_local.so [0x7f04e136bf69]
        /usr/sbin/asterisk(ast_write+0x1461) [0x47822c]
        /usr/sbin/asterisk [0x4800ab]
        /usr/sbin/asterisk(ast_channel_bridge+0x16ea) [0x4820f2]
        /usr/sbin/asterisk(ast_bridge_call+0xde4) [0x4be159]
        /usr/lib/asterisk/modules/app_dial.so [0x7f04d39829b4]
        /usr/lib/asterisk/modules/app_dial.so [0x7f04d3983341]
        /usr/sbin/asterisk(pbx_exec+0x1f1) [0x501a3f]
        /usr/lib/asterisk/modules/pbx_realtime.so [0x7f04cc6ecaff]
        /usr/sbin/asterisk [0x50b949]
        /usr/sbin/asterisk(ast_spawn_extension+0x64) [0x50d2fe]
        /usr/sbin/asterisk [0x50ddb4]
        /usr/sbin/asterisk [0x50fa4b]
        /usr/sbin/asterisk [0x564e30]
        /lib/libpthread.so.0 [0x7f04ec654fc7]
        /lib/libc.so.6(clone+0x6d) [0x7f04ed09d64d]
=== ---> Lock #1 (chan_local.c): MUTEX 387 local_queue_frame p 0x7f04e44b5638 (1)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4e9375]
        /usr/sbin/asterisk(__ast_pthread_mutex_trylock+0xad) [0x4e2834]
        /usr/sbin/asterisk(__ao2_trylock+0x53) [0x4466b3]
        /usr/lib/asterisk/modules/chan_local.so [0x7f04e136b3cc]
        /usr/lib/asterisk/modules/chan_local.so [0x7f04e136bf69]
        /usr/sbin/asterisk(ast_write+0x1461) [0x47822c]
        /usr/sbin/asterisk [0x4800ab]
        /usr/sbin/asterisk(ast_channel_bridge+0x16ea) [0x4820f2]
        /usr/sbin/asterisk(ast_bridge_call+0xde4) [0x4be159]
        /usr/lib/asterisk/modules/app_dial.so [0x7f04d39829b4]
        /usr/lib/asterisk/modules/app_dial.so [0x7f04d3983341]
        /usr/sbin/asterisk(pbx_exec+0x1f1) [0x501a3f]
        /usr/lib/asterisk/modules/pbx_realtime.so [0x7f04cc6ecaff]
        /usr/sbin/asterisk [0x50b949]
        /usr/sbin/asterisk(ast_spawn_extension+0x64) [0x50d2fe]
        /usr/sbin/asterisk [0x50ddb4]
        /usr/sbin/asterisk [0x50fa4b]
        /usr/sbin/asterisk [0x564e30]
        /lib/libpthread.so.0 [0x7f04ec654fc7]
        /lib/libc.so.6(clone+0x6d) [0x7f04ed09d64d]
=== ---> Tried and failed to get Lock #2 (chan_local.c): MUTEX 378 local_queue_frame other 0x7f04e42df7e8 (0)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4e9375]
        /usr/sbin/asterisk(__ast_pthread_mutex_trylock+0xad) [0x4e2834]
        /usr/sbin/asterisk(__ao2_trylock+0x53) [0x4466b3]
        /usr/lib/asterisk/modules/chan_local.so [0x7f04e136b470]
        /usr/lib/asterisk/modules/chan_local.so [0x7f04e136bf69]
        /usr/sbin/asterisk(ast_write+0x1461) [0x47822c]
        /usr/sbin/asterisk [0x4800ab]
        /usr/sbin/asterisk(ast_channel_bridge+0x16ea) [0x4820f2]
        /usr/sbin/asterisk(ast_bridge_call+0xde4) [0x4be159]
        /usr/lib/asterisk/modules/app_dial.so [0x7f04d39829b4]
        /usr/lib/asterisk/modules/app_dial.so [0x7f04d3983341]
        /usr/sbin/asterisk(pbx_exec+0x1f1) [0x501a3f]
        /usr/lib/asterisk/modules/pbx_realtime.so [0x7f04cc6ecaff]
        /usr/sbin/asterisk [0x50b949]
        /usr/sbin/asterisk(ast_spawn_extension+0x64) [0x50d2fe]
        /usr/sbin/asterisk [0x50ddb4]
        /usr/sbin/asterisk [0x50fa4b]
        /usr/sbin/asterisk [0x564e30]
        /lib/libpthread.so.0 [0x7f04ec654fc7]
        /lib/libc.so.6(clone+0x6d) [0x7f04ed09d64d]
=== -------------------------------------------------------------------
===
=== Thread ID: 1089485136 (pbx_thread           started at [ 5035] pbx.c ast_pbx_start())
=== ---> Tried and failed to get Lock #0 (chan_local.c): MUTEX 387 local_queue_frame p 0x7f04e44b5638 (0)
        /usr/sbin/asterisk(ast_bt_get_addresses+0x1a) [0x4e9375]
        /usr/sbin/asterisk(__ast_pthread_mutex_trylock+0xad) [0x4e2834]
        /usr/sbin/asterisk(__ao2_trylock+0x53) [0x4466b3]
        /usr/lib/asterisk/modules/chan_local.so [0x7f04e136b3cc]
        /usr/lib/asterisk/modules/chan_local.so [0x7f04e136bf69]
        /usr/sbin/asterisk(ast_write+0x1461) [0x47822c]
        /usr/lib/asterisk/modules/res_musiconhold.so [0x7f04e849ab15]
        /usr/sbin/asterisk [0x4737a3]
        /usr/sbin/asterisk [0x475b0e]
        /usr/sbin/asterisk(ast_read+0x1a) [0x475ea1]
        /usr/lib/asterisk/modules/app_queue.so [0x7f04cba95980]
        /usr/lib/asterisk/modules/app_queue.so [0x7f04cba983d5]
        /usr/lib/asterisk/modules/app_queue.so [0x7f04cba9ef8e]
        /usr/sbin/asterisk(pbx_exec+0x1f1) [0x501a3f]
        /usr/lib/asterisk/modules/pbx_realtime.so [0x7f04cc6ecaff]
        /usr/sbin/asterisk [0x50b949]
        /usr/sbin/asterisk(ast_spawn_extension+0x64) [0x50d2fe]
        /usr/sbin/asterisk [0x50ddb4]
        /usr/sbin/asterisk [0x50fa4b]
        /usr/sbin/asterisk [0x564e30]
        /lib/libpthread.so.0 [0x7f04ec654fc7]
        /lib/libc.so.6(clone+0x6d) [0x7f04ed09d64d]
=== -------------------------------------------------------------------
===
=======================================================================