(gdb) thread apply all bt

Thread 7 (Thread 0x7f2b0827d950 (LWP 8179)):
#0  0x00007f2b0dd1b2e9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x0000000000432135 in virCondWait (c=0x1ba5fc8, m=0x1ba5fa0) at util/threads-pthread.c:84
#2  0x00000000004171ea in qemudWorker (data=0x1baa320) at libvirtd.c:1496
#3  0x00007f2b0dd173ba in start_thread () from /lib/libpthread.so.0
#4  0x00007f2b0da83fcd in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7f2b08a7e950 (LWP 8176)):
#0  0x00007f2b0dd1b2e9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x0000000000432135 in virCondWait (c=0x1ba5fc8, m=0x1ba5fa0) at util/threads-pthread.c:84
#2  0x00000000004171ea in qemudWorker (data=0x1baa308) at libvirtd.c:1496
#3  0x00007f2b0dd173ba in start_thread () from /lib/libpthread.so.0
#4  0x00007f2b0da83fcd in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f2b0927f950 (LWP 8175)):
#0  0x00007f2b0dd1b2e9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x0000000000432135 in virCondWait (c=0x1ba5fc8, m=0x1ba5fa0) at util/threads-pthread.c:84
#2  0x00000000004171ea in qemudWorker (data=0x1baa2f0) at libvirtd.c:1496
#3  0x00007f2b0dd173ba in start_thread () from /lib/libpthread.so.0
#4  0x00007f2b0da83fcd in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f2b09a80950 (LWP 8174)):
#0  0x00007f2b0dd1da94 in __lll_lock_wait () from /lib/libpthread.so.0
#1  0x00007f2b0dd19190 in _L_lock_102 () from /lib/libpthread.so.0
#2  0x00007f2b0dd18a7e in pthread_mutex_lock () from /lib/libpthread.so.0
#3  0x000000000043207a in virMutexLock (m=0x1bc3960) at util/threads-pthread.c:52
#4  0x000000000045be29 in qemuMonitorLock (mon=0x1bc3960) at qemu/qemu_monitor.c:82
#5  0x000000000045d168 in qemuMonitorClose (mon=0x1bc3960) at qemu/qemu_monitor.c:541
#6  0x000000000043f59d in qemudShutdownVMDaemon (conn=0x1bb18f0, driver=0x1baa9e0, vm=0x1bc1500) at qemu/qemu_driver.c:2410
#7  0x000000000044103c in qemudDomainDestroy (dom=0x1bb5f00) at qemu/qemu_driver.c:3097
#8  0x00007f2b10b7fbce in virDomainDestroy (domain=0x1bb5f00) at libvirt.c:1978
#9  0x000000000041d708 in remoteDispatchDomainDestroy (server=0x1ba5fa0, client=0x1bb16e0, conn=0x1bb18f0, hdr=0x1c03fb0, 
    rerr=0x7f2b09a7fe30, args=0x7f2b09a7fed0, ret=0x7f2b09a7ff20) at remote.c:925
#10 0x000000000042619f in remoteDispatchClientCall (server=0x1ba5fa0, client=0x1bb16e0, msg=0x1bc3fa0) at dispatch.c:506
#11 0x0000000000425d74 in remoteDispatchClientRequest (server=0x1ba5fa0, client=0x1bb16e0, msg=0x1bc3fa0) at dispatch.c:388
---Type <return> to continue, or q <return> to quit---
#12 0x00000000004172af in qemudWorker (data=0x1baa2d8) at libvirtd.c:1518
#13 0x00007f2b0dd173ba in start_thread () from /lib/libpthread.so.0
#14 0x00007f2b0da83fcd in clone () from /lib/libc.so.6
#15 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f2b0a281950 (LWP 8173)):
#0  0x00007f2b0dd1b2e9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x0000000000432135 in virCondWait (c=0x1ba5fc8, m=0x1ba5fa0) at util/threads-pthread.c:84
#2  0x00000000004171ea in qemudWorker (data=0x1baa2c0) at libvirtd.c:1496
#3  0x00007f2b0dd173ba in start_thread () from /lib/libpthread.so.0
#4  0x00007f2b0da83fcd in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f2b0aa82950 (LWP 8172)):
#0  0x00007f2b0dd1da94 in __lll_lock_wait () from /lib/libpthread.so.0
#1  0x00007f2b0dd19190 in _L_lock_102 () from /lib/libpthread.so.0
#2  0x00007f2b0dd18a7e in pthread_mutex_lock () from /lib/libpthread.so.0
#3  0x000000000043207a in virMutexLock (m=0x1bc1500) at util/threads-pthread.c:52
#4  0x00007f2b10b67abf in virDomainObjLock (obj=0x1bc1500) at conf/domain_conf.c:5344
#5  0x000000000045ccb9 in qemuMonitorIO (watch=9, fd=18, events=0, opaque=0x1bc3960) at qemu/qemu_monitor.c:440
#6  0x00000000004132af in virEventDispatchHandles (nfds=7, fds=0x1bb1bf0) at event.c:473
#7  0x00000000004138b7 in virEventRunOnce () at event.c:601
#8  0x00000000004188f7 in qemudOneLoop () at libvirtd.c:2165
#9  0x0000000000418e26 in qemudRunLoop (opaque=0x1ba5fa0) at libvirtd.c:2274
#10 0x00007f2b0dd173ba in start_thread () from /lib/libpthread.so.0
#11 0x00007f2b0da83fcd in clone () from /lib/libc.so.6
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f2b114a2780 (LWP 8169)):
#0  0x00007f2b0dd17c95 in pthread_join () from /lib/libpthread.so.0
#1  0x000000000041bb39 in main (argc=1, argv=0x7fff194db738) at libvirtd.c:3183
(gdb)